fix tests

[sbdchd]

minor typo in the tests, getSeconds -> setSeconds

[sbdchd]

Oh I think that test doesn't work, typescript gives an error:

Duplicate identifier 'Date'.(2300)
lib.es5.d.ts(749, 11): 'Date' was also declared here.
lib.es5.d.ts(927, 13): and here.
lib.es5.d.ts(4473, 11): and here.
lib.scripthost.d.ts(325, 11): and here.
lib.es2015.symbol.wellknown.d.ts(110, 11): and here.

https://www.typescriptlang.org/play?#code/MYGwhgzhAEAiYBcCm0DeAoaXoSQgyksAPYB2AJhABS4kUQBc0pArgLYBGSATgJRqZsQuhGIgkAOhDEA5jSJlKvANyCsAX3SaRCaADNixaAF5mSAO5xESKivQHiE3AQX0qARgBMAZhVA