test_candidate_extraction() — tailwindcss Function Reference

Source Code

crates/oxide/src/extractor/candidate_machine.rs lines 201–317

    fn test_candidate_extraction() {
        for (input, expected) in [
            // Simple utility
            ("flex", vec!["flex"]),
            // Simple utility with special character(s)
            ("@container", vec!["@container"]),
            // Single character utility
            ("a", vec!["a"]),
            // Simple utility with dashes
            ("items-center", vec!["items-center"]),
            // Simple utility with numbers
            ("px-2.5", vec!["px-2.5"]),
            // Simple variant with simple utility
            ("hover:flex", vec!["hover:flex"]),
            // Arbitrary properties
            ("[color:red]", vec!["[color:red]"]),
            ("![color:red]", vec!["![color:red]"]),
            ("[color:red]!", vec!["[color:red]!"]),
            ("[color:red]/20", vec!["[color:red]/20"]),
            ("![color:red]/20", vec!["![color:red]/20"]),
            ("[color:red]/20!", vec!["[color:red]/20!"]),
            // With multiple variants
            ("hover:focus:flex", vec!["hover:focus:flex"]),
            // Exceptions:
            //
            // Keys inside of a JS object could be a variant-less candidate. Vue example.
            ("{ underline: true }", vec!["underline", "true"]),
            // With complex variants
            (
                "[&>[data-slot=icon]:last-child]:right-2.5",
                vec!["[&>[data-slot=icon]:last-child]:right-2.5"],
            ),
            // With multiple (complex) variants
            (
                "[&>[data-slot=icon]:last-child]:sm:right-2.5",
                vec!["[&>[data-slot=icon]:last-child]:sm:right-2.5"],
            ),
            (
                "sm:[&>[data-slot=icon]:last-child]:right-2.5",
                vec!["sm:[&>[data-slot=icon]:last-child]:right-2.5"],
            ),
            // Exceptions regarding boundaries
            //
            // `flex!` is valid, but since it's followed by a non-boundary character it's invalid.
            // `block` is therefore also invalid because it didn't start after a boundary.
            ("flex!block", vec![]),
        ] {
            for (wrapper, additional) in [
                // No wrapper
                ("{}", vec![]),
                // With leading spaces
                (" {}", vec![]),
                ("  {}", vec![]),
                ("   {}", vec![]),
                // With trailing spaces
                ("{} ", vec![]),
                ("{}  ", vec![]),
                ("{}   ", vec![]),
                // Surrounded by spaces
                (" {} ", vec![]),
                // Inside a string
                ("'{}'", vec![]),
                // Inside a function call
                ("fn('{}')", vec![]),
                // Inside nested function calls
                ("fn1(fn2('{}'))", vec![]),
                // --------------------------
                //
                // HTML
                // Inside a class (on its own)
                (r#"<div class="{}"></div>"#, vec!["class"]),
                // Inside a class (first)
                (r#"<div class="{} foo"></div>"#, vec!["class", "foo"]),
                // Inside a class (second)
                (r#"<div class="foo {}"></div>"#, vec!["class", "foo"]),
                // Inside a class (surrounded)
                (
                    r#"<div class="foo {} bar"></div>"#,
                    vec!["class", "foo", "bar"],
                ),
                // --------------------------
                //
                // JavaScript
                // Inside a variable
                (r#"let classes = '{}';"#, vec!["let", "classes"]),
                // Inside an object (key)
                (
                    r#"let classes = { '{}': true };"#,
                    vec!["let", "classes", "true"],
                ),
                // Inside an object (no spaces, key)
                (r#"let classes = {'{}':true};"#, vec!["let", "classes"]),
                // Inside an object (value)
                (
                    r#"let classes = { primary: '{}' };"#,
                    vec!["let", "classes", "primary"],
                ),
                // Inside an object (no spaces, value)
                (r#"let classes = {primary:'{}'};"#, vec!["let", "classes"]),
            ] {
                let input = wrapper.replace("{}", input);

                let mut expected = expected.clone();
                expected.extend(additional);
                expected.sort();

                let mut actual = CandidateMachine::test_extract_all(&input);
                actual.sort();

                if actual != expected {
                    dbg!(&input);
                }

                assert_eq!(actual, expected);
            }
        }
    }