public void Left_WithSentenceStringAndZeroLength_ExpectsEmptyString() => Equal(SENTENCE.Left(0), EMPTY);
public void Left_WithSentenceStringAndNegativeWordLength_ExpectsAllButLastWord() => Equal(SENTENCE.Left(-LENGTH_WORD), WORD_FIRST + WORD_SEPARATOR);
public void Left_WithSentenceStringAndNegativeGreaterLength_ExpectsSameString() => Equal(SENTENCE.Left(-LENGTH_GREATER), SENTENCE);
public void Left_WithSentenceStringAndPositiveWordLength_ExpectsFirstWord() => Equal(SENTENCE.Left(LENGTH_WORD), WORD_FIRST);