public void RemoveRule_ThereAreTwoFailedRules_RemoveOne_ResultChangedShouldBeFiredWithNewResultStillInvalid()
{
// ARRANGE
var dummy = new DummyViewModel();
var validation = new ValidationHelper();
validation.AddRule(nameof(dummy.Foo), () => RuleResult.Invalid("error2"));
var invalidRule = validation.AddRule(nameof(dummy.Foo), () => RuleResult.Invalid("error"));
var validationResult = validation.ValidateAll();
Assert.False(validationResult.IsValid);
bool resultChangedEventFired = false;
validation.ResultChanged += (sender, args) =>
{
Assert.Equal(nameof(dummy.Foo), args.Target);
Assert.False(args.NewResult.IsValid);
resultChangedEventFired = true;
};
// ACT
validation.RemoveRule(invalidRule);
// VERIFY
Assert.True(resultChangedEventFired);
}
private void SetupValidation()
{
var validationRules = new ValidationHelper();
// Simple properties
validationRules.AddRule(nameof(StringProperty),
() =>
RuleResult.Assert(!string.IsNullOrEmpty(StringProperty),
"StringProperty cannot be null or empty string"));
validationRules.AddRule(nameof(IntProperty),
() => RuleResult.Assert(IntProperty > 0, "IntProperty should be greater than zero."));
// Dependant properties
validationRules.AddRule(nameof(RangeStart),
nameof(RangeEnd),
() => RuleResult.Assert(RangeEnd > RangeStart, "RangeEnd must be grater than RangeStart"));
// Long-running validation (simulates call to a web service or something)
validationRules.AddRule(
nameof(StringProperty2),
() =>
{
SyncValidationRuleExecutedAsyncroniouslyDelegate?.Invoke();
return(RuleResult.Assert(!string.IsNullOrEmpty(StringProperty2),
"StringProperty2 cannot be null or empty string"));
});
Validation = validationRules;
DataErrorInfoValidationAdapter = new NotifyDataErrorInfoAdapter(Validation);
}
public void Validate_MultipleRulesForSameTarget_DoesNotExecuteRulesIfPerviousFailed()
{
// ARRANGE
var validation = new ValidationHelper();
var dummy = new DummyViewModel();
bool firstRuleExecuted = false;
bool secondRuleExecuted = false;
validation.AddRule(nameof(dummy.Foo),
() =>
{
firstRuleExecuted = true;
return(RuleResult.Invalid("Error1"));
});
validation.AddRule(nameof(dummy.Foo),
() =>
{
secondRuleExecuted = true;
return(RuleResult.Invalid("Error2"));
});
// ACT
validation.ValidateAll();
// VERIFY
Assert.True(firstRuleExecuted, "First rule must have been executed");
Assert.False(secondRuleExecuted, "Second rule should not have been executed because first rule failed.");
}
public void RemoveAllRules_HadTwoNegativeRulesRegisteredForDifferentTargets_ResultChangedIsFiredForAllTargets()
{
// ARRANGE
var dummy = new DummyViewModel();
var validation = new ValidationHelper();
validation.AddRule(() => dummy.Foo, () => RuleResult.Invalid("error1"));
validation.AddRule(() => dummy.Bar, () => RuleResult.Invalid("error2"));
validation.ValidateAll();
int resultChangedFiredCount = 0;
validation.ResultChanged += (sender, args) =>
{
resultChangedFiredCount++;
};
// ACT
validation.RemoveAllRules();
// VERIFY
Assert.Equal(2, resultChangedFiredCount);
}
public void Validate_MultipleRulesForSameTarget_ClearsResultsBeforeValidation()
{
// ARRANGE
var validation = new ValidationHelper();
var dummy = new DummyViewModel();
RuleResult firstRuleResult = RuleResult.Valid();
RuleResult secondRuleResult = RuleResult.Invalid("Error2");
validation.AddRule(nameof(dummy.Foo),
() => { return(firstRuleResult); });
validation.AddRule(nameof(dummy.Foo),
() => { return(secondRuleResult); });
// ACT
validation.ValidateAll();
firstRuleResult = RuleResult.Invalid("Error1");
validation.ValidateAll();
