public void SayHello_WithNoName_ReturnsCorrectGreeting(string name)
        {
            var greeter  = new GrumpyGreeter();
            var actual   = greeter.SayHello(name);
            var expected = "Get lost, loser.";

            Assert.Equal(expected, actual);
        }
        public void SayHello_WithName_ReturnsCorrectGreeting()
        {
            var greeter  = new GrumpyGreeter();
            var name     = "Foo";
            var expected = $"Get lost, {name}.";
            var actual   = greeter.SayHello(name);

            Assert.Equal(expected, actual);
        }