public void CompareStrings_WhenItReceivesTwoStrings_ItReturnsThemWhenTheyDiffer()
{
// Arrange
var expectedResult = "pear, peach\n";
// Act
var result = _comparer.CompareStrings("pear", "peach");
var result2 = _comparer.CompareStrings("banana", "banana");
// Assert
Assert.That(result, Is.EqualTo(expectedResult));
Assert.That(result2, Is.Empty);
}