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* @license
* Copyright 2025 Google LLC
* SPDX-License-Identifier: Apache-2.0
*/
import { describe, it, expect, beforeEach, vi } from 'vitest';
import { createMockCommandContext } from '../../test-utils/mockCommandContext.js';
import { type CommandContext } from '../../ui/commands/types.js';
import { AtFileProcessor } from './atFileProcessor.js';
import { MessageType } from '../../ui/types.js';
import type { Config } from '@google/gemini-cli-core';
import type { PartUnion } from '@google/genai';
// Mock the core dependency
const mockReadPathFromWorkspace = vi.hoisted(() => vi.fn());
vi.mock('@google/gemini-cli-core', async (importOriginal) => {
const original = await importOriginal<object>();
return {
...original,
readPathFromWorkspace: mockReadPathFromWorkspace,
};
});
describe('AtFileProcessor', () => {
let context: CommandContext;
let mockConfig: Config;
beforeEach(() => {
vi.clearAllMocks();
mockConfig = {
// The processor only passes the config through, so we don't need a full mock.
get config() {
return this;
},
} as unknown as Config;
context = createMockCommandContext({
services: {
agentContext: mockConfig,
},
});
// Default mock success behavior: return content wrapped in a text part.
mockReadPathFromWorkspace.mockImplementation(
async (path: string): Promise<PartUnion[]> => [
{ text: `content of ${path}` },
],
);
});
it('should not change the prompt if no @{ trigger is present', async () => {
const processor = new AtFileProcessor();
const prompt: PartUnion[] = [{ text: 'This is a simple prompt.' }];
const result = await processor.process(prompt, context);
expect(result).toEqual(prompt);
expect(mockReadPathFromWorkspace).not.toHaveBeenCalled();
});
it('should not change the prompt if config service is missing', async () => {
const processor = new AtFileProcessor();
const prompt: PartUnion[] = [{ text: 'Analyze @{file.txt}' }];
const contextWithoutConfig = createMockCommandContext({
services: {
agentContext: null,
},
});
const result = await processor.process(prompt, contextWithoutConfig);
expect(result).toEqual(prompt);
expect(mockReadPathFromWorkspace).not.toHaveBeenCalled();
});
describe('Parsing Logic', () => {
it('should replace a single valid @{path/to/file.txt} placeholder', async () => {
const processor = new AtFileProcessor();
const prompt: PartUnion[] = [
{ text: 'Analyze this file: @{path/to/file.txt}' },
];
const result = await processor.process(prompt, context);
expect(mockReadPathFromWorkspace).toHaveBeenCalledWith(
'path/to/file.txt',
mockConfig,
);
expect(result).toEqual([
{ text: 'Analyze this file: ' },
{ text: 'content of path/to/file.txt' },
]);
});
it('should replace multiple different @{...} placeholders', async () => {
const processor = new AtFileProcessor();
const prompt: PartUnion[] = [
{ text: 'Compare @{file1.js} with @{file2.js}' },
];
const result = await processor.process(prompt, context);
expect(mockReadPathFromWorkspace).toHaveBeenCalledTimes(2);
expect(mockReadPathFromWorkspace).toHaveBeenCalledWith(
'file1.js',
mockConfig,
);
expect(mockReadPathFromWorkspace).toHaveBeenCalledWith(
'file2.js',
mockConfig,
);
expect(result).toEqual([
{ text: 'Compare ' },
{ text: 'content of file1.js' },
{ text: ' with ' },
{ text: 'content of file2.js' },
]);
});
it('should handle placeholders at the beginning, middle, and end', async () => {
const processor = new AtFileProcessor();
const prompt: PartUnion[] = [
{ text: '@{start.txt} in the @{middle.txt} and @{end.txt}' },
];
const result = await processor.process(prompt, context);
expect(result).toEqual([
{ text: 'content of start.txt' },
{ text: ' in the ' },
{ text: 'content of middle.txt' },
{ text: ' and ' },
{ text: 'content of end.txt' },
]);
});
it('should correctly parse paths that contain balanced braces', async () => {
const processor = new AtFileProcessor();
const prompt: PartUnion[] = [
{ text: 'Analyze @{path/with/{braces}/file.txt}' },
];
const result = await processor.process(prompt, context);
expect(mockReadPathFromWorkspace).toHaveBeenCalledWith(
'path/with/{braces}/file.txt',
mockConfig,
);
expect(result).toEqual([
{ text: 'Analyze ' },
{ text: 'content of path/with/{braces}/file.txt' },
]);
});
it('should throw an error if the prompt contains an unclosed trigger', async () => {
const processor = new AtFileProcessor();
const prompt: PartUnion[] = [{ text: 'Hello @{world' }];
// The new parser throws an error for unclosed injections.
await expect(processor.process(prompt, context)).rejects.toThrow(
/Unclosed injection/,
);
});
});
describe('Integration and Error Handling', () => {
it('should leave the placeholder unmodified if readPathFromWorkspace throws', async () => {
const processor = new AtFileProcessor();
const prompt: PartUnion[] = [
{ text: 'Analyze @{not-found.txt} and @{good-file.txt}' },
];
mockReadPathFromWorkspace.mockImplementation(async (path: string) => {
if (path === 'not-found.txt') {
throw new Error('File not found');
}
return [{ text: `content of ${path}` }];
});
const result = await processor.process(prompt, context);
expect(result).toEqual([
{ text: 'Analyze ' },
{ text: '@{not-found.txt}' }, // Placeholder is preserved as a text part
{ text: ' and ' },
{ text: 'content of good-file.txt' },
]);
});
});
describe('UI Feedback', () => {
it('should call ui.addItem with an ERROR on failure', async () => {
const processor = new AtFileProcessor();
const prompt: PartUnion[] = [{ text: 'Analyze @{bad-file.txt}' }];
mockReadPathFromWorkspace.mockRejectedValue(new Error('Access denied'));
await processor.process(prompt, context);
expect(context.ui.addItem).toHaveBeenCalledTimes(1);
expect(context.ui.addItem).toHaveBeenCalledWith(
{
type: MessageType.ERROR,
text: "Failed to inject content for '@{bad-file.txt}': Access denied",
},
expect.any(Number),
);
});
it('should call ui.addItem with a WARNING if the file was ignored', async () => {
const processor = new AtFileProcessor();
const prompt: PartUnion[] = [{ text: 'Analyze @{ignored.txt}' }];
// Simulate an ignored file by returning an empty array.
mockReadPathFromWorkspace.mockResolvedValue([]);
const result = await processor.process(prompt, context);
// The placeholder should be removed, resulting in only the prefix.
expect(result).toEqual([{ text: 'Analyze ' }]);
expect(context.ui.addItem).toHaveBeenCalledTimes(1);
expect(context.ui.addItem).toHaveBeenCalledWith(
{
type: MessageType.INFO,
text: "File '@{ignored.txt}' was ignored by .gitignore or .geminiignore and was not included in the prompt.",
},
expect.any(Number),
);
});
it('should NOT call ui.addItem on success', async () => {
const processor = new AtFileProcessor();
const prompt: PartUnion[] = [{ text: 'Analyze @{good-file.txt}' }];
await processor.process(prompt, context);
expect(context.ui.addItem).not.toHaveBeenCalled();
});
});
});
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