Datasets:
Download web/detox.github.io/reference/site/docs/guide/test-id/index.html from Qwen/RecreationBench: direct link, hf CLI and curl.
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- Download file 90.8 kB
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https://huggingface.co/datasets/Qwen/RecreationBench/resolve/main/web/detox.github.io/reference/site/docs/guide/test-id/index.html
- Command line
-
hf download hf://datasets/Qwen/RecreationBench/web/detox.github.io/reference/site/docs/guide/test-id/index.html
-
curl -L -o index.html https://huggingface.co/datasets/Qwen/RecreationBench/resolve/main/web/detox.github.io/reference/site/docs/guide/test-id/index.html
90.8 kB
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.68-.57.33-.87L12.67 3.6c-.38-.34-.96-.34-1.34 0l-8.36 7.53c-.34.3-.13.87.33.87H5v7c0 .55.45 1 1 1h3c.55 0 1-.45 1-1z" fill="currentColor"></path></svg></a></li><li class="breadcrumbs__item"><span class="breadcrumbs__link">Guides</span><meta content="1" itemprop="position"/></li><li class="breadcrumbs__item breadcrumbs__item--active" itemprop="itemListElement" itemscope="" itemtype="https://schema.org/ListItem"><span class="breadcrumbs__link" itemprop="name">Adding test ID's to your components</span><meta content="2" itemprop="position"/></li></ul></nav><span class="theme-doc-version-badge badge badge--secondary">Version: 20.x</span><div class="tocCollapsible_ETCw theme-doc-toc-mobile tocMobile_ITEo"><button class="clean-btn tocCollapsibleButton_TO0P" type="button">On this page</button></div><div class="theme-doc-markdown markdown"><h1>Adding test ID's to your components</h1><div class="theme-admonition theme-admonition-info alert alert--info admonition_LlT9"><div class="admonitionHeading_tbUL"><span class="admonitionIcon_kALy"><svg viewbox="0 0 14 16"><path d="M7 2.3c3.14 0 5.7 2.56 5.7 5.7s-2.56 5.7-5.7 5.7A5.71 5.71 0 0 1 1.3 8c0-3.14 2.56-5.7 5.7-5.7zM7 1C3.14 1 0 4.14 0 8s3.14 7 7 7 7-3.14 7-7-3.14-7-7-7zm1 3H6v5h2V4zm0 6H6v2h2v-2z" fill-rule="evenodd"></path></svg></span>Note</div><div class="admonitionContent_S0QG"><p>This guide was written primarily for React Native apps, but it can be generalized for testing any app, including native apps.</p></div></div><p>While <a href="/docs/api/matchers">view-element matching</a> can be done in numerous ways, it is always the best idea to match based on something unique and decoupled, as it ensures that the test code is clear, stable and sustainable over time.</p><p>We recommend assigning unique test ID's to the elements you're aiming to interact with in your tests, and preferring matching based on those rather than on anything else. Test ID's are the least likely to change over time (compared with raw text, for example), and are locale-agnostic. Furthermore, utilizing unique test ID's across the app not only simplifies the identification and interaction with specific elements but also enhances code navigability, making it easier to locate elements when traversing the codebase.</p><p>In React Native applications, <code>View</code> components have a dedicated <a href="/_404.html" rel="noopener noreferrer" target="_blank">test ID property</a> that can be utilized:</p><div class="language-jsx codeBlockContainer_Ckt0 theme-code-block" style="--prism-color: #F8F8F2; --prism-background-color: #282A36;"><div class="codeBlockContent_biex"><pre class="prism-code language-jsx codeBlock_bY9V thin-scrollbar" tabindex="0"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color: rgb(248, 248, 242);"><span class="token tag punctuation" style="color: rgb(248, 248, 242);"><</span><span class="token tag class-name" style="color: rgb(255, 121, 198);">View</span><span class="token tag punctuation" style="color: rgb(248, 248, 242);">></span><span class="token plain-text"></span><br/></span><span class="token-line" style="color: rgb(248, 248, 242);"><span class="token plain-text"> </span><span class="token tag punctuation" style="color: rgb(248, 248, 242);"><</span><span class="token tag class-name" style="color: rgb(255, 121, 198);">TouchableOpacity</span><span class="token tag" style="color: rgb(255, 121, 198);"> </span><span class="token tag attr-name" style="color: rgb(241, 250, 140);">testID</span><span class="token tag attr-value punctuation attr-equals" style="color: rgb(248, 248, 242);">=</span><span class="token tag attr-value punctuation" style="color: rgb(248, 248, 242);">"</span><span class="token tag attr-value" style="color: rgb(255, 121, 198);">Onboarding.Next_button</span><span class="token tag attr-value punctuation" style="color: rgb(248, 248, 242);">"</span><span class="token tag punctuation" style="color: rgb(248, 248, 242);">></span><span class="token plain-text"></span><br/></span><span class="token-line" style="color: rgb(248, 248, 242);"><span class="token plain-text"> </span><span class="token tag punctuation" style="color: rgb(248, 248, 242);"><</span><span class="token tag class-name" style="color: rgb(255, 121, 198);">Text</span><span class="token tag punctuation" style="color: rgb(248, 248, 242);">></span><span class="token plain-text">Next</span><span class="token tag punctuation" style="color: rgb(248, 248, 242);"></</span><span class="token tag class-name" style="color: rgb(255, 121, 198);">Text</span><span class="token tag punctuation" style="color: rgb(248, 248, 242);">></span><span class="token plain-text"></span><br/></span><span class="token-line" style="color: rgb(248, 248, 242);"><span class="token plain-text"> </span><span class="token tag punctuation" style="color: rgb(248, 248, 242);"></</span><span class="token tag class-name" style="color: rgb(255, 121, 198);">TouchableOpacity</span><span class="token tag punctuation" style="color: rgb(248, 248, 242);">></span><span class="token plain-text"></span><br/></span><span class="token-line" style="color: rgb(248, 248, 242);"><span class="token plain-text"></span><span class="token tag punctuation" style="color: rgb(248, 248, 242);"></</span><span class="token tag class-name" style="color: rgb(255, 121, 198);">View</span><span class="token tag punctuation" style="color: rgb(248, 248, 242);">></span><br/></span></code></pre><div class="buttonGroup__atx"><button aria-label="Copy code to clipboard" class="clean-btn" title="Copy" type="button"><span aria-hidden="true" class="copyButtonIcons_eSgA"><svg class="copyButtonIcon_y97N" viewbox="0 0 24 24"><path d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z" fill="currentColor"></path></svg><svg class="copyButtonSuccessIcon_LjdS" viewbox="0 0 24 24"><path d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z" fill="currentColor"></path></svg></span></button></div></div></div><p>For native apps, test ID's can be assigned by setting a value for the following properties:</p><ul><li><strong>iOS:</strong> <a href="/_404.html" rel="noopener noreferrer" target="_blank"><code>accessibilityIdentifier</code></a></li><li><strong>Android:</strong> Default <a href="/_404.html" rel="noopener noreferrer" target="_blank">viewTag</a></li></ul><h2 class="anchor anchorWithStickyNavbar_LWe7" id="pass-testid-to-your-native-components">Pass testID to your native components<a aria-label="Direct link to Pass testID to your native components" class="hash-link" href="#pass-testid-to-your-native-components" title="Direct link to Pass testID to your native components"></a></h2><p>Passing a <code>testID</code> to your custom component props has no effect until you forward it down to a native component like <code><View /></code> or <code><TouchableOpacity /></code> | |
