public void Test_to_gas_from_celsius_throws_out_of_range_exception_too_high()
{
// Arrange.
var input = new CelsiusString("271");
// Act.
var result = Assert.Throws <ArgumentOutOfRangeException>(() => input.ToGas());
// Assert.
result.Message.Should().Contain("Temp too high for gas mark!");
}
public void Test_to_gas_from_celsius_returns_correct_value()
{
// Arrange.
const string expected = "6";
var input = new CelsiusString("200");
// Act.
var result = input.ToGas();
// Assert.
result.Should().Be(expected);
}