| pub fn stringify_js(str: &str) -> String { |
| let mut escaped = String::with_capacity(str.len()); |
| for char in str.chars() { |
| match char { |
| |
| |
| |
| |
| |
| |
| '\\' => escaped.push_str(r"\\"), |
| '\n' => escaped.push_str(r"\n"), |
| '\r' => escaped.push_str(r"\r"), |
| '"' => escaped.push_str(r#"\""#), |
| '\u{0c}' => escaped.push_str(r"\f"), |
| _ => escaped.push(char), |
| } |
| } |
|
|
| format!("\"{escaped}\"") |
| } |
|
|
| #[cfg(test)] |
| mod tests { |
| use crate::util::stringify_js; |
|
|
| #[test] |
| fn surrounds_with_double_quotes() { |
| assert_eq!(stringify_js("foo"), r#""foo""#); |
| } |
|
|
| #[test] |
| fn escapes_double_quotes() { |
| assert_eq!(stringify_js(r#""""#), r#""\"\"""#); |
| } |
|
|
| #[test] |
| fn escapes_backslash() { |
| assert_eq!(stringify_js(r"\"), r#""\\""#); |
| assert_eq!(stringify_js(r"\\"), r#""\\\\""#); |
| assert_eq!(stringify_js(r"\n"), r#""\\n""#); |
| } |
|
|
| #[test] |
| fn escapes_newlines() { |
| assert_eq!(stringify_js("\n"), r#""\n""#); |
| } |
|
|
| #[test] |
| fn escapes_mixed() { |
| assert_eq!(stringify_js("\n\r\u{0c}"), r#""\n\r\f""#); |
| } |
| } |
|
|