| that implements rendering it as an accessibility identifier in the native component hierarchy:</p><p><img alt="Pass testID to native component" class="img_ev3q" height="358" loading="eager" src="/assets/images/passTestID-11f72c3a0d97eff6a62c5591ae0ea1da.png" width="2116"/></p><p>For example, you have <code><YourCustomComponent /></code> and you pass a <code>testID</code> to it:</p><div class="language-jsx codeBlockContainer_Ckt0 theme-code-block" style="--prism-color: #F8F8F2; --prism-background-color: #282A36;"><div class="codeBlockTitle_Ktv7">YourScreen.jsx</div><div class="codeBlockContent_biex"><pre class="prism-code language-jsx codeBlock_bY9V thin-scrollbar" tabindex="0"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color: rgb(248, 248, 242);"><span class="token keyword" style="color: rgb(189, 147, 249); font-style: italic;">function</span><span class="token plain"> </span><span class="token function maybe-class-name" style="color: rgb(80, 250, 123);">YourScreen</span><span class="token punctuation" style="color: rgb(248, 248, 242);">(</span><span class="token punctuation" style="color: rgb(248, 248, 242);">)</span><span class="token plain"> </span><span class="token punctuation" style="color: rgb(248, 248, 242);">{</span><span class="token plain"></span><br/></span><span class="token-line" style="color: rgb(248, 248, 242);"><span class="token plain"> </span><span class="token keyword control-flow" style="color: rgb(189, 147, 249); font-style: italic;">return</span><span class="token plain"> </span><span class="token punctuation" style="color: rgb(248, 248, 242);">(</span><span class="token plain"></span><br/></span><span class="token-line" style="color: rgb(248, 248, 242);"><span class="token plain"> </span><span class="token tag punctuation" style="color: rgb(248, 248, 242);"><</span><span class="token tag class-name" style="color: rgb(255, 121, 198);">YourCustomComponent</span><span class="token tag" style="color: rgb(255, 121, 198);"> </span><span class="token tag attr-name" style="color: rgb(241, 250, 140);">testID</span><span class="token tag attr-value punctuation attr-equals" style="color: rgb(248, 248, 242);">=</span><span class="token tag attr-value punctuation" style="color: rgb(248, 248, 242);">"</span><span class="token tag attr-value" style="color: rgb(255, 121, 198);">YourCustomComponent</span><span class="token tag attr-value punctuation" style="color: rgb(248, 248, 242);">"</span><span class="token tag" style="color: rgb(255, 121, 198);"> </span><span class="token tag punctuation" style="color: rgb(248, 248, 242);">/></span><span class="token plain"></span><br/></span><span class="token-line" style="color: rgb(248, 248, 242);"><span class="token plain"> </span><span class="token punctuation" style="color: rgb(248, 248, 242);">)</span><span class="token punctuation" style="color: rgb(248, 248, 242);">;</span><span class="token plain"></span><br/></span><span class="token-line" style="color: rgb(248, 248, 242);"><span class="token plain"></span><span class="token punctuation" style="color: rgb(248, 248, 242);">}</span><br/></span></code></pre><div class="buttonGroup__atx"><button aria-label="Copy code to clipboard" class="clean-btn" title="Copy" type="button"><span aria-hidden="true" class="copyButtonIcons_eSgA"><svg class="copyButtonIcon_y97N" viewbox="0 0 24 24"><path d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z" fill="currentColor"></path></svg><svg class="copyButtonSuccessIcon_LjdS" viewbox="0 0 24 24"><path d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z" fill="currentColor"></path></svg></span></button></div></div></div><p>Make sure that your implementation passes <code>testID</code> to some React Native component that supports it:</p><div class="language-jsx codeBlockContainer_Ckt0 theme-code-block" style="--prism-color: #F8F8F2; --prism-background-color: #282A36;"><div class="codeBlockTitle_Ktv7">YourCustomComponent.jsx</div><div class="codeBlockContent_biex"><pre class="prism-code language-jsx codeBlock_bY9V thin-scrollbar" tabindex="0"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color: rgb(248, 248, 242);"><span class="token keyword" style="color: rgb(189, 147, 249); font-style: italic;">function</span><span class="token plain"> </span><span class="token function maybe-class-name" style="color: rgb(80, 250, 123);">YourCustomComponent</span><span class="token punctuation" style="color: rgb(248, 248, 242);">(</span><span class="token parameter">props</span><span class="token punctuation" style="color: rgb(248, 248, 242);">)</span><span class="token plain"> </span><span class="token punctuation" style="color: rgb(248, 248, 242);">{</span><span class="token plain"></span><br/></span><span class="token-line" style="color: rgb(248, 248, 242);"><span class="token plain"> </span><span class="token keyword control-flow" style="color: rgb(189, 147, 249); font-style: italic;">return</span><span class="token plain"> </span><span class="token punctuation" style="color: rgb(248, 248, 242);">(</span><span class="token plain"></span><br/></span><span class="token-line theme-code-block-highlighted-line" style="color: rgb(248, 248, 242);"><span class="token plain"> </span><span class="token tag punctuation" style="color: rgb(248, 248, 242);"><</span><span class="token tag class-name" style="color: rgb(255, 121, 198);">View</span><span class="token tag" style="color: rgb(255, 121, 198);"> </span><span class="token tag attr-name" style="color: rgb(241, 250, 140);">testID</span><span class="token tag script language-javascript script-punctuation punctuation" style="color: rgb(248, 248, 242);">=</span><span class="token tag script language-javascript punctuation" style="color: rgb(248, 248, 242);">{</span><span class="token tag script language-javascript" style="color: rgb(255, 121, 198);">props</span><span class="token tag script language-javascript punctuation" style="color: rgb(248, 248, 242);">.</span><span class="token tag script language-javascript property-access" style="color: rgb(255, 121, 198);">testID</span><span class="token tag script language-javascript punctuation" style="color: rgb(248, 248, 242);">}</span><span class="token tag punctuation" style="color: rgb(248, 248, 242);">></span><span class="token plain-text"></span><br/></span><span class="token-line" style="color: rgb(248, 248, 242);"><span class="token plain-text"> </span><span class="token tag punctuation" style="color: rgb(248, 248, 242);"><</span><span class="token tag class-name" style="color: rgb(255, 121, 198);">Text</span><span class="token tag punctuation" style="color: rgb(248, 248, 242);">></span><span class="token plain-text">Some text</span><span class="token tag punctuation" style="color: rgb(248, 248, 242);"></</span><span class="token tag class-name" style="color: rgb(255, 121, 198);">Text</span><span class="token tag punctuation" style="color: rgb(248, 248, 242);">></span><span class="token plain-text"></span><br/></span><span class="token-line" style="color: rgb(248, 248, 242);"><span class="token plain-text"> </span><span class="token tag punctuation" style="color: rgb(248, 248, 242);"></</span><span class="token tag class-name" style="color: rgb(255, 121, 198);">View</span><span class="token tag punctuation" style="color: rgb(248, 248, 242);">></span><span class="token plain"></span><br/></span><span class="token-line" style="color: rgb(248, 248, 242);"><span class="token plain"> </span><span class="token punctuation" style="color: rgb(248, 248, 242);">)</span><span class="token