public void Test_CountCharOccurences_CorrectlyCountsOccurencesOfEachCharacterInAString_WhenCalled()
{
// Arrange
// Arrange
StringSorter sorter = new StringSorter();
string message = "ddfffabb";
int dExpected = 2, fExpected = 3, aExpected = 1, bExpected = 2;
// Act
Dictionary <char, int> dictionaryResult = sorter.CountCharOccurences(message);
int aResult, bResult, dResult, fResult;
dictionaryResult.TryGetValue('a', out aResult);
dictionaryResult.TryGetValue('b', out bResult);
dictionaryResult.TryGetValue('d', out dResult);
dictionaryResult.TryGetValue('f', out fResult);
// Assert
Assert.AreEqual(aExpected, aResult);
Assert.AreEqual(bExpected, bResult);
Assert.AreEqual(dExpected, dResult);
Assert.AreEqual(fExpected, fResult);
}