Function reject

tests/integration/compiler_undefined_var.rs:8–21

(src: &str, fragment: &str)

    let mut p = CompilationPipeline::new();
    p.set_write_artifacts(false);
    let err = p
        .compile(src)
        .expect_err(&format!("expected compile to fail with '{fragment}'"));
    match &err {
        CompilationError::DiagnosticErrors(diags) => assert!(
            diags.iter().any(|d| d.message.contains(fragment)),
            "expected diagnostic containing `{fragment}`\ngot: {diags:?}"
        ),
        other => panic!("expected DiagnosticErrors, got: {other:?}"),
    }
}

fn accept(src: &str) {
    let mut p = CompilationPipeline::new();
    p.set_write_artifacts(false);
    p.compile(src)
        .unwrap_or_else(|e| panic!("expected compile to succeed, got: {e}"));