UNIT TEST: test_getHistoricalData
AAPL	AAPL   historical   historical   data   data
DOW	DOW   historical   historical   data   data

Benchmark: Yahoo getHistoricalData =1.0032

getHistoricalData: Benchmarks
Seek/Request	1.0013
XML-Object	0.0001
Object-Array	0.0001
CacheUpdate	0.0017
Re-Sort	0.0000
Reduction	0.0000
Total	1.0032