// VERIFY
var result = validation.GetResult(nameof(dummy.Foo));
Assert.False(result.IsValid);
Assert.Equal(1, result.ErrorList.Count);
Assert.Equal("Error1", result.ErrorList[0].ErrorText);
}
public void ResultChanged_ValidateExecutedForSeveralRules_FiresForEachTarget()
{
// Arrange
var validation = new ValidationHelper();
var dummy = new DummyViewModel();
validation.AddRule(nameof(dummy.Foo),
() => RuleResult.Invalid("Error"));
validation.AddRule(nameof(dummy.Foo),
RuleResult.Valid);
validation.AddRule(nameof(dummy.Bar),
RuleResult.Valid);
validation.AddRule(() => RuleResult.Invalid("Error"));
const int expectedTimesToFire = 0 + 1 /*Invalid Foo*/ + 1 /* Invalid general target */;
var eventFiredTimes = 0;
validation.ResultChanged += (o, e) => { eventFiredTimes++; };
// Act
validation.ValidateAll();
// Verify
Assert.Equal(expectedTimesToFire, eventFiredTimes);
}
public void RemoveRule_ThisRuleHadValidationError_ResultChangedEventIsFiredForCorrectTargetAndTargetIsValid()
{
// ARRANGE
var validation = new ValidationHelper();
validation.AddRule(RuleResult.Valid);
var invalidRule = validation.AddRule("test_target", () => RuleResult.Invalid("error"));
var validationResult = validation.ValidateAll();
Assert.False(validationResult.IsValid);
bool resultChangedEventFired = false;
validation.ResultChanged += (sender, args) =>
{
Assert.Equal("test_target", args.Target);
Assert.True(args.NewResult.IsValid);
resultChangedEventFired = true;
};
// ACT
validation.RemoveRule(invalidRule);
// VERIFY
Assert.True(resultChangedEventFired);
}
public void CombineRuleResults_ResultContainsErrorsFromAllCombinedResults()
{
// Arrange
var validation = new ValidationHelper();
validation.AddRule(() =>
{
//var r1 = RuleResult.Invalid("Error1");
//var r2 = RuleResult.Valid();
//var r3 = RuleResult.Invalid("Error2");
return
(RuleResult.Assert(false, "Error1").Combine(
RuleResult.Assert(true, "Error0")).Combine(
RuleResult.Assert(false, "Error2")));
//return r1.Combine(r2).Combine(r3);
});
// Act
var result = validation.ValidateAll();
// Assert
Assert.False(result.IsValid, "The validation must fail");
Assert.Equal(2, result.ErrorList.Count);
Assert.True(result.ErrorList.Any(e => e.ErrorText == "Error1"));
Assert.True(result.ErrorList.Any(e => e.ErrorText == "Error2"));
}
public void CombineRuleResults_ResultContainsErrorsFromAllCombinedResults()
{
// Arrange
var validation = new ValidationHelper();
validation.AddRule(() =>
{
//var r1 = RuleResult.Invalid("Error1");
//var r2 = RuleResult.Valid();
//var r3 = RuleResult.Invalid("Error2");
return
RuleResult.Assert(false, "Error1").Combine(
RuleResult.Assert(true, "Error0")).Combine(
RuleResult.Assert(false, "Error2"));
//return r1.Combine(r2).Combine(r3);
});
// Act
var result = validation.ValidateAll();
// Assert
Assert.False(result.IsValid, "The validation must fail");
Assert.Equal(2, result.ErrorList.Count);
Assert.True(result.ErrorList.Any(e => e.ErrorText == "Error1"));
Assert.True(result.ErrorList.Any(e => e.ErrorText == "Error2"));
}
public void RemoveAllRules_HadTwoNegativeRulesRegistered_ValidationSucceds()
{
// ARRANGE
var validation = new ValidationHelper();
validation.AddRule(() => RuleResult.Invalid("error1"));
validation.AddRule(() => RuleResult.Invalid("error2"));
// ACT
validation.RemoveAllRules();
var validationResult = validation.ValidateAll();
// VERIFY
Assert.True(validationResult.IsValid, "Validation should not produce any errors after all rules were removed.");
}
public void SyncValidation_SeveralRulesForOneTarget_ValidWhenAllRulesAreValid()
{
