public void Number_Method()
{
Assert.Throws<ArgumentNullException>(() => new LawsLawApiCall().Number(null));
Assert.Throws<ArgumentException>(() => new LawsLawApiCall().Number(string.Empty));
var call = new LawsLawApiCall();
Assert.False(call.Parameters.ContainsKey("number"));
Assert.True(ReferenceEquals(call.Number("number"), call));
Assert.Equal("number", call.Parameters["number"]);
}