swc-project/swc · error

No test found

Error message

No test found

What it means

Raised at the end of expand_from in swc_testing_macros (fixture.rs:173). The macro expands each discovered fixture file into a #[test] function; if the collection ends with zero test functions — because the fixture directory is empty, all entries were filtered out by exclude() patterns, or every path was skipped as hidden — this panic fires. It signals the attribute was applied but produced no tests, usually indicating a wrong directory path or an over-broad exclude regex.

Source

Thrown at crates/testing_macros/src/fixture.rs:173

        let path_str = abs_path.to_string_lossy();
        let f = quote!(
            #[test]
            #[inline(never)]
            #[doc(hidden)]
            #[allow(non_snake_case)]
            #ignored_attr
            fn #test_ident() {
                eprintln!("Input: {}", #path_str);

                #callee(::std::path::PathBuf::from(#path_str));
            }
        );

        test_fns.push(f);
    }

    if test_fns.is_empty() {
        panic!("No test found")
    }

    Ok(test_fns)
}

/// Returns whether a manifest-relative fixture path contains a hidden
/// component.
fn is_ignored_fixture(path: &Path) -> bool {
    path.components().any(|component| match component {
        Component::Normal(name) => name.to_string_lossy().starts_with('.'),
        _ => false,
    })
}

struct InputParen {
    input: Punctuated<LitStr, Token![,]>,
}

View on GitHub (pinned to 5176682b65)

Solutions

1. Verify the directory passed to #[fixture] actually contains fixture files
2. Loosen or fix the exclude() regexes if they are filtering out every fixture
3. Print the scanned directory and the exclusion decisions before panicking to ease diagnosis

When it happens

Trigger: Thrown at crates/testing_macros/src/fixture.rs:173 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of swc-project/swc@5176682b65 (2026-08-17). Data as JSON: /api/errors/e2e5750c4d9ba717. Report an issue: GitHub.