public void CompareItemLengths_WhenItReceivesTwoIntegers_ItReturnsThenWhenTheyDiffer() { // Arrange var expectedResult = "3, 5\n"; // Act var result = _comparer.CompareItemLengths(3, 5); var result2 = _comparer.CompareItemLengths(7, 7); // Assert Assert.That(result, Is.EqualTo(expectedResult)); Assert.That(result2, Is.Empty); }