public void EnumParsing_WithoutExtensions()
{
// Note that you can't parse directly to the property. You need
// to use temporary variables. Consider this method an example of
// steps you'd normally take when parsing enums.
RandomModelObject obj = new RandomModelObject();
AnimalTypeEnum tmpAnimalEnum = AnimalTypeEnum.Bird;
Enum.TryParse <AnimalTypeEnum>("Cat", out tmpAnimalEnum);
obj.NonNullableEnum = tmpAnimalEnum;
Assert.AreEqual(AnimalTypeEnum.Cat, obj.NonNullableEnum, "Should have parsed to Cat type. ('Cat')");
Enum.TryParse <AnimalTypeEnum>("3", out tmpAnimalEnum); // we can also parse with values.
obj.NonNullableEnum = tmpAnimalEnum;
Assert.AreEqual(AnimalTypeEnum.Dog, obj.NonNullableEnum, "Should have parsed to Dog type.('3')");
// For nullable values this can get annoying. A one-liner would be nice.
AnimalTypeEnum tmpAnimalEnum2;
if (Enum.TryParse <AnimalTypeEnum>("Dog", out tmpAnimalEnum))
{
obj.NullableEnum = tmpAnimalEnum;
}
else
{
obj.NullableEnum = null;
}
Assert.AreEqual(AnimalTypeEnum.Dog, obj.NullableEnum, "Should have parsed to nullable Dog type.");
}
public void EnumParsing_WithExtensions()
{
// Thanks to the one-liner, you can parse right to the property.
RandomModelObject obj = new RandomModelObject()
{
NonNullableEnum = "Cat".ToNullable <AnimalTypeEnum>() ?? AnimalTypeEnum.Bird,
NullableEnum = "3".ToNullable <AnimalTypeEnum>() // Should be the dog type.
};
Assert.AreEqual(AnimalTypeEnum.Cat, obj.NonNullableEnum, "Should be parsed to Cat type. ('Cat')");
Assert.AreEqual(AnimalTypeEnum.Dog, obj.NullableEnum, "Should be parsed to Dog type.('Dog')");
// These will fail to parse and will return null.
Assert.IsNull("This won't parse".ToNullable <AnimalTypeEnum>(), "Note that bad inputs from forms will be handled just fine.");
Assert.IsNull("".ToNullable <AnimalTypeEnum>(), "Note that bad inputs from forms will be handled just fine.");
}