This tests Symbols work in ES6 Map. On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE". PASS map.size is 1 PASS map.get(symbol) is "Cappuccino" PASS map.has(Symbol('Cocoa')) is false PASS map.get(Symbol('Cocoa')) is undefined PASS map.has('Cocoa') is false PASS map.get('Cocoa') is undefined PASS map.has(symbol2) is false PASS map.get(symbol2) is undefined PASS map.size is 2 PASS map.get(symbol) is "Cappuccino" PASS map.get(symbol2) is "Kilimanjaro" PASS map.has(Symbol('Matcha')) is false PASS map.get(Symbol('Matcha')) is undefined PASS map.has('Matcha') is false PASS map.get('Matcha') is undefined PASS map.has(symbol2) is false PASS map.get(symbol2) is undefined PASS map.has(symbol) is true PASS map.get(symbol) is "Cappuccino" PASS map.size is 1 PASS key is symbol PASS value is "Cappuccino" PASS successfullyParsed is true TEST COMPLETE