var vm = new DummyViewModel();
var validation = new ValidationHelper();
validation.AddRule(vm, RuleResult.Valid);
validation.AddRule(vm, () => { return(RuleResult.Invalid("Rule 2 failed")); });
validation.AddRule(vm, RuleResult.Valid);
var r = validation.Validate(vm);
Assert.False(r.IsValid);
}
public void AsyncValidation_SyncRule_ExecutedAsyncroniously()
{
TestUtils.ExecuteWithDispatcher((dispatcher, completedAction) =>
{
var vm = new DummyViewModel();
vm.Foo = null;
var validation = new ValidationHelper();
validation.AddRule(() =>
{
Assert.False(dispatcher.Thread.ManagedThreadId == Thread.CurrentThread.ManagedThreadId,
"Rule must be executed in a background thread.");
if (string.IsNullOrEmpty(vm.Foo))
{
return(RuleResult.Invalid("Foo cannot be empty string."));
}
return(RuleResult.Valid());
});
validation.ValidateAllAsync().ContinueWith(r => completedAction());
});
}
private bool ValidateTokenAddress()
{
var validator = new ValidationHelper();
validator.AddRequiredRule(() => ContractAddress, "Token address is required.");
var resultOne = validator.ValidateAll();
if (!resultOne.IsValid)
{
Errors = resultOne.ErrorList;
return(resultOne.IsValid);
}
bool isValidAddress;
try
{
isValidAddress = new Regex("^(?=.{42}$)0x[a-fA-F0-9]*").IsMatch(ContractAddress);
}
catch (Exception e)
{
isValidAddress = false;
}
validator.AddRule(ContractAddress, () => RuleResult.Assert(isValidAddress, "Token address is not valid Ethereum smart contract address."));
var result = validator.ValidateAll();
Errors = result.ErrorList;
return(result.IsValid);
}
public static void AddErrors(this ValidationHelper validator, string target, List <string> errors)
{
errors?.ForEach(it =>
{
validator.AddRule(target, () => RuleResult.Invalid($"{target}: {it}"));
});
}
protected override void ConfigureValidationRules(ValidationHelper validationHelper)
{
validationHelper.AddRule(
() => Username,
() => !string.IsNullOrWhiteSpace(Password) && string.IsNullOrWhiteSpace(Username)
? RuleResult.Invalid("Username is required")
: RuleResult.Valid()
);
validationHelper.AddRule(
() => Password,
() => !string.IsNullOrWhiteSpace(Username) && string.IsNullOrWhiteSpace(Password)
? RuleResult.Invalid("Password is required")
: RuleResult.Valid()
);
}
private void ValidateTransaction()
{
try
{
this._amount = BigDecimal.Parse(this._amountString);
}
catch (Exception e)
{
this._amount = null;
}
var validator = new ValidationHelper();
validator.AddRequiredRule(() => ReceiverAddress, "Address receiver is required.");
validator.AddRequiredRule(() => _amount, "Valid amount is required.");
validator.AddRequiredRule(() => Token, "Select token to send.");
var resultTemp = validator.ValidateAll();
if (!resultTemp.IsValid)
{
Errors = resultTemp.ErrorList;
IsValid = resultTemp.IsValid;
return;
}
bool isValidAddress;
try
{
isValidAddress = new Regex("^(?=.{42}$)0x[a-zA-Z0-9]*").IsMatch(ReceiverAddress);
}
catch (Exception e)
{
isValidAddress = false;
}
validator.AddRule(ReceiverAddress, () => RuleResult.Assert(isValidAddress, "Receiver address is not valid Ethereum account address."));
validator.AddRule(Amount, () => RuleResult.Assert(this._amount > new BigDecimal(0), "Amount is zero."));
validator.AddRule(Amount, () => RuleResult.Assert(this._amount < Token.Balance, "You don't have enough funds."));
var result = validator.ValidateAll();
Errors = result.ErrorList;
IsValid = result.IsValid;
}
public void RemoveAllRules_HadTwoFailedRules_ErrorGetsRemovedAlso()
{
// ARRANGE
var validation = new ValidationHelper();
validation.AddRule(() => RuleResult.Invalid("error1"));