punctuation" style="color: rgb(248, 248, 242);">;</span><span class="token plain"></span><br/></span><span class="token-line" style="color: rgb(248, 248, 242);"><span class="token plain"></span><span class="token punctuation" style="color: rgb(248, 248, 242);">}</span><br/></span></code></pre><div class="buttonGroup__atx"><button aria-label="Copy code to clipboard" class="clean-btn" title="Copy" type="button"><span aria-hidden="true" class="copyButtonIcons_eSgA"><svg class="copyButtonIcon_y97N" viewbox="0 0 24 24"><path d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z" fill="currentColor"></path></svg><svg class="copyButtonSuccessIcon_LjdS" viewbox="0 0 24 24"><path d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z" fill="currentColor"></path></svg></span></button></div></div></div><h3 class="anchor anchorWithStickyNavbar_LWe7" id="child-elements">Child elements<a aria-label="Direct link to Child elements" class="hash-link" href="#child-elements" title="Direct link to Child elements"></a></h3><p>If your component has several useful child elements, it is even a better idea to assign them some derived test IDs, e.g.:</p><div class="language-jsx codeBlockContainer_Ckt0 theme-code-block" style="--prism-color: #F8F8F2; --prism-background-color: #282A36;"><div class="codeBlockTitle_Ktv7">YourCustomComponent.jsx</div><div class="codeBlockContent_biex"><pre class="prism-code language-jsx codeBlock_bY9V thin-scrollbar" tabindex="0"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color: rgb(248, 248, 242);"><span class="token keyword" style="color: rgb(189, 147, 249); font-style: italic;">function</span><span class="token plain"> </span><span class="token function maybe-class-name" style="color: rgb(80, 250, 123);">YourCustomComponent</span><span class="token punctuation" style="color: rgb(248, 248, 242);">(</span><span class="token parameter">props</span><span class="token punctuation" style="color: rgb(248, 248, 242);">)</span><span class="token plain"> </span><span class="token punctuation" style="color: rgb(248, 248, 242);">{</span><span class="token plain"></span><br/></span><span class="token-line" style="color: rgb(248, 248, 242);"><span class="token plain"> </span><span class="token keyword control-flow" style="color: rgb(189, 147, 249); font-style: italic;">return</span><span class="token plain"> </span><span class="token punctuation" style="color: rgb(248, 248, 242);">(</span><span class="token plain"></span><br/></span><span class="token-line theme-code-block-highlighted-line" style="color: rgb(248, 248, 242);"><span class="token plain"> </span><span class="token tag punctuation" style="color: rgb(248, 248, 242);"><</span><span class="token tag class-name" style="color: rgb(255, 121, 198);">View</span><span class="token tag" style="color: rgb(255, 121, 198);"> </span><span class="token tag attr-name" style="color: rgb(241, 250, 140);">testID</span><span class="token tag script language-javascript script-punctuation punctuation" style="color: rgb(248, 248, 242);">=</span><span class="token tag script language-javascript punctuation" style="color: rgb(248, 248, 242);">{</span><span class="token tag script language-javascript" style="color: rgb(255, 121, 198);">props</span><span class="token tag script language-javascript punctuation" style="color: rgb(248, 248, 242);">.</span><span class="token tag script language-javascript property-access" style="color: rgb(255, 121, 198);">testID</span><span class="token tag script language-javascript punctuation" style="color: rgb(248, 248, 242);">}</span><span class="token tag punctuation" style="color: rgb(248, 248, 242);">></span><span class="token plain-text"></span><br/></span><span class="token-line" style="color: rgb(248, 248, 242);"><span class="token plain-text"> </span><span class="token tag punctuation" style="color: rgb(248, 248, 242);"><</span><span class="token tag class-name" style="color: rgb(255, 121, 198);">Text</span><span class="token tag" style="color: rgb(255, 121, 198);"> </span><span class="token tag attr-name" style="color: rgb(241, 250, 140);">testID</span><span class="token tag script language-javascript script-punctuation punctuation" style="color: rgb(248, 248, 242);">=</span><span class="token tag script language-javascript punctuation" style="color: rgb(248, 248, 242);">{</span><span class="token tag script language-javascript template-string template-punctuation string" style="color: rgb(255, 121, 198);">`</span><span class="token tag script language-javascript template-string interpolation interpolation-punctuation punctuation" style="color: rgb(248, 248, 242);">${</span><span class="token tag script language-javascript template-string interpolation" style="color: rgb(255, 121, 198);">props</span><span class="token tag script language-javascript template-string interpolation punctuation" style="color: rgb(248, 248, 242);">.</span><span class="token tag script language-javascript template-string interpolation property-access" style="color: rgb(255, 121, 198);">testID</span><span class="token tag script language-javascript template-string interpolation interpolation-punctuation punctuation" style="color: rgb(248, 248, 242);">}</span><span class="token tag script language-javascript template-string string" style="color: rgb(255, 121, 198);">.label</span><span class="token tag script language-javascript template-string template-punctuation string" style="color: rgb(255, 121, 198);">`</span><span class="token tag script language-javascript punctuation" style="color: rgb(248, 248, 242);">}</span><span class="token tag punctuation" style="color: rgb(248, 248, 242);">></span><span class="token plain-text">Some text</span><span class="token tag punctuation" style="color: rgb(248, 248, 242);"></</span><span class="token tag class-name" style="color: rgb(255, 121, 198);">Text</span><span class="token tag punctuation" style="color: rgb(248, 248, 242);">></span><span class="token plain-text"></span><br/></span><span class="token-line" style="color: rgb(248, 248, 242);"><span class="token plain-text"> </span><span class="token tag punctuation" style="color: rgb(248, 248, 242);"></</span><span class="token tag class-name" style="color: rgb(255, 121, 198);">View</span><span class="token tag punctuation" style="color: rgb(248, 248, 242);">></span><span class="token plain"></span><br/></span><span class="token-line" style="color: rgb(248, 248, 242);"><span class="token plain"> </span><span class="token punctuation" style="color: rgb(248, 248, 242);">)</span><span class="token punctuation" style="color: rgb(248, 248, 242);">;</span><span class="token plain"></span><br/></span><span class="token-line" style="color: rgb(248, 248, 242);"><span class="token plain"></span><span class="token punctuation" style="color: rgb(248, 248, 242);">}</span><br/></span></code></pre><div class="buttonGroup__atx"><button aria-label="Copy code to clipboard" class="clean-btn" title="Copy" type="button"><span aria-hidden="true" class="copyButtonIcons_eSgA"><svg class="copyButtonIcon_y97N" viewbox="0 0 24 24"><path d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z" fill="currentColor"></path></svg><svg class="copyButtonSuccessIcon_LjdS" viewbox="0 0 24 24"><path d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z" fill="currentColor"></path></svg></span></button></div></div></div><p>That way, you could refer to specific elements in Detox tests via the most basic and least ambiguous <code>by.id</code> matchers, e.g.:</p><div class="language-js codeBlockContainer_Ckt0 theme-code-block" style="--prism-color: #F8F8F2; --prism-background-color: #282A36;"><div class="codeBlockContent_biex"><pre class="prism-code language-js codeBlock_bY9V thin-scrollbar" tabindex="0"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color: rgb(248, 248, 242);"><span class="token function" style="color: rgb(80, 250, 123);">expect</span><span class="token punctuation" style="color: rgb(248, 248, 242);">(</span><span class="token function" style="color: rgb(80, 250, 123);">element</span><span class="token punctuation" style="color: rgb(248, 248, 242);">(</span><span class="token plain">by</span><span class="token punctuation" style="color: rgb(248, 248, 242);">.