Checklist

Create the following methods:
log2(double number) : double
getRange(String s): integer
hasUpper(String s): boolean
hasLower(String s): boolean
hasDigit(String s): boolean
getSymbolCount(String s, String allowedSymbols): integer
calcEntropy(String s)
Create tests for each of the above methods.
You should be sure to test for all situations, including pathologic cases  There should be at least 20ish tests for each of the functions.