/// <summary>
/// http://www.ecma-international.org/ecma-262/5.1/#sec-9.1
/// </summary>
/// <param name="input"></param>
/// <param name="preferredType"></param>
/// <returns></returns>
public static JsValue ToPrimitive(JsValue input, Types preferredType = Types.None)
{
if (input == Null.Instance || input == Undefined.Instance)
{
return input;
}
if (input.IsPrimitive())
{
return input;
}
return input.AsObject().DefaultValue(preferredType);
}
public void ShouldBeADate()
{
var value = new JsValue(new DateInstance(null));
Assert.Equal(false, value.IsBoolean());
Assert.Equal(false, value.IsArray());
Assert.Equal(true, value.IsDate());
Assert.Equal(false, value.IsNull());
Assert.Equal(false, value.IsNumber());
Assert.Equal(true, value.IsObject());
Assert.Equal(false, value.IsPrimitive());
Assert.Equal(false, value.IsRegExp());
Assert.Equal(false, value.IsString());
Assert.Equal(false, value.IsUndefined());
Assert.Equal(true, value.AsDate() != null);
}