</span><span class="token method function property-access" style="color: rgb(80, 250, 123);">id</span><span class="token punctuation" style="color: rgb(248, 248, 242);">(</span><span class="token string" style="color: rgb(255, 121, 198);">'YourCustomComponent'</span><span class="token punctuation" style="color: rgb(248, 248, 242);">)</span><span class="token punctuation" style="color: rgb(248, 248, 242);">)</span><span class="token punctuation" style="color: rgb(248, 248, 242);">)</span><span class="token punctuation" style="color: rgb(248, 248, 242);">.</span><span class="token method function property-access" style="color: rgb(80, 250, 123);">toBeVisible</span><span class="token punctuation" style="color: rgb(248, 248, 242);">(</span><span class="token punctuation" style="color: rgb(248, 248, 242);">)</span><span class="token punctuation" style="color: rgb(248, 248, 242);">;</span><span class="token plain"></span><br/></span><span class="token-line" style="color: rgb(248, 248, 242);"><span class="token plain"></span><span class="token function" style="color: rgb(80, 250, 123);">expect</span><span class="token punctuation" style="color: rgb(248, 248, 242);">(</span><span class="token function" style="color: rgb(80, 250, 123);">element</span><span class="token punctuation" style="color: rgb(248, 248, 242);">(</span><span class="token plain">by</span><span class="token punctuation" style="color: rgb(248, 248, 242);">.</span><span class="token method function property-access" style="color: rgb(80, 250, 123);">id</span><span class="token punctuation" style="color: rgb(248, 248, 242);">(</span><span class="token string" style="color: rgb(255, 121, 198);">'YourCustomComponent.label'</span><span class="token punctuation" style="color: rgb(248, 248, 242);">)</span><span class="token punctuation" style="color: rgb(248, 248, 242);">)</span><span class="token punctuation" style="color: rgb(248, 248, 242);">)</span><span class="token punctuation" style="color: rgb(248, 248, 242);">.</span><span class="token method function property-access" style="color: rgb(80, 250, 123);">toHaveText</span><span class="token punctuation" style="color: rgb(248, 248, 242);">(</span><span class="token string" style="color: rgb(255, 121, 198);">'Some text'</span><span class="token punctuation" style="color: rgb(248, 248, 242);">)</span><span class="token punctuation" style="color: rgb(248, 248, 242);">;</span><br/></span></code></pre><div class="buttonGroup__atx"><button aria-label="Copy code to clipboard" class="clean-btn" title="Copy" type="button"><span aria-hidden="true" class="copyButtonIcons_eSgA"><svg class="copyButtonIcon_y97N" viewbox="0 0 24 24"><path d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z" fill="currentColor"></path></svg><svg class="copyButtonSuccessIcon_LjdS" viewbox="0 0 24 24"><path d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z" fill="currentColor"></path></svg></span></button></div></div></div><h3 class="anchor anchorWithStickyNavbar_LWe7" id="repetitive-components">Repetitive components<a aria-label="Direct link to Repetitive components" class="hash-link" href="#repetitive-components" title="Direct link to Repetitive components"></a></h3><p>It is highly not recommended to use non-unique <code>testID</code>, e.g. when your components get rendered in any sort of repeater or virtualized list:</p><div class="language-jsx codeBlockContainer_Ckt0 theme-code-block" style="--prism-color: #F8F8F2; --prism-background-color: #282A36;"><div class="codeBlockTitle_Ktv7">YourScreen.jsx</div><div class="codeBlockContent_biex"><pre class="prism-code language-jsx codeBlock_bY9V thin-scrollbar" tabindex="0"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color: rgb(248, 248, 242);"><span class="token keyword" style="color: rgb(189, 147, 249); font-style: italic;">const</span><span class="token plain"> </span><span class="token constant" style="color: rgb(189, 147, 249);">ITEMS</span><span class="token plain"> </span><span class="token operator">=</span><span class="token plain"> </span><span class="token punctuation" style="color: rgb(248, 248, 242);">[</span><span class="token plain"></span><br/></span><span class="token-line" style="color: rgb(248, 248, 242);"><span class="token plain"> </span><span class="token punctuation" style="color: rgb(248, 248, 242);">{</span><span class="token plain"> </span><span class="token literal-property property">title</span><span class="token operator">:</span><span class="token plain"> </span><span class="token string" style="color: rgb(255, 121, 198);">'First Item'</span><span class="token plain"> </span><span class="token punctuation" style="color: rgb(248, 248, 242);">}</span><span class="token punctuation" style="color: rgb(248, 248, 242);">,</span><span class="token plain"></span><br/></span><span class="token-line" style="color: rgb(248, 248, 242);"><span class="token plain"> </span><span class="token punctuation" style="color: rgb(248, 248, 242);">{</span><span class="token plain"> </span><span class="token literal-property property">title</span><span class="token operator">:</span><span class="token plain"> </span><span class="token string" style="color: rgb(255, 121, 198);">'Second Item'</span><span class="token plain"> </span><span class="token punctuation" style="color: rgb(248, 248, 242);">}</span><span class="token punctuation" style="color: rgb(248, 248, 242);">,</span><span class="token plain"></span><br/></span><span class="token-line" style="color: rgb(248, 248, 242);"><span class="token plain"> </span><span class="token punctuation" style="color: rgb(248, 248, 242);">{</span><span class="token plain"> </span><span class="token literal-property property">title</span><span class="token operator">:</span><span class="token plain"> </span><span class="token string" style="color: rgb(255, 121, 198);">'Third Item'</span><span class="token plain"> </span><span class="token punctuation" style="color: rgb(248, 248, 242);">}</span><span class="token punctuation" style="color: rgb(248, 248, 242);">,</span><span class="token plain"></span><br/></span><span class="token-line" style="color: rgb(248, 248, 242);"><span class="token plain"></span><span class="token punctuation" style="color: rgb(248, 248, 242);">]</span><span class="token punctuation" style="color: rgb(248, 248, 242);">;</span><span class="token plain"></span><br/></span><span class="token-line" style="color: rgb(248, 248, 242);"><span class="token plain" style="display: inline-block;"></span><br/></span><span class="token-line" style="color: rgb(248, 248, 242);"><span class="token plain"></span><span class="token keyword" style="color: rgb(189, 147, 249); font-style: italic;">function</span><span class="token plain"> </span><span class="token function maybe-class-name" style="color: rgb(80, 250, 123);">YourScreen</span><span class="token punctuation" style="color: