js/src/tests/non262/class/shell.js


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function assertThrownErrorContains(thunk, substr) {
    try {
        thunk();
    } catch (e) {
        if (e.message.indexOf(substr) !== -1)
            return;
        throw new Error("Expected error containing " + substr + ", got " + e);
    }
    throw new Error("Expected error containing " + substr + ", no exception thrown");
}