validation.AddRule(() => RuleResult.Invalid("error2"));
var validationResult = validation.ValidateAll();
// ACT
validation.RemoveAllRules();
validationResult = validation.GetResult();
// VERIFY
Assert.True(validationResult.IsValid, "Validation should not produce any errors after all rules were removed.");
}
public async void SyncValidation_RuleThrowsException_ExceptionIsPropogated()
{
// ARRANGE
var validator = new ValidationHelper();
validator.AddRule(() => { throw new InvalidOperationException("Test"); });
// ACT & VERIFY
await Assert.ThrowsAsync <ValidationException>(() => validator.ValidateAllAsync());
}
public void RemoveRule_ThisRuleHadValidationError_ErrorGetsRemovedAlso()
{
// ARRANGE
var validation = new ValidationHelper();
validation.AddRule(RuleResult.Valid);
var invalidRule = validation.AddRule(() => RuleResult.Invalid("error"));
var validationResult = validation.ValidateAll();
Assert.False(validationResult.IsValid);
// ACT
validation.RemoveRule(invalidRule);
validationResult = validation.GetResult();
// VERIFY
Assert.True(validationResult.IsValid);
}
public void Reset_AllTargetsBecomeValidAgain()
{
// ARRANGE
var dummy = new DummyViewModel();
var validation = new ValidationHelper();
validation.AddRule(nameof(dummy.Foo), () => RuleResult.Invalid("error1"));
validation.AddRule(nameof(dummy.Bar), () => RuleResult.Invalid("error2"));
validation.ValidateAll();
// ACT
validation.Reset();
// VERIFY
Assert.True(validation.GetResult().IsValid);
Assert.True(validation.GetResult(nameof(dummy.Foo)).IsValid);
Assert.True(validation.GetResult(nameof(dummy.Bar)).IsValid);
}
public void Validate_MultipleRulesForSameTarget_OptionToAllowValidationOnFailedTargetsIsSetForSpecificRule_ThatRuleIsExecuted()
{
// ARRANGE
var validation = new ValidationHelper();
var dummy = new DummyViewModel();
bool firstRuleExecuted = false;
bool secondRuleExecuted = false;
bool thirdRuleExecuted = false;
validation.AddRule(nameof(dummy.Foo),
() =>
{
firstRuleExecuted = true;
return(RuleResult.Invalid("Error1"));
});
validation.AddRule(nameof(dummy.Foo),
() =>
{
secondRuleExecuted = true;
return(RuleResult.Invalid("Error2"));
});
validation.AddRule(nameof(dummy.Foo),
() =>
{
thirdRuleExecuted = true;
return(RuleResult.Invalid("Error3"));
}).WithSettings(s => s.ExecuteOnAlreadyInvalidTarget = true);
// ACT
validation.ValidateAll();
// VERIFY
Assert.True(firstRuleExecuted, "First rule must have been executed");
Assert.False(secondRuleExecuted, "Second rule should not have been executed because first rule failed.");
Assert.True(thirdRuleExecuted, "Third rule should be executed because it is configured to be executed on already invalid target.");
}
public void Reset_ResultChangedFiresForInvalidTargets()
{
// ARRANGE
var dummy = new DummyViewModel();
var validation = new ValidationHelper();
validation.AddRule(RuleResult.Valid);
validation.AddRule(nameof(dummy.Foo), () => RuleResult.Invalid("error1"));
validation.AddRule(nameof(dummy.Bar), () => RuleResult.Invalid("error2"));
validation.ValidateAll();
bool eventFiredForFoo = false;
bool evernFiredForBar = false;
validation.ResultChanged += (sender, args) =>
{
if (Equals(args.Target, nameof(dummy.Foo)))
{
eventFiredForFoo = true;
}
else if (Equals(args.Target, nameof(dummy.Bar)))
{
evernFiredForBar = true;
}
else
{
Assert.False(true, "ResultChanged event fired for an unexpected target.");
}
Assert.True(args.NewResult.IsValid);
};
// ACT
validation.Reset();
// VERIFY
Assert.True(eventFiredForFoo);
Assert.True(evernFiredForBar);
}