rgb(248, 248, 242);">(</span><span class="token punctuation" style="color: rgb(248, 248, 242);">)</span><span class="token plain"> </span><span class="token punctuation" style="color: rgb(248, 248, 242);">{</span><span class="token plain"></span><br/></span><span class="token-line" style="color: rgb(248, 248, 242);"><span class="token plain"> </span><span class="token keyword" style="color: rgb(189, 147, 249); font-style: italic;">const</span><span class="token plain"> </span><span class="token function-variable function" style="color: rgb(80, 250, 123);">renderItem</span><span class="token plain"> </span><span class="token operator">=</span><span class="token plain"> </span><span class="token punctuation" style="color: rgb(248, 248, 242);">(</span><span class="token parameter punctuation" style="color: rgb(248, 248, 242);">{</span><span class="token parameter"> item </span><span class="token parameter punctuation" style="color: rgb(248, 248, 242);">}</span><span class="token punctuation" style="color: rgb(248, 248, 242);">)</span><span class="token plain"> </span><span class="token arrow operator">=></span><span class="token plain"> </span><span class="token punctuation" style="color: rgb(248, 248, 242);">(</span><span class="token plain"></span><br/></span><span class="token-line theme-code-block-highlighted-line" style="color: rgb(248, 248, 242);"><span class="token plain"> </span><span class="token tag punctuation" style="color: rgb(248, 248, 242);"><</span><span class="token tag class-name" style="color: rgb(255, 121, 198);">YourCustomComponent</span><span class="token tag" style="color: rgb(255, 121, 198);"> </span><span class="token tag attr-name" style="color: rgb(241, 250, 140);">testID</span><span class="token tag script language-javascript script-punctuation punctuation" style="color: rgb(248, 248, 242);">=</span><span class="token tag script language-javascript punctuation" style="color: rgb(248, 248, 242);">{</span><span class="token tag script language-javascript string" style="color: rgb(255, 121, 198);">'listItem'</span><span class="token tag script language-javascript punctuation" style="color: rgb(248, 248, 242);">}</span><span class="token tag" style="color: rgb(255, 121, 198);"> </span><span class="token tag attr-name" style="color: rgb(241, 250, 140);">label</span><span class="token tag script language-javascript script-punctuation punctuation" style="color: rgb(248, 248, 242);">=</span><span class="token tag script language-javascript punctuation" style="color: rgb(248, 248, 242);">{</span><span class="token tag script language-javascript" style="color: rgb(255, 121, 198);">item</span><span class="token tag script language-javascript punctuation" style="color: rgb(248, 248, 242);">.</span><span class="token tag script language-javascript property-access" style="color: rgb(255, 121, 198);">title</span><span class="token tag script language-javascript punctuation" style="color: rgb(248, 248, 242);">}</span><span class="token tag" style="color: rgb(255, 121, 198);"> </span><span class="token tag punctuation" style="color: rgb(248, 248, 242);">/></span><span class="token plain"></span><br/></span><span class="token-line" style="color: rgb(248, 248, 242);"><span class="token plain"> </span><span class="token punctuation" style="color: rgb(248, 248, 242);">)</span><span class="token punctuation" style="color: rgb(248, 248, 242);">;</span><span class="token plain"></span><br/></span><span class="token-line" style="color: rgb(248, 248, 242);"><span class="token plain" style="display: inline-block;"></span><br/></span><span class="token-line" style="color: rgb(248, 248, 242);"><span class="token plain"> </span><span class="token keyword control-flow" style="color: rgb(189, 147, 249); font-style: italic;">return</span><span class="token plain"> </span><span class="token punctuation" style="color: rgb(248, 248, 242);">(</span><span class="token plain"></span><br/></span><span class="token-line" style="color: rgb(248, 248, 242);"><span class="token plain"> </span><span class="token tag punctuation" style="color: rgb(248, 248, 242);"><</span><span class="token tag class-name" style="color: rgb(255, 121, 198);">FlatList</span><span class="token tag" style="color: rgb(255, 121, 198);"></span><br/></span><span class="token-line" style="color: rgb(248, 248, 242);"><span class="token tag" style="color: rgb(255, 121, 198);"> </span><span class="token tag attr-name" style="color: rgb(241, 250, 140);">data</span><span class="token tag script language-javascript script-punctuation punctuation" style="color: rgb(248, 248, 242);">=</span><span class="token tag script language-javascript punctuation" style="color: rgb(248, 248, 242);">{</span><span class="token tag script language-javascript constant" style="color: rgb(189, 147, 249);">ITEMS</span><span class="token tag script language-javascript punctuation" style="color: rgb(248, 248, 242);">}</span><span class="token tag" style="color: rgb(255, 121, 198);"></span><br/></span><span class="token-line" style="color: rgb(248, 248, 242);"><span class="token tag" style="color: rgb(255, 121, 198);"> </span><span class="token tag attr-name" style="color: rgb(241, 250, 140);">renderItem</span><span class="token tag script language-javascript script-punctuation punctuation" style="color: rgb(248, 248, 242);">=</span><span class="token tag script language-javascript punctuation" style="color: rgb(248, 248, 242);">{</span><span class="token tag script language-javascript" style="color: rgb(255, 121, 198);">renderItem</span><span class="token tag script language-javascript punctuation" style="color: rgb(248, 248, 242);">}</span><span class="token tag" style="color: rgb(255, 121, 198);"></span><br/></span><span class="token-line" style="color: rgb(248, 248, 242);"><span class="token tag" style="color: rgb(255, 121, 198);"> </span><span class="token tag punctuation" style="color: rgb(248, 248, 242);">/></span><span class="token plain"></span><br/></span><span class="token-line" style="color: rgb(248, 248, 242);"><span class="token plain"> </span><span class="token punctuation" style="color: rgb(248, 248, 242);">)</span><span class="token punctuation" style="color: rgb(248, 248, 242);">;</span><span class="token plain"></span><br/></span><span class="token-line" style="color: rgb(248, 248, 242);"><span class="token plain"></span><span class="token punctuation" style="color: rgb(248, 248, 242);">}</span><br/></span></code></pre><div class="buttonGroup__atx"><button aria-label="Copy code to clipboard" class="clean-btn" title="Copy" type="button"><span aria-hidden="true" class="copyButtonIcons_eSgA"><svg class="copyButtonIcon_y97N" viewbox="0 0 24 24"><path d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z" fill="currentColor"></path></svg><svg class="copyButtonSuccessIcon_LjdS" viewbox="0 0 24 24"><path d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z" fill="currentColor"></path></svg></span></button></div></div></div><p>This would be a violation of accessibility guidelines and unnecessary complication for your test matchers. | |
