public void TestExpectingAnUpdatedDictionaryOfWordFrequencyWhenCalledWithDictionaryToUpdateAndIEnumerable() { var testInput = new List <string> { "this", "sample" }; IDictionary <string, int> dictToUpdate = new Dictionary <string, int> { { "dummy", 1 }, { "sample", 1 } }; var updatedDict = Analyzer.AddWordCountInDictionary(dictToUpdate, testInput); Assert.True(updatedDict["this"] == 1); Assert.True(updatedDict["sample"] == 2); }