The logic is in NumbersInWordsConverter.cs (NumbersInWords/NumbersInWords/Converters/)
The tests are in NumbersInWordsConverterTest.cs (NumbersInWords/NumbersInWords.Tests/Converters/)
In the allotted time, I was able to develop 4 tests for the NumberInWordsCoverter class
- NumberToWords_Ones
- NumberToWords_Tens
- NumberToWords_LessThanHundred
- NumberToWords_ElevenThroughNineteen