| You’d also have to use extra matchers and <code>.atIndex</code> clarification:</p><div class="language-js codeBlockContainer_Ckt0 theme-code-block" style="--prism-color: #F8F8F2; --prism-background-color: #282A36;"><div class="codeBlockContent_biex"><pre class="prism-code language-js codeBlock_bY9V thin-scrollbar" tabindex="0"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color: rgb(248, 248, 242);"><span class="token function" style="color: rgb(80, 250, 123);">expect</span><span class="token punctuation" style="color: rgb(248, 248, 242);">(</span><span class="token function" style="color: rgb(80, 250, 123);">element</span><span class="token punctuation" style="color: rgb(248, 248, 242);">(</span><span class="token plain">by</span><span class="token punctuation" style="color: rgb(248, 248, 242);">.</span><span class="token method function property-access" style="color: rgb(80, 250, 123);">id</span><span class="token punctuation" style="color: rgb(248, 248, 242);">(</span><span class="token string" style="color: rgb(255, 121, 198);">'listItem'</span><span class="token punctuation" style="color: rgb(248, 248, 242);">)</span><span class="token punctuation" style="color: rgb(248, 248, 242);">)</span><span class="token punctuation" style="color: rgb(248, 248, 242);">.</span><span class="token method function property-access" style="color: rgb(80, 250, 123);">atIndex</span><span class="token punctuation" style="color: rgb(248, 248, 242);">(</span><span class="token number">2</span><span class="token punctuation" style="color: rgb(248, 248, 242);">)</span><span class="token punctuation" style="color: rgb(248, 248, 242);">)</span><span class="token punctuation" style="color: rgb(248, 248, 242);">.</span><span class="token method function property-access" style="color: rgb(80, 250, 123);">toHaveText</span><span class="token punctuation" style="color: rgb(248, 248, 242);">(</span><span class="token string" style="color: rgb(255, 121, 198);">'Third Item'</span><span class="token punctuation" style="color: rgb(248, 248, 242);">)</span><span class="token punctuation" style="color: rgb(248, 248, 242);">;</span><br/></span></code></pre><div class="buttonGroup__atx"><button aria-label="Copy code to clipboard" class="clean-btn" title="Copy" type="button"><span aria-hidden="true" class="copyButtonIcons_eSgA"><svg class="copyButtonIcon_y97N" viewbox="0 0 24 24"><path d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z" fill="currentColor"></path></svg><svg class="copyButtonSuccessIcon_LjdS" viewbox="0 0 24 24"><path d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z" fill="currentColor"></path></svg></span></button></div></div></div><p>Instead, you could generate a unique <code>testID</code> for every list item with the <code>index</code> property:</p><div class="language-jsx codeBlockContainer_Ckt0 theme-code-block" style="--prism-color: #F8F8F2; --prism-background-color: #282A36;"><div class="codeBlockContent_biex"><pre class="prism-code language-jsx codeBlock_bY9V thin-scrollbar" tabindex="0"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color: rgb(248, 248, 242);"><span class="token plain"> </span><span class="token keyword" style="color: rgb(189, 147, 249); font-style: italic;">const</span><span class="token plain"> </span><span class="token function-variable function" style="color: rgb(80, 250, 123);">renderItem</span><span class="token plain"> </span><span class="token operator">=</span><span class="token plain"> </span><span class="token punctuation" style="color: rgb(248, 248, 242);">(</span><span class="token parameter punctuation" style="color: rgb(248, 248, 242);">{</span><span class="token parameter"> item</span><span class="token parameter punctuation" style="color: rgb(248, 248, 242);">,</span><span class="token parameter"> index </span><span class="token parameter punctuation" style="color: rgb(248, 248, 242);">}</span><span class="token punctuation" style="color: rgb(248, 248, 242);">)</span><span class="token plain"> </span><span class="token arrow operator">=></span><span class="token plain"> </span><span class="token punctuation" style="color: rgb(248, 248, 242);">(</span><span class="token plain"></span><br/></span><span class="token-line" style="color: rgb(248, 248, 242);"><span class="token plain"> </span><span class="token tag punctuation" style="color: rgb(248, 248, 242);"><</span><span class="token tag class-name" style="color: rgb(255, 121, 198);">YourCustomComponent</span><span class="token tag" style="color: rgb(255, 121, 198);"> </span><span class="token tag attr-name" style="color: rgb(241, 250, 140);">testID</span><span class="token tag script language-javascript script-punctuation punctuation" style="color: rgb(248, 248, 242);">=</span><span class="token tag script language-javascript punctuation" style="color: rgb(248, 248, 242);">{</span><span class="token tag script language-javascript template-string template-punctuation string" style="color: rgb(255, 121, 198);">`</span><span class="token tag script language-javascript template-string string" style="color: rgb(255, 121, 198);">listItem.</span><span class="token tag script language-javascript template-string interpolation interpolation-punctuation punctuation" style="color: rgb(248, 248, 242);">${</span><span class="token tag script language-javascript template-string interpolation" style="color: rgb(255, 121, 198);">index </span><span class="token tag script language-javascript template-string interpolation operator" style="color: rgb(255, 121, 198);">+</span><span class="token tag script language-javascript template-string interpolation" style="color: rgb(255, 121, 198);"> </span><span class="token tag script language-javascript template-string interpolation number" style="color: rgb(255, 121, 198);">1</span><span class="token tag script language-javascript template-string interpolation interpolation-punctuation punctuation" style="color: rgb(248, 248, 242);">}</span><span class="token tag script language-javascript template-string template-punctuation string" style="color: rgb(255, 121, 198);">`</span><span class="token tag script language-javascript punctuation" style="color: rgb(248, 248, 242);">}</span><span class="token tag" style="color: rgb(255, 121, 198);"> </span><span class="token tag attr-name" style="color: rgb(241, 250, 140);">label</span><span class="token tag script language-javascript script-punctuation punctuation" style="color: rgb(248, 248, 242);">=</span><span class="token tag script language-javascript punctuation" style="color: rgb(248, 248, 242);">{</span><span class="token tag script language-javascript" style="color: rgb(255, 121, 198);">item</span><span class="token tag script language-javascript punctuation" style="color: rgb(248, 248, 242);">.</span><span class="token tag script language-javascript property-access" style="color: rgb(255, 121, 198);">title</span><span class="token tag script language-javascript punctuation" style="color: rgb(248, 248, 242);">}</span><span class="token tag" style="color: rgb(255, 121, 198);"> </span><span class="token tag punctuation" style="color: rgb(248, 248, 242);">/></span><span class="token plain"></span><br/></span><span class="token-line" style="color: rgb(248, 248, 242);"><span class="token plain"> </span><span class="token punctuation" style="color: rgb(248, 248, 242);">)</span><span class="token punctuation" style="color: rgb(248, 248, 242);">;</span><br/></span></code></pre><div class="buttonGroup__atx"><button aria-label="Copy code to clipboard" class="clean-btn" title="Copy" type="button"><span aria-hidden="true" class="copyButtonIcons_eSgA"><svg class="copyButtonIcon_y97N" viewbox="0 0 24 24"><path d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z" fill="currentColor"></path></svg><svg class="copyButtonSuccessIcon_LjdS" viewbox="0 0 24 24"><path d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z" fill="currentColor"></path></svg></span></button></div></div></div><p>That way, your assertion would become simpler and more deterministic:</p><div class="language-js codeBlockContainer_Ckt0 theme-code-block" style="--prism-color: #F8F8F2; --prism-background-color: #282A36;"><div class="codeBlockContent_biex"><pre class="prism-code language-js codeBlock_bY9V thin-scrollbar" tabindex="0"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color: rgb(248, 248, 242);"><span class="token function" style="color: rgb(80, 250, 123);">expect</span><span class="token punctuation" style="color: rgb(248, 248, 242);">(</span><span class="token function" style="color: rgb(80, 250, 123);">element</span><span class="token punctuation" style="color: rgb(248, 248, 242);">(</span><span class="token plain">by</span><span class="token punctuation" style="color: rgb(248, 248, 242);">.