public void AppliesLettersCorrectly()
{
var phrase = new Phrase("TEST");
Assert.Equal("____", phrase.Current);
Assert.Equal(0, phrase.ApplyLetter('A'));
Assert.Equal("____", phrase.Current);
Assert.Equal(0, phrase.ApplyLetter('B'));
Assert.Equal("____", phrase.Current);
Assert.Equal(0, phrase.ApplyLetter('Z'));
Assert.Equal("____", phrase.Current);
Assert.Equal(0, phrase.ApplyLetter('Z'));
Assert.Equal("____", phrase.Current);
Assert.Equal(1, phrase.ApplyLetter('E'));
Assert.Equal("_E__", phrase.Current);
Assert.Equal(0, phrase.ApplyLetter('K'));
Assert.Equal("_E__", phrase.Current);
Assert.Equal(0, phrase.ApplyLetter('K'));
Assert.Equal("_E__", phrase.Current);
Assert.Equal(1, phrase.ApplyLetter('S'));
Assert.Equal("_ES_", phrase.Current);
Assert.Equal(2, phrase.ApplyLetter('T'));
Assert.Equal("TEST", phrase.Current);
Assert.Equal(0, phrase.ApplyLetter('Z'));
Assert.Equal("TEST", phrase.Current);
Assert.Equal(0, phrase.ApplyLetter('E'));
Assert.Equal("TEST", phrase.Current);
Assert.Equal(0, phrase.ApplyLetter('S'));
Assert.Equal("TEST", phrase.Current);
Assert.Equal(0, phrase.ApplyLetter('T'));
Assert.Equal("TEST", phrase.Current);
}
