public void Test_to_celsius_from_gas_returns_correct_value(double input, double expected)
{
// Arrange.
var inputGas = new GasDouble(input);
// Act.
var result = inputGas.ToCelsius();
// Assert.
result.Should().Be(expected);
}
public void Test_to_celsius_from_gas_with_invalid_parameters_throws_argument_out_of_range_exception(double input)
{
// Arrange.
var inputGas = new GasDouble(input);
// Act.
var result = Assert.Throws <ArgumentOutOfRangeException>(() => inputGas.ToCelsius());
// Assert.
result.Message.Should().Contain("Temp too low or too high for gas mark!");
}
