public void EmptyStringIsDeserializedIntoNullValue()
{
NullableEnumConverter <HttpStatusCode> converter = new NullableEnumConverter <HttpStatusCode>();
string text = "";
HttpStatusCode?code = converter.Deserialize(text.AsMemory(), CultureInfo.InvariantCulture, null);
code.Should().BeNull();
}
public void NullableEnumDeserializerIsValid()
{
NullableEnumConverter <HttpStatusCode> converter = new NullableEnumConverter <HttpStatusCode>();
string text = "NotFound";
HttpStatusCode?code = converter.Deserialize(text.AsMemory(), CultureInfo.InvariantCulture, null);
code.Should().Be(HttpStatusCode.NotFound);
}
public void NullValueIsSerializedIntoEmptyString()
{
NullableEnumConverter <HttpStatusCode> converter = new NullableEnumConverter <HttpStatusCode>();
HttpStatusCode?code = null;
StringBuilder stringBuilder = new StringBuilder();
converter.AppendToStringBuilder(stringBuilder, CultureInfo.InvariantCulture, code, null, ',');
string serialized = stringBuilder.ToString();
serialized.Should().Be("");
}
public void CanConvertTo_DestinationTypeIsString_ReturnsTrue()
{
// Setup
var converter = new NullableEnumConverter(typeof(SimpleEnum?));
// Call
bool canConvert = converter.CanConvertTo(typeof(string));
// Assert
Assert.IsTrue(canConvert);
}
public void CanConvertTo_DestinationTypeIsInvalid_ReturnsFalse()
{
// Setup
var converter = new NullableEnumConverter(typeof(SimpleEnum?));
// Call
bool canConvert = converter.CanConvertTo(typeof(NotSupportedType));
// Assert
Assert.IsFalse(canConvert);
}
public void DefaultConstructor_ExpectedValues()
{
// Call
Type nullableType = typeof(SimpleEnum?);
var converter = new NullableEnumConverter(nullableType);
// Assert
Assert.IsInstanceOf <NullableConverter>(converter);
Assert.AreEqual(nullableType, converter.NullableType);
Assert.AreEqual(typeof(SimpleEnum), converter.UnderlyingType);
}
public void ConvertFrom_ValueIsNull_ThrowsNotSupportedException()
{
// Setup
var converter = new NullableEnumConverter(typeof(SimpleEnum?));
// Call
TestDelegate test = () => converter.ConvertFrom(null);
// Assert
Assert.Throws <NotSupportedException>(test);
}
public void NullableEnumSerializerIsValid()
{
NullableEnumConverter <HttpStatusCode> converter = new NullableEnumConverter <HttpStatusCode>();
HttpStatusCode?code = HttpStatusCode.NotFound;
StringBuilder stringBuilder = new StringBuilder();
converter.AppendToStringBuilder(stringBuilder, CultureInfo.InvariantCulture, code, null, ',');
string serialized = stringBuilder.ToString();
serialized.Should().Be("NotFound");
}
public void ConvertTo_DestinationTypeIsInvalid_ThrowsNotSupportedException()
{
// Setup
const SimpleEnum enumValue = SimpleEnum.FirstValue;
var converter = new NullableEnumConverter(typeof(SimpleEnum?));
// Call
TestDelegate test = () => converter.ConvertTo(enumValue, typeof(NotSupportedType));
// Assert
Assert.Throws <NotSupportedException>(test);
}
public void ConvertTo_DestinationTypeIsNull_ThrowsArgumentNullException()
{
// Setup
const SimpleEnum enumValue = SimpleEnum.FirstValue;
var converter = new NullableEnumConverter(typeof(SimpleEnum?));
// Call
TestDelegate test = () => converter.ConvertTo(enumValue, null);
// Assert
Assert.Throws <ArgumentNullException>(test);
}
public void ConvertTo_ValueIsOfInvalidType_ThrowsNotSupportedException()
{
// Setup
var notSupportedValue = new NotSupportedType();
var converter = new NullableEnumConverter(typeof(SimpleEnum?));
// Call
TestDelegate test = () => converter.ConvertTo(notSupportedValue, typeof(SimpleEnum));
// Assert
Assert.Throws <NotSupportedException>(test);
}
public void ConvertTo_ValueIsNull_DoesNotThrowException()
{
// Setup
var converter = new NullableEnumConverter(typeof(SimpleEnum?));
// Call
var result = new object();
TestDelegate test = () => result = converter.ConvertTo(null, typeof(string));
// Assert
Assert.DoesNotThrow(test);
Assert.AreEqual(string.Empty, result);
}
public void GetStandardValues_ITypeDescriptorContextIsNull_ReturnEnumValues()
{
// Setup
var converter = new NullableEnumConverter(typeof(SimpleEnum?));
// Call
TypeConverter.StandardValuesCollection result = converter.GetStandardValues(null);
// Assert
Assert.IsNotNull(result);
Assert.AreEqual(2, result.Count);
Assert.AreEqual(SimpleEnum.FirstValue, result[0]);
Assert.AreEqual(SimpleEnum.SecondValue, result[1]);
}
public void ConvertFrom_ValueIsString_ReturnsExpectedEnum()
{
// Setup
const string second = "<second>";
var converter = new NullableEnumConverter(typeof(SimpleEnum?));
// Call
object result = converter.ConvertFrom(second);
// Assert
const SimpleEnum expectedEnumValue = SimpleEnum.SecondValue;
Assert.AreEqual(expectedEnumValue, result);
}
