public void Test_ValidateLowerCase() { // Arrange var input = "war and peace"; var expectedValue = true; var input1 = "war#@! and peace122"; var expectedValue1 = true; // Act var result = UtilityHelper.CheckLowerCase(input); var result1 = UtilityHelper.CheckLowerCase(input1); // Assert Assert.Equal(expectedValue, result); Assert.Equal(expectedValue1, result1); }