public void RemoveRule_ReExecuteValidation_RemovedRuleDoesNotExecute()
{
// ARRANGE
var validation = new ValidationHelper();
validation.AddRule(RuleResult.Valid);
var invalidRule = validation.AddRule(() => RuleResult.Invalid("error"));
var validationResult = validation.ValidateAll();
Assert.False(validationResult.IsValid);
// ACT
validation.RemoveRule(invalidRule);
validationResult = validation.ValidateAll();
// VERIFY
Assert.True(validationResult.IsValid);
}
public void ResultChanged_RuleErrorsChangedButRuleValidityDidNotChange_EventStillFires()
{
// ARRANGE
var validation = new ValidationHelper();
var dummy = new DummyViewModel();
validation.AddRule(() => dummy.Foo,
() =>
{
if (string.IsNullOrEmpty(dummy.Foo))
{
return(RuleResult.Invalid("Foo should not be empty"));
}
return
(RuleResult.Assert(dummy.Foo.Length > 5, "Length must be greater than 5").Combine(
RuleResult.Assert(dummy.Foo.Any(Char.IsDigit), "Must contain digit")));
});
var resultChangedCalledTimes = 0;
const int expectedResultChangedCalls = 1 /* First invalid value */ + 1 /* Second invalid value */ + 1 /* Third invalid value */ + 1 /* Valid value */;
validation.ResultChanged += (o, e) =>
{
resultChangedCalledTimes++;
};
// ACT
dummy.Foo = null;
// Should generage "Foo should not be empty" error
validation.ValidateAll();
dummy.Foo = "123";
// Should generate the "Length must be greater than 5" error
validation.ValidateAll();
dummy.Foo = "sdfldlssd";
// Should generate the "Must contain digit" error
validation.ValidateAll();
dummy.Foo = "lsdklfjsld2342";
// Now should be valid
validation.ValidateAll();
// VERIFY
Assert.Equal(expectedResultChangedCalls, resultChangedCalledTimes);
}
private void ValidateToken()
{
var validator = new ValidationHelper();
validator.AddRequiredRule(() => TokenName, "Token name is required.");
validator.AddRequiredRule(() => TokenSymbol, "Token symbol is required.");
validator.AddRequiredRule(() => Decimals, "Token decimals is required.");
if (!string.IsNullOrWhiteSpace(Decimals))
{
var isValid = int.TryParse(Decimals, out int temp);
validator.AddRule(ContractAddress, () => RuleResult.Assert(temp >= 0, "Decimals must be greater than zero."));
validator.AddRule(ContractAddress, () => RuleResult.Assert(isValid, "Decimals must be valid number."));
}
var result = validator.ValidateAll();
Errors = result.ErrorList;
IsValid = result.IsValid;
}
public void Validate_ValidationResultIsValid_ToStringReturnsEmptyString()
{
// ARRANGE
var validation = new ValidationHelper();
validation.AddRule(RuleResult.Valid);
// ACT
var r = validation.ValidateAll();
// VERIFY
Assert.True(r.ToString() == string.Empty);
}
public void Validate_MultipleRulesForSameTarget_OptionToAllowValidationOnFailedTargetsIsSetGlobally_AllRulesAreExecuted()
{
// ARRANGE
var validation = new ValidationHelper(new ValidationSettings
{
DefaultRuleSettings = new ValidationRuleSettings
{
ExecuteOnAlreadyInvalidTarget = true
}
});
var dummy = new DummyViewModel();
bool firstRuleExecuted = false;
bool secondRuleExecuted = false;
validation.AddRule(nameof(dummy.Foo),
() =>
{
firstRuleExecuted = true;
return(RuleResult.Invalid("Error1"));
});
validation.AddRule(nameof(dummy.Foo),
() =>
{
secondRuleExecuted = true;
return(RuleResult.Invalid("Error2"));
});
// ACT
validation.ValidateAll();
// VERIFY
Assert.True(firstRuleExecuted, "First rule must have been executed");
Assert.True(secondRuleExecuted, "Second rule should be executed as well even though the target is already invalid.");
}
public void Validate_ThereAreAsyncRules_ThrowsException()
{
// ARRANGE
var validation = new ValidationHelper();