</span><span class="token method function property-access" style="color: rgb(80, 250, 123);">id</span><span class="token punctuation" style="color: rgb(248, 248, 242);">(</span><span class="token string" style="color: rgb(255, 121, 198);">'listItem.3'</span><span class="token punctuation" style="color: rgb(248, 248, 242);">)</span><span class="token punctuation" style="color: rgb(248, 248, 242);">)</span><span class="token punctuation" style="color: rgb(248, 248, 242);">)</span><span class="token punctuation" style="color: rgb(248, 248, 242);">.</span><span class="token method function property-access" style="color: rgb(80, 250, 123);">toHaveText</span><span class="token punctuation" style="color: rgb(248, 248, 242);">(</span><span class="token string" style="color: rgb(255, 121, 198);">'Third Item'</span><span class="token punctuation" style="color: rgb(248, 248, 242);">)</span><span class="token punctuation" style="color: rgb(248, 248, 242);">;</span><br/></span></code></pre><div class="buttonGroup__atx"><button aria-label="Copy code to clipboard" class="clean-btn" title="Copy" type="button"><span aria-hidden="true" class="copyButtonIcons_eSgA"><svg class="copyButtonIcon_y97N" viewbox="0 0 24 24"><path d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z" fill="currentColor"></path></svg><svg class="copyButtonSuccessIcon_LjdS" viewbox="0 0 24 24"><path d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z" fill="currentColor"></path></svg></span></button></div></div></div><p><img alt="testID for repetitive components" class="img_ev3q" height="624" loading="eager" src="/assets/images/repetitiveComponentTestID-6fffa71a68b1f2015a4e8b96ece1e0e3.png" width="2117"/></p><h2 class="anchor anchorWithStickyNavbar_LWe7" id="finding-your-test-id">Finding your test ID<a aria-label="Direct link to Finding your test ID" class="hash-link" href="#finding-your-test-id" title="Direct link to Finding your test ID"></a></h2><div class="theme-admonition theme-admonition-note alert alert--secondary admonition_LlT9"><div class="admonitionHeading_tbUL"><span class="admonitionIcon_kALy"><svg viewbox="0 0 14 16"><path d="M6.3 5.69a.942.942 0 0 1-.28-.7c0-.28.09-.52.28-.7.19-.18.42-.28.7-.28.28 0 .52.09.7.28.18.19.28.42.28.7 0 .28-.09.52-.28.7a1 1 0 0 1-.7.3c-.28 0-.52-.11-.7-.3zM8 7.99c-.02-.25-.11-.48-.31-.69-.2-.19-.42-.3-.69-.31H6c-.27.02-.48.13-.69.31-.2.2-.3.44-.31.69h1v3c.02.27.11.5.31.69.2.2.42.31.69.31h1c.27 0 .48-.11.69-.31.2-.19.3-.42.31-.69H8V7.98v.01zM7 2.3c-3.14 0-5.7 2.54-5.7 5.68 0 3.14 2.56 5.7 5.7 5.7s5.7-2.55 5.7-5.7c0-3.15-2.56-5.69-5.7-5.69v.01zM7 .98c3.86 0 7 3.14 7 7s-3.14 7-7 7-7-3.12-7-7 3.14-7 7-7z" fill-rule="evenodd"></path></svg></span>note</div><div class="admonitionContent_S0QG"><p>Incorrect or absent <code>testID</code> is a common cause for test failure. | |
| If your test can't find your <code>testID</code> and you can't see it either using tools described below, that usually means you haven't passed it down to this component. | |
| Make sure you keep forwarding it down until it reaches a native component.</p></div></div><p>To make sure your <code>testID</code> is indeed rendered in your app, you can use such tools as MacOS' built-in <a href="/_404.html" rel="noopener noreferrer" target="_blank">accessibility inspector</a> for iOS, and <a href="/_404.html" rel="noopener noreferrer" target="_blank">Detox Layout-inspector</a> (setup required) for Android.</p><h2 class="anchor anchorWithStickyNavbar_LWe7" id="test-id-naming---best-practices">Test ID naming - Best practices<a aria-label="Direct link to Test ID naming - Best practices" class="hash-link" href="#test-id-naming---best-practices" title="Direct link to Test ID naming - Best practices"></a></h2><p>Test ID's work best when they are unique, simple and concise. Here are our recommendations regarding what rules to follow in terms of naming.</p><h3 class="anchor anchorWithStickyNavbar_LWe7" id="use-a-consistent-naming-system">Use a consistent naming system<a aria-label="Direct link to Use a consistent naming system" class="hash-link" href="#use-a-consistent-naming-system" title="Direct link to Use a consistent naming system"></a></h3><p>Decide upon a system by which test ID's are named, and stick with it.</p><ol><li><p>Use a consistent naming convention. An <code>ITEM_NAME_ALL_CAPS</code> convention and an <code>ItemNameUpperCamelCase</code> are both ok, but <strong>don't use them either intermittently nor in conjunction:</strong></p><ul><li><code>SITE_LIST_ROOT</code> & <code>SITE_LIST_ITEM_1</code> - :white<!-- -->_<!-- -->check<!-- -->_<!-- -->mark:</li><li><code>SITE_LIST_ROOT</code> & <code>SiteList_Item1</code> - ❌</li><li><code>SITE_LIST_Item1</code> - ❌</li></ul></li><li><p>Consistently apply notations for special items. For example:</p><ul><li>A <code>_ROOT</code> postfix for screen-root or list-root items (e.g. <code>SITE_LIST_ROOT</code>)</li><li>A <code>_BTN</code> for buttons / touchable CTA elements</li></ul></li><li><p>Apply consistent prefixes as categories in order to introduce a top-level context to the test ID, distinguishing it from similar ones in various places in the app. The name of the associated screen can be useful in that sense. For example: <code>EDIT_PROFILE_SCREEN.DONE_BTN</code> is better than just <code>DONE_BTN</code> for a button that is inside a user profile editing screen. Also, things such as <code>NAV_TABS.</code>, <code>TOP_TABS.</code> and <code>SIDE_MENU.</code> can be used as good context providers.</p></li><li><p>As explained in the section on passing test ID's to <em>child</em> elements, drill down to the details of elements via a <em>chain of contexts</em>. Given the parent element-group of an element (for example, a card in a feed), use its own test ID as a prefix for the sub-items (e.g. an options "meatballs" / "kebab" CTA or an <em>edit</em> button). For example:</p><ul><li><code>SITE_LIST_ITEM1</code> ⇒<ul><li><code>SITE_LIST_ITEM1.OPTIONS</code></li><li><code>SITE_LIST_ITEM1.EDIT_BTN</code></li><li><code>SITE_LIST_ITEM1.TITLE</code></li></ul></li></ul></li><li><p>In a large-scale, multi-module environment, apply a consistent module identifier as the module's test ID's prefix. For example:</p><ul><li><code>AUTH.LOGIN_SCREEN.EDIT_PASSWORD</code> - the <code>AUTH.</code> prefix suggests that were are under the context of a module handling Authentication matters.