public void WhenCharDoesNotExist_ShouldNotChangeString()
            {
                var classUnderTest = new ReplaceCharSpaceCommand('-');

                classUnderTest.Execute("my original string");

                Assert.That(classUnderTest.Result, Is.EqualTo("my original string"));
            }
            public void WhenCharExists_ShouldReplaceWithSpace()
            {
                var classUnderTest = new ReplaceCharSpaceCommand('-');

                classUnderTest.Execute("my-original-string");

                Assert.That(classUnderTest.Result, Is.EqualTo("my original string"));
            }