public void WhenValueIsSetAndNoErrorMatch_ElseResultIsReturned()
{
var valueOrError = ValueOrError.WithValue("1");
var result = valueOrError.Match <int>().Error().Do(x => 2).Else(x => 3).Result();
AreEqual(3, result);
}
public void WhenValueIsSet_ValueSuppliedToFunction()
{
var valueOrError = ValueOrError.WithValue("1");
var result = valueOrError.Match <string>().Value().Do(s => "v" + s).Error().Do(s => "e" + s).Result();
AreEqual("v1", result);
}
public void WhenSome_SomeOfDoWithExpressionSupported()
{
var valueOrError = ValueOrError.WithValue("1");
var result = valueOrError.Match <int>().Value().Of("1").Do(1).Value().Do(2).Error().Do(3).Result();
AreEqual(1, result);
}
public void SameStringInOneValueOneError_AreNotEqual()
{
var a = ValueOrError.WithValue("1234");
var b = ValueOrError.WithError("1234");
IsFalse(a.Equals(b));
IsTrue(a != b);
}
public void ComparingValueWithNull_ResultsInNotEqual()
{
var a = ValueOrError.WithValue("1234");
IsFalse(a.Equals(null));
IsTrue(a != null);
IsTrue(null != a);
}
public void WhenSome_SomeWhereDoWithExpressionSupported()
{
var valueOrError = ValueOrError.WithValue("1");
var result = valueOrError.Match <int>()
.Value().Where(x => x == "1").Do(0).Value().Do(2).Error().Do(3).Result();
AreEqual(0, result);
}
public void ValueOrErrorWithValueWithNoMatchAndIgnoreElse_DoesNothing()
{
var value = ValueOrError.WithValue("test");
var result = false;
value.Match().Error().Do(x => result = true).IgnoreElse().Exec();
Assert.False(result);
}
public void WhenValueIsSet_ValueSuppliedToAction()
{
var valueOrError = ValueOrError.WithValue("x");
var value = string.Empty;
valueOrError.Match().Value().Do(s => value = s).Error().Do(_ => { }).Exec();
AreEqual("x", value);
}
public void WhenValueIsSetAndNoValueMatchForExec_ElseResultIsReturned()
{
var valueOrError = ValueOrError.WithValue("2");
var result = "0";
valueOrError.Match().Error().Do(x => result = x).Else(x => result = "1").Exec();
AreEqual("1", result);
}
public void SameValues_AreEqualAndHaveSameHashCode()
{
var a = ValueOrError.WithValue("1234");
var b = ValueOrError.WithValue("1234");
IsTrue(a.Equals(b));
IsTrue(a == b);
AreEqual(a.GetHashCode(), b.GetHashCode());
}
public void WhenValueIsSet_OnlyValueActionOccurs()
{
var valueOrError = ValueOrError.WithValue("x");
var valueSet = false;
var errorSet = false;
valueOrError.Match().Value().Do(_ => valueSet = true).Error().Do(_ => errorSet = true).Exec();
AreEqual(new[] { true, false }, new[] { valueSet, errorSet });
}
public void DifferentValues_AreNotEqualAndHaveDifferentHashCodes()
{
var a = ValueOrError.WithValue("1234");
var b = ValueOrError.WithValue("12345");
IsFalse(a.Equals(b));
IsTrue(a != b);
AreNotEqual(a.GetHashCode(), b.GetHashCode());
}
public void ConvertingValueToJsonAndBack_PreservesOptionState()
{
var settings = new JsonSerializerSettings();
settings.Converters.Add(new ValueOrErrorConverter());
var value = ValueOrError.WithValue("a");
var json = SerializeObject(value, settings);
var newValue = DeserializeObject <ValueOrError>(json, settings);
IsTrue(newValue.HasValue);
AreEqual("a", newValue.Value);
}
public void ConvertingValueToJsonAndBack_PreservesOptionState()
{
var settings = new JsonSerializerSettings
{
ContractResolver = SuccinctContractResolver.Instance
};
var value = ValueOrError.WithValue("a");
var json = SerializeObject(value, settings);
var newValue = DeserializeObject <ValueOrError>(json, settings);
IsTrue(newValue.HasValue);
AreEqual("a", newValue.Value);
}
public override object ReadJson(JsonReader reader,
Type objectType,
object existingValue,
JsonSerializer serializer)
{
var jsonObject = JObject.Load(reader);
var possibleValue = jsonObject.Properties().TryFirst(p => p.Name == "value");
var possibleError = jsonObject.Properties().TryFirst(p => p.Name == "error");
if (possibleValue.HasValue)
{
return(ValueOrError.WithValue(possibleValue.Value.ToObject <string>()));
}
if (possibleError.HasValue)
{
return(ValueOrError.WithError(possibleError.Value.ToObject <string>()));
}
throw new JsonSerializationException(
"Cannot deserialize a ValueOrError that contains neither a value or an error");
}
public void WhenValueIsSetAndNoValueMatchDefinedForExec_ExceptionThrown()
{
var valueOrError = ValueOrError.WithValue("1");
Throws <NoMatchException>(() => valueOrError.Match().Error().Do(x => { }).Exec());
}
public void WhenValueIsSetAndNoValueMatchDefined_ExceptionThrown()
{
var valueOrError = ValueOrError.WithValue("1");
Throws <NoMatchException>(() => valueOrError.Match <int>().Error().Do(x => 2).Result());
}
public void WhenValueIsSet_AccessingErrorCausesException()
{
var valueOrError = ValueOrError.WithValue("2");
Throws <InvalidOperationException>(() => Ignore(valueOrError.Error));
}
public void WhenValueIsSet_ValueCanBeAccessed()
{
var valueOrError = ValueOrError.WithValue("1");
AreEqual("1", valueOrError.Value);
}
public void WhenValueIsSet_HasValueIsTrue()
{
var valueOrError = ValueOrError.WithValue("1");
IsTrue(valueOrError.HasValue);
}
public void IntPrefexReturnsNone_IfFollowedByJunk()
{
var result = ValueOrErrorExamples.IntParser(ValueOrError.WithValue("Int:no number here"));
IsFalse(result.HasValue);
}
public void ValueOtherThanIntPrefex_ReturnsNone()
{
var result = ValueOrErrorExamples.IntParser(ValueOrError.WithValue("xxx"));
IsFalse(result.HasValue);
}
public void CreatingWithNullValue_CausesNullException()
{
Throws <ArgumentNullException>(() => ValueOrError.WithValue(null));
}
public void IntPrefex_ReturnsInt()
{
var result = ValueOrErrorExamples.IntParser(ValueOrError.WithValue("Int:6"));
AreEqual(6, result.Value);
}
public void WhenValueIsSet_PrintStringYieldsValue()
{
var valueOrError = ValueOrError.WithValue("42");
AreEqual("Value of 42", valueOrError.ToString());
}