This test checks behavior with expressions that create deep parse trees. On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE". PASS eval(repeatedExpression("letterA", "+", 100)) is repeatedString("a", 100) PASS eval(repeatedExpression("letterA", "+", 1000)) is repeatedString("a", 1000) FAIL eval(repeatedExpression("letterA", "+", 10000)) should be 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Threw exception RangeError: Maximum call stack size exceeded PASS eval(repeatedExpression("letterA", "+", 100000)) threw exception RangeError: Maximum call stack size exceeded. PASS successfullyParsed is true TEST COMPLETE