// Add a simple sync rule
validation.AddRule(RuleResult.Valid);
// Add an async rule
validation.AddAsyncRule(() => Task.Run(() => RuleResult.Invalid("Error")));
// ACT
Assert.Throws <InvalidOperationException>(() => { validation.ValidateAll(); });
}
public void AsyncValidation_MixedAsyncAndNotAsyncRules_AllExecutedBeforeValidationCompleted()
{
TestUtils.ExecuteWithDispatcher((dispatcher, completedAction) =>
{
var vm = new DummyViewModel();
var validation = new ValidationHelper();
bool rule1Executed = false;
validation.AddAsyncRule(vm, () =>
{
return(Task.Run(() =>
{
rule1Executed = true;
return RuleResult.Valid();
}));
});
bool rule2Executed = false;
validation.AddRule(vm, () =>
{
rule2Executed = true;
return(RuleResult.Valid());
});
bool rule3Executed = false;
validation.AddAsyncRule(vm, () =>
{
return(Task.Run(() =>
{
rule3Executed = true;
return RuleResult.Valid();
}));
});
validation.ValidateAllAsync().ContinueWith(r =>
{
Assert.True(rule1Executed);
Assert.True(rule2Executed);
Assert.True(rule3Executed);
Assert.True(r.Result.IsValid);
completedAction();
});
});
}
private bool ValidateMnemonicPhrase()
{
var validator = new ValidationHelper();
validator.AddRequiredRule(() => this.InputMnemonic, "Mnemonic phrase is required.");
foreach (var func in Validators)
{
validator.AddRule(nameof(this.InputMnemonic), () => RuleResult.Assert(func.Value(InputMnemonic), func.Key));
}
var result = validator.ValidateAll();
Errors = result.ErrorList;
return(result.IsValid);
}
private bool Validate()
{
ValidationHelper validator = new ValidationHelper();
validator.AddRequiredRule(() => ReminderDay, LocalizationManager.GetString("reminder_date_required"));
validator.AddRequiredRule(() => ReminderTime, LocalizationManager.GetString("reminder_time_required"));
validator.AddRequiredRule(() => SelectedReminder.Title, LocalizationManager.GetString("reminder_title_required"));
validator.AddRule("MinimumDate", () =>
{
bool condition = true;
if (_reminderDay.HasValue && !string.IsNullOrEmpty(_reminderTime))
{
var day = _reminderDay.Value;
var timeElements = _reminderTime.Split(':');
if (timeElements.Length >= 2)
{
int hour = -1, minute = -1;
if (int.TryParse(timeElements[0], out hour))
{
if (int.TryParse(timeElements[1], out minute))
{
DateTime newDate = new DateTime(day.Year, day.Month, day.Day, hour, minute, 0, DateTimeKind.Local);
newDate = newDate.ToUniversalTime();
long unixDateTime = ((DateTimeOffset)newDate).ToUnixTimeSeconds();
_selectedReminder.Date = unixDateTime;
condition = _selectedReminder.Date > ((DateTimeOffset)DateTime.UtcNow).ToUnixTimeSeconds();
}
}
}
}
return(RuleResult.Assert(condition, LocalizationManager.GetString("date_time_not_past_error")));
});
var result = validator.ValidateAll();
Errors = result.AsObservableDictionary();
return(result.IsValid);
}
public void SyncValidation_SeveralRulesForOneTarget_ValidWhenAllRulesAreValid()
{
var vm = new DummyViewModel();
var validation = new ValidationHelper();
validation.AddRule(vm, RuleResult.Valid);
validation.AddRule(vm, () =>
{
return RuleResult.Invalid("Rule 2 failed");
});
validation.AddRule(vm, RuleResult.Valid);
var r = validation.Validate(vm);
Assert.False(r.IsValid);
}
public void AsyncValidation_SyncRule_ExecutedAsyncroniously()
{
TestUtils.ExecuteWithDispatcher((dispatcher, completedAction) =>
{
var vm = new DummyViewModel();
vm.Foo = null;
var validation = new ValidationHelper();
validation.AddRule(() =>
{
Assert.False(dispatcher.Thread.ManagedThreadId == Thread.CurrentThread.ManagedThreadId,
