Tests basic correctness of ES Map's clear() API On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE". PASS stringMap.size is 0 PASS stringMap.values.length is 0 PASS stringMap.has('Oliver') is false PASS stringMap.has('Benjamin') is false PASS valueMap.size is 0 PASS valueMap.values.length is 0 PASS valueMap.has(0) is false PASS valueMap.has(1) is false PASS objectMap.size is 0 PASS objectMap.values.length is 0 PASS objectMap.has(anArray) is false PASS objectMap.has(anObject) is false PASS objectMap.has(otherObject) is false PASS mixedTypeMap.size is 0 PASS mixedTypeMap.values.length is 0 PASS mixedTypeMap.has(0) is false PASS mixedTypeMap.has('Oliver') is false PASS mixedTypeMap.has(stringMap) is false PASS mixedTypeMap.has(valueMap) is false PASS mixedTypeMap.has(objectMap) is false PASS mixedTypeMap.has(anObject) is false PASS successfullyParsed is true TEST COMPLETE