public void ConvertTo_DestinationTypeIsString_ReturnsExpectedEnumDisplayName()
{
// Setup
const SimpleEnum enumValue = SimpleEnum.FirstValue;
var converter = new NullableEnumConverter(typeof(SimpleEnum?));
// Call
object result = converter.ConvertTo(enumValue, typeof(string));
// Assert
const string expectedText = "<first>";
Assert.AreEqual(expectedText, result);
}
public void ConvertNullableEnumUsingDefaultRepresent()
{
Assert.IsTrue(NullableEnumConverter.IsNullableEnum(typeof(TestEnum?)));
TestEnum?origin = TestEnum.Enum2;
var converted = ConvertNullable(origin);
Assert.IsNotNull(converted);
Assert.AreEqual(origin, converted);
var nil = ConvertNullable <TestEnum?>(null);
Assert.IsNull(nil);
}
public void EmittedDeserializerIsValid()
{
NullableEnumConverter <HttpStatusCode> converter = new NullableEnumConverter <HttpStatusCode>();
string text = "NotFound";
DynamicMethod deserialize = new DynamicMethod("Deserialize", typeof(HttpStatusCode?), new Type[] { typeof(ReadOnlyMemory <char>), typeof(IFormatProvider) }, typeof(NullableEnumConverterTests));
deserialize.GetILGenerator()
.DeclareLocal <HttpStatusCode?>(out LocalBuilder nullableLocal)
.DeclareLocal <string>(out LocalBuilder secondaryLocal)
.Ldarga_S(0)
.Emit(gen => converter.EmitDeserialize(gen, nullableLocal, secondaryLocal, null))
.Ret();
HttpStatusCode?code = (HttpStatusCode?)deserialize.Invoke(this, new object?[] { text.AsMemory(), CultureInfo.InvariantCulture }) !;
code.Should().Be(HttpStatusCode.NotFound);
}
public void EmittedSerializerSerializesNullValueIntoEmptyString()
{
NullableEnumConverter <HttpStatusCode> converter = new NullableEnumConverter <HttpStatusCode>();
HttpStatusCode?code = null;
DynamicMethod serialize = new DynamicMethod("Serialize", typeof(string), new Type[] { typeof(HttpStatusCode?), typeof(IFormatProvider), typeof(char) }, typeof(NullableEnumConverterTests));
serialize.GetILGenerator()
.DeclareLocal <HttpStatusCode?>(out LocalBuilder nullableLocal)
.Newobj <StringBuilder>()
.Ldarg_0()
.Emit(gen => converter.EmitAppendToStringBuilder(gen, nullableLocal, null, null))
.Callvirt <StringBuilder>("ToString")
.Ret();
string serialized = (string)serialize.Invoke(null, new object?[] { code, CultureInfo.InvariantCulture, ',' }) !;
serialized.Should().Be("");
}
protected override void Parse(EnumConvertionAttribute attribute, TypeMetadata typeMetadata, MemberMetadata memberMetadata)
{
if (attribute != null)
{
if ((memberMetadata.Attributes & MemberAttributes.Unmappable) == MemberAttributes.Unmappable)
throw new OhmSharpInvalidSchemaException(typeMetadata.Type, memberMetadata.Name,
string.Format("Member {0} of {1} cannot be marked with EnumConvertion.", memberMetadata.Name, typeMetadata.Type.FullName));
if ((memberMetadata.Attributes & MemberAttributes.Ignored) == MemberAttributes.Ignored)
throw new OhmSharpInvalidSchemaException(typeMetadata.Type, memberMetadata.Name,
string.Format("Member {0} of {1} cannot be marked with both EnumConvertion and MappingIgnore.", memberMetadata.Name, typeMetadata.Type.FullName));
if (!EnumConverter.IsEnum(memberMetadata.Type) && !NullableEnumConverter.IsNullableEnum(memberMetadata.Type))
throw new OhmSharpInvalidSchemaException(typeMetadata.Type,
string.Format("Member {0} of {1} not of type Enum cannot be marked with EnumConvertion.", memberMetadata.Name, typeMetadata.Type.FullName));
memberMetadata.Attributes |= MemberAttributes.Mapped;
memberMetadata.FormatProvider = attribute.ConvertionInfo;
}
}
public void GetStandardValues_ITypeDescriptorContext_ReturnEnumValues()
{
// Setup
var mockRepository = new MockRepository();
var typeDescriptorContext = mockRepository.Stub <ITypeDescriptorContext>();
mockRepository.ReplayAll();
var converter = new NullableEnumConverter(typeof(SimpleEnum?));
// Call
TypeConverter.StandardValuesCollection result = converter.GetStandardValues(typeDescriptorContext);
// Assert
Assert.IsNotNull(result);
Assert.AreEqual(2, result.Count);
Assert.AreEqual(SimpleEnum.FirstValue, result[0]);
Assert.AreEqual(SimpleEnum.SecondValue, result[1]);
mockRepository.VerifyAll();
}
private T ConvertNullable <T>(T origin)
{
var redisVal = NullableEnumConverter.ConvertTo(origin, typeof(T), null);
return((T)NullableEnumConverter.ConvertFrom(redisVal, typeof(T), null));
}
public void TryCreateReturnsInstanceForEnumType()
{
NullableEnumConverter <DayOfWeek?> .TryCreate(out _).ShouldBeTrue();
}
public void TryCreateReturnsFalseForNonNullableTypeReturnsFalse()
{
NullableEnumConverter <int> .TryCreate(out _).ShouldBeFalse();
}
public void TryCreateReturnsFalseForNonEnumUnderlyingType()
{
NullableEnumConverter <int?> .TryCreate(out _).ShouldBeFalse();
}