</li></ul></li></ol><div class="theme-admonition theme-admonition-tip alert alert--success admonition_LlT9"><div class="admonitionHeading_tbUL"><span class="admonitionIcon_kALy"><svg viewbox="0 0 12 16"><path d="M6.5 0C3.48 0 1 2.19 1 5c0 .92.55 2.25 1 3 1.34 2.25 1.78 2.78 2 4v1h5v-1c.22-1.22.66-1.75 2-4 .45-.75 1-2.08 1-3 0-2.81-2.48-5-5.5-5zm3.64 7.48c-.25.44-.47.8-.67 1.11-.86 1.41-1.25 2.06-1.45 3.23-.02.05-.02.11-.02.17H5c0-.06 0-.13-.02-.17-.2-1.17-.59-1.83-1.45-3.23-.2-.31-.42-.67-.67-1.11C2.44 6.78 2 5.65 2 5c0-2.2 2.02-4 4.5-4 1.22 0 2.36.42 3.22 1.19C10.55 2.94 11 3.94 11 5c0 .66-.44 1.78-.86 2.48zM4 14h5c-.23 1.14-1.3 2-2.5 2s-2.27-.86-2.5-2z" fill-rule="evenodd"></path></svg></span>tip</div><div class="admonitionContent_S0QG"><p>Don't hesitate to articulate a well defined conventions manifest that all teams should adhere to.</p></div></div><h3 class="anchor anchorWithStickyNavbar_LWe7" id="use-simple-names">Use simple names<a aria-label="Direct link to Use simple names" class="hash-link" href="#use-simple-names" title="Direct link to Use simple names"></a></h3><p>Stick to simple alpha-numeric characters, and simple separators. When it comes to test ID's, there's usually no reason to use special characters or emojis.</p><p>In addition, use test ID that clearly describe the associated element, but are also concise. For example:</p><ul><li><code>SITE_LIST_ROOT</code> - :white<!-- -->_<!-- -->check<!-- -->_<!-- -->mark:</li><li><code>MAIN_SITE_LIST_WRAPPER_ELEMENT</code> - ❌</li><li><code>SITE_LIST@ITEM$1</code> - ❌</li></ul><h3 class="anchor anchorWithStickyNavbar_LWe7" id="dissociate-test-id-names">Dissociate test ID names<a aria-label="Direct link to Dissociate test ID names" class="hash-link" href="#dissociate-test-id-names" title="Direct link to Dissociate test ID names"></a></h3><p>Make sure the names you give test ID's are completely decoupled and dissociated from everything else in the system. In particular -</p><div class="theme-admonition theme-admonition-warning alert alert--danger admonition_LlT9"><div class="admonitionHeading_tbUL"><span class="admonitionIcon_kALy"><svg viewbox="0 0 12 16"><path d="M5.05.31c.81 2.17.41 3.38-.52 4.31C3.55 5.67 1.98 6.45.9 7.98c-1.45 2.05-1.7 6.53 3.53 7.7-2.2-1.16-2.67-4.52-.3-6.61-.61 2.03.53 3.33 1.94 2.86 1.39-.47 2.3.53 2.27 1.67-.02.78-.31 1.44-1.13 1.81 3.42-.59 4.78-3.42 4.78-5.56 0-2.84-2.53-3.22-1.25-5.61-1.52.13-2.03 1.13-1.89 2.75.09 1.08-1.02 1.8-1.86 1.33-.67-.41-.66-1.19-.06-1.78C8.18 5.31 8.68 2.45 5.05.32L5.03.3l.02.01z" fill-rule="evenodd"></path></svg></span>Attention</div><div class="admonitionContent_S0QG"><p>By all means, <strong>never utilize the element's text / label in the naming of a test ID!</strong> | |
| Namely, a test ID should never use <code>text</code> or <code>label</code> props passed to a React Native component.</p></div></div><p>There are at least 2 reasons why this is a very important rule:</p><ol><li>Alternation of test ID's can lead to broken tests (test-ID based matchers become obsolete), and on-screen text can change frequently.</li><li>In apps supporting multiple languages, the on-screen text is likely to be different in each language. You want the same test code to be compatible with any language set into the test device, and you therefore need it have as little awareness to it as possible. Using test ID's is the best means to keep it that way.</li></ol><h3 class="anchor anchorWithStickyNavbar_LWe7" id="examples">Examples<a aria-label="Direct link to Examples" class="hash-link" href="#examples" title="Direct link to Examples"></a></h3><p>Based on the <code>ALL_CAPS</code> convention, here is an example of a screen which test ID's illustrate the principles of this discussion:</p><p><img alt="Test ID: Naming example" class="img_ev3q" height="1105" loading="eager" src="/assets/images/naming-example-42987c3697b6b78a3ae705fb15ea7a48.png" width="1083"/></p></div><footer class="theme-doc-footer docusaurus-mt-lg"><div class="theme-doc-footer-edit-meta-row row"><div class="col"><a class="theme-edit-this-page" href="/_404.html" rel="noreferrer noopener" target="_blank"><svg aria-hidden="true" class="iconEdit_Z9Sw" fill="currentColor" height="20" viewbox="0 0 40 40" width="20"><g><path d="m34.5 11.7l-3 3.1-6.3-6.3 3.1-3q0.5-0.5 1.2-0.5t1.1 0.5l3.9 3.9q0.5 0.4 0.5 1.1t-0.5 1.2z m-29.5 17.1l18.4-18.5 6.3 6.3-18.4 18.4h-6.3v-6.2z"></path></g></svg>Edit this page</a></div><div class="col lastUpdated_vwxv"></div></div></footer></article><nav aria-label="Docs pages" class="pagination-nav docusaurus-mt-lg"><a class="pagination-nav__link pagination-nav__link--prev" href="/docs/introduction/preparing-for-ci"><div class="pagination-nav__sublabel">Previous</div><div class="pagination-nav__label">Preparing for CI</div></a><a class="pagination-nav__link pagination-nav__link--next" href="/docs/guide/parallel-test-execution"><div class="pagination-nav__sublabel">Next</div><div class="pagination-nav__label">Parallel Test Execution</div></a></nav></div></div><div class="col col--3"><div class="tableOfContents_bqdL thin-scrollbar theme-doc-toc-desktop"><ul class="table-of-contents table-of-contents__left-border"><li><a class="table-of-contents__link toc-highlight" href="#pass-testid-to-your-native-components">Pass testID to your native components</a><ul><li><a class="table-of-contents__link toc-highlight" href="#child-elements">Child elements</a></li><li><a class="table-of-contents__link toc-highlight" href="#repetitive-components">Repetitive components</a></li></ul></li><li><a class="table-of-contents__link toc-highlight" href="#finding-your-test-id">Finding your test ID</a></li><li><a class="table-of-contents__link toc-highlight" href="#test-id-naming---best-practices">Test ID naming - Best practices</a><ul><li><a class="table-of-contents__link toc-highlight" href="#use-a-consistent-naming-system">Use a consistent naming system</a></li><li><a class="table-of-contents__link toc-highlight" href="#use-simple-names">Use simple names</a></li><li><a class="table-of-contents__link toc-highlight" href="#dissociate-test-id-names">Dissociate test ID names</a></li><li><a class="table-of-contents__link toc-highlight" href="#examples">Examples</a></li></ul></li></ul></div></div></div></div></main></div></div><footer class="footer"><div class="container container-fluid"><div class="row footer__links"><div class="col footer__col footer__col_docs"><div class="footer__title">Docs</div><ul class="footer__items clean-list"><li class="footer__item"><a class="footer__link-item" href="/docs/introduction/getting-started">Getting Started</a></li><li class="footer__item"><a class="footer__link-item" href="/docs/contributing">Contributing to Detox</a></li></ul></div><div class="col footer__col footer__col_support"><div class="footer__title">Support</div><ul class="footer__items clean-list"><li class="footer__item"><a class="footer__link-item footer__link-item_ask-a-question-on-stack-overflow" href="/_404.html" rel="noopener noreferrer" target="_blank">Ask a question on Stack Overflow</a></li><li class="footer__item"><a class="footer__link-item footer__link-item_create-new-issue-on-github" href="/_404.html" rel="noopener noreferrer" target="_blank">Create new issue on Github</a></li></ul></div><div class="col footer__col footer__col_more"><div class="footer__title">More</div><ul class="footer__items clean-list"><li class="footer__item"><a class="footer__link-item footer__link-item_git-hub" href="/_404.html" rel="noopener noreferrer" target="_blank">GitHub</a></li><li class="footer__item"><a class="footer__link-item footer__link-item_twitter" href="/_404.html" rel="noopener noreferrer" target="_blank">Twitter</a></li><li class="footer__item"><a class="footer__link-item footer__link-item_discord" href="/_404.html" rel="noopener noreferrer" target="_blank">Discord</a></li></ul></div></div></div></footer></div> | |
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