Modified method processInputFile to make dependency injection of
LineToWordsClass and WordsToLineClass possible.
Working on test PassesOnWordDelimiterArgument
Removed LineToWordsMock and WordsToLineMock. Test case
"PassesOnWordDelimterArgument" is passing.
Set mock objects expectations using helper method in test case
InteractsCorrectlyWitFileInterfaces
Refactor test case "PassesOnWordDelimterArgument" to also use helper
method setMockExpectations.