| function shouldThrowSyntaxError(str, message) { | |
| try { | |
| eval(str); | |
| throw new Error("Expected `" + str + "` to throw a SyntaxError, but did not throw.") | |
| } catch (e) { | |
| if (e.constructor !== SyntaxError) | |
| throw new Error("Expected `" + str + "` to throw a SyntaxError, but threw '" + e + "'"); | |
| if (message !== void 0 && e.message !== message) | |
| throw new Error("Expected `" + str + "` to throw SyntaxError: '" + message + "', but threw '" + e + "'"); | |
| } | |
| } | |
| shouldThrowSyntaxError("0/-async J", "Unexpected identifier 'J'") | |