/// <summary>
 /// Converts the Double input to the correct double value.
 /// </summary>
 /// <typeparam name="TInput"> The temperature type to be converted to. </typeparam>
 /// <param name="input"> The value to be converted. </param>
 /// <exception cref="ArgumentException"> The TInput type is not a valid type for this method. </exception>
 /// <returns>
 /// The result of the conversion.
 /// </returns>
 public static double To <TInput>(this DoubleBase input)
     where TInput : TemperatureBase
 {
     return(typeof(TInput).Name switch
     {
         nameof(Celsius) when input is CelsiusDouble castInput => CelsiusConverter.CelsiusToCelsius(castInput.Temperature),
         nameof(Celsius) when input is FahrenheitDouble castInput => FahrenheitConverter.FahrenheitToCelsius(castInput.Temperature),
         nameof(Celsius) when input is KelvinDouble castInput => KelvinConverter.KelvinToCelsius(castInput.Temperature),
         nameof(Celsius) when input is GasDouble castInput => GasConverter.GasToCelsius(castInput.Temperature),
         nameof(Celsius) when input is RankineDouble castInput => RankineConverter.RankineToCelsius(castInput.Temperature),
         nameof(Fahrenheit) when input is CelsiusDouble castInput => CelsiusConverter.CelsiusToFahrenheit(castInput.Temperature),
         nameof(Fahrenheit) when input is FahrenheitDouble castInput => FahrenheitConverter.FahrenheitToFahrenheit(castInput.Temperature),
         nameof(Fahrenheit) when input is KelvinDouble castInput => KelvinConverter.KelvinToFahrenheit(castInput.Temperature),
         nameof(Fahrenheit) when input is GasDouble castInput => GasConverter.GasToFahrenheit(castInput.Temperature),
         nameof(Fahrenheit) when input is RankineDouble castInput => RankineConverter.RankineToFahrenheit(castInput.Temperature),
         nameof(Kelvin) when input is CelsiusDouble castInput => CelsiusConverter.CelsiusToKelvin(castInput.Temperature),
         nameof(Kelvin) when input is FahrenheitDouble castInput => FahrenheitConverter.FahrenheitToKelvin(castInput.Temperature),
         nameof(Kelvin) when input is KelvinDouble castInput => KelvinConverter.KelvinToKelvin(castInput.Temperature),
         nameof(Kelvin) when input is GasDouble castInput => GasConverter.GasToKelvin(castInput.Temperature),
         nameof(Kelvin) when input is RankineDouble castInput => RankineConverter.RankineToKelvin(castInput.Temperature),
         nameof(Gas) when input is CelsiusDouble castInput => CelsiusConverter.CelsiusToGas(castInput.Temperature),
         nameof(Gas) when input is FahrenheitDouble castInput => FahrenheitConverter.FahrenheitToGas(castInput.Temperature),
         nameof(Gas) when input is KelvinDouble castInput => KelvinConverter.KelvinToGas(castInput.Temperature),
         nameof(Gas) when input is GasDouble castInput => GasConverter.GasToGas(castInput.Temperature),
         nameof(Gas) when input is RankineDouble castInput => RankineConverter.RankineToGas(castInput.Temperature),
         nameof(Rankine) when input is CelsiusDouble castInput => CelsiusConverter.CelsiusToRankine(castInput.Temperature),
         nameof(Rankine) when input is FahrenheitDouble castInput => FahrenheitConverter.FahrenheitToRankine(castInput.Temperature),
         nameof(Rankine) when input is KelvinDouble castInput => KelvinConverter.KelvinToRankine(castInput.Temperature),
         nameof(Rankine) when input is GasDouble castInput => GasConverter.GasToRankine(castInput.Temperature),
         nameof(Rankine) when input is RankineDouble castInput => RankineConverter.RankineToRankine(castInput.Temperature),
         _ => throw new ArgumentException($"Invalid type: {typeof(TInput).Name}")
     });
        public void Test_to_gas_from_celsius_generic_with_invalid_parameters_throws_argument_out_of_range_exception(double input, string expectedErrorMessage)
        {
            // Arrange.
            var inputGas = new CelsiusDouble(input);

            // Act.
            var result = Assert.Throws <ArgumentOutOfRangeException>(() => inputGas.To <Gas>());

            // Assert.
            result.Message.Should().Contain(expectedErrorMessage);
        }
        public void Test_to_rankine_generic_from_celsius_with_invalid_parameter_throws_exception(double input)
        {
            // Arrange.
            var inputCelsius = new CelsiusDouble(input);

            // Act.
            var result = Assert.Throws <ArgumentOutOfRangeException>(() => inputCelsius.To <Rankine>());

            // Assert.
            result.Message.Should().Contain("Value out of range for type.");
        }
        public void Test_to_gas_from_celsius_generic_returns_correct_value(double input, double expected)
        {
            // Arrange.
            var inputCelsius = new CelsiusDouble(input);

            // Act.
            var result = inputCelsius.To <Gas>();

            // Assert.
            result.Should().Be(expected);
        }
        public void Test_to_celsius_generic_from_celsius_returns_same_value()
        {
            // Arrange.
            var input = new CelsiusDouble(42.3d);

            // Act.
            var result = input.To <Celsius>();

            // Assert.
            result.Should().Be(input.Temperature);
        }
        public void Test_to_rankine_generic_from_celsius_returns_correct_value()
        {
            // Arrange.
            const double expected = 851.6699999999998d;
            var          input    = new CelsiusDouble(200);

            // Act.
            var result = input.To <Rankine>();

            // Assert.
            result.Should().Be(expected);
        }
        public void Test_to_kelvin_generic_from_celsius_returns_correct_value()
        {
            // Arrange.
            const double expected = 473.15d;
            var          input    = new CelsiusDouble(200);

            // Act.
            var result = input.To <Kelvin>();

            // Assert.
            result.Should().Be(expected);
        }
        public void Test_to_fahrenheit_generic_from_celsius_returns_correct_value()
        {
            // Arrange.
            const double expected = 53.6d;
            var          input    = new CelsiusDouble(12);

            // Act.
            var result = input.To <Fahrenheit>();

            // Assert.
            result.Should().Be(expected);
        }
 /// <summary>
 /// Converts the Celsius <paramref name="input"/> to FahrenheitConverter
 /// </summary>
 /// <param name="input"> The value to be converted. </param>
 /// <exception cref="T:System.ArgumentOutOfRangeException">If calculated value is beyond the limits of the type.</exception>
 /// <returns>
 /// The FahrenheitConverter <see langword="double"/> result.
 /// </returns>
 public static double ToFahrenheit(this CelsiusDouble input)
 {
     return(CelsiusConverter.CelsiusToFahrenheit(input.Temperature));
 }
 /// <summary>
 /// Converts the Celsius <paramref name="input"/> to Ranking
 /// </summary>
 /// <param name="input"> The value to be converted. </param>
 /// <returns>
 /// The RankineConverter <see langword="double"/> result.
 /// </returns>
 public static double ToRankine(this CelsiusDouble input)
 {
     return(CelsiusConverter.CelsiusToRankine(input.Temperature));
 }