"Rule must be executed in a background thread.");
if (string.IsNullOrEmpty(vm.Foo))
{
return RuleResult.Invalid("Foo cannot be empty string.");
}
return RuleResult.Valid();
});
validation.ValidateAllAsync().ContinueWith(r => completedAction());
});
}
public void ValidateAsync_MultipleRulesForSameTarget_DoesNotExecuteRulesIfPerviousFailed()
{
TestUtils.ExecuteWithDispatcher((uiThreadDispatcher, completedAction) =>
{
// ARRANGE
var validation = new ValidationHelper();
var dummy = new DummyViewModel();
bool firstRuleExecuted = false;
bool secondRuleExecuted = false;
validation.AddRule(() => dummy.Foo,
() =>
{
firstRuleExecuted = true;
return RuleResult.Invalid("Error1");
});
validation.AddAsyncRule(() => dummy.Foo,
onCompleted =>
{
secondRuleExecuted = true;
onCompleted(RuleResult.Invalid("Error2"));
});
// ACT
validation.ValidateAllAsync().ContinueWith(result =>
{
// VERIFY
Assert.True(firstRuleExecuted, "First rule must have been executed");
Assert.False(secondRuleExecuted, "Second rule should not have been executed because first rule failed.");
completedAction();
});
});
}
public void ValidationResultChanged_ValidateExecutedForOneRule_FiresOneTime()
{
// Arrange
var validation = new ValidationHelper();
var dummy = new DummyViewModel();
validation.AddRule(() => dummy.Foo,
() => RuleResult.Invalid("Error"));
var eventFiredTimes = 0;
validation.ResultChanged += (o, e) =>
{
eventFiredTimes++;
};
// Act
validation.ValidateAll();
// Verity
Assert.Equal(1, eventFiredTimes);
}
public void Reset_AllTargetsBecomeValidAgain()
{
// ARRANGE
var dummy = new DummyViewModel();
var validation = new ValidationHelper();
validation.AddRule(() => dummy.Foo, () => RuleResult.Invalid("error1"));
validation.AddRule(() => dummy.Bar, () => RuleResult.Invalid("error2"));
validation.ValidateAll();
// ACT
validation.Reset();
// VERIFY
Assert.True(validation.GetResult().IsValid);
Assert.True(validation.GetResult(() => dummy.Foo).IsValid);
Assert.True(validation.GetResult(() => dummy.Bar).IsValid);
}
public void RemoveAllRules_HadTwoNegativeRulesRegisteredForDifferentTargets_ResultChangedIsFiredForAllTargets()
{
// ARRANGE
var dummy = new DummyViewModel();
var validation = new ValidationHelper();
validation.AddRule(() => dummy.Foo, () => RuleResult.Invalid("error1"));
validation.AddRule(() => dummy.Bar, () => RuleResult.Invalid("error2"));
validation.ValidateAll();
int resultChangedFiredCount = 0;
validation.ResultChanged += (sender, args) =>
{
resultChangedFiredCount++;
};
// ACT
validation.RemoveAllRules();
// VERIFY
Assert.Equal(2, resultChangedFiredCount);
}
public void Validate_MultipleRulesForSameTarget_OptionToAllowValidationOnFailedTargetsIsSetForSpecificRule_ThatRuleIsExecuted()
{
// ARRANGE
var validation = new ValidationHelper();
var dummy = new DummyViewModel();
bool firstRuleExecuted = false;
bool secondRuleExecuted = false;
bool thirdRuleExecuted = false;
validation.AddRule(nameof(dummy.Foo),
() =>
{
firstRuleExecuted = true;
return RuleResult.Invalid("Error1");
});
validation.AddRule(nameof(dummy.Foo),
() =>
{
secondRuleExecuted = true;
return RuleResult.Invalid("Error2");
});
validation.AddRule(nameof(dummy.Foo),
() =>
{
thirdRuleExecuted = true;
return RuleResult.Invalid("Error3");
}).WithSettings(s => s.ExecuteOnAlreadyInvalidTarget = true);
// ACT
validation.ValidateAll();
// VERIFY
Assert.True(firstRuleExecuted, "First rule must have been executed");
Assert.False(secondRuleExecuted, "Second rule should not have been executed because first rule failed.");
Assert.True(thirdRuleExecuted, "Third rule should be executed because it is configured to be executed on already invalid target.");
}
public void Validate_MultipleRulesForSameTarget_OptionToAllowValidationOnFailedTargetsIsSetGlobally_AllRulesAreExecuted()
{
// ARRANGE
var validation = new ValidationHelper(new ValidationSettings
{
DefaultRuleSettings = new ValidationRuleSettings
{
ExecuteOnAlreadyInvalidTarget = true
}
});
var dummy = new DummyViewModel();
bool firstRuleExecuted = false;
bool secondRuleExecuted = false;
validation.AddRule(nameof(dummy.Foo),
() =>
{
firstRuleExecuted = true;
return RuleResult.Invalid("Error1");
});
validation.AddRule(nameof(dummy.Foo),
() =>
{
secondRuleExecuted = true;
return RuleResult.Invalid("Error2");
});
// ACT
validation.ValidateAll();
// VERIFY
Assert.True(firstRuleExecuted, "First rule must have been executed");
Assert.True(secondRuleExecuted, "Second rule should be executed as well even though the target is already invalid.");
}
public void ResultChanged_RuleErrorsChangedButRuleValidityDidNotChange_EventStillFires()
{
// ARRANGE
var validation = new ValidationHelper();
var dummy = new DummyViewModel();
validation.AddRule(() => dummy.Foo,
() =>
{
if (string.IsNullOrEmpty(dummy.Foo))
{
return RuleResult.Invalid("Foo should not be empty");
}
return
RuleResult.Assert(dummy.Foo.Length > 5, "Length must be greater than 5").Combine(
RuleResult.Assert(dummy.Foo.Any(Char.IsDigit), "Must contain digit"));
});
var resultChangedCalledTimes = 0;
const int expectedResultChangedCalls = 1 /* First invalid value */+ 1 /* Second invalid value */+ 1 /* Third invalid value */ + 1 /* Valid value */;
validation.ResultChanged += (o, e) =>
{
resultChangedCalledTimes++;
};
// ACT
dummy.Foo = null;
// Should generage "Foo should not be empty" error
validation.ValidateAll();
dummy.Foo = "123";
// Should generate the "Length must be greater than 5" error
validation.ValidateAll();
dummy.Foo = "sdfldlssd";
// Should generate the "Must contain digit" error
validation.ValidateAll();
dummy.Foo = "lsdklfjsld2342";
// Now should be valid
validation.ValidateAll();
// VERIFY
Assert.Equal(expectedResultChangedCalls, resultChangedCalledTimes);
}
public void ResultChanged_ValidateExecutedForSeveralRules_FiresForEachTarget()
{
// Arrange
var validation = new ValidationHelper();
var dummy = new DummyViewModel();
validation.AddRule(() => dummy.Foo,
() => RuleResult.Invalid("Error"));
validation.AddRule(() => dummy.Foo,
RuleResult.Valid);
validation.AddRule(() => dummy.Bar,
RuleResult.Valid);
validation.AddRule(() => RuleResult.Invalid("Error"));
const int expectedTimesToFire = 0 + 1 /*Invalid Foo*/+ 1 /* Invalid general target */;
var eventFiredTimes = 0;
validation.ResultChanged += (o, e) =>
{
eventFiredTimes++;
};
// Act
validation.ValidateAll();
// Verify
Assert.Equal(expectedTimesToFire, eventFiredTimes);
}
public void ValidateAllAsync_SimilteniousCalls_DoesNotFail()
{
TestUtils.ExecuteWithDispatcher((dispatcher, completedAction) =>
{
const int numThreadsPerIternation = 4;
const int iterationCount = 10;
const int numThreads = numThreadsPerIternation * iterationCount;
var resetEvent = new ManualResetEvent(false);
int toProcess = numThreads;
var validation = new ValidationHelper();
for (int i = 0; i < iterationCount; i++)
{
var target1 = new object();
var target2 = new object();
validation.AddAsyncRule(setResult =>
{
setResult(RuleResult.Invalid("Error1"));
});
validation.AddAsyncRule(target1, setResult =>
{
setResult(RuleResult.Valid());
});
validation.AddRule(target2, () =>
{
return RuleResult.Invalid("Error2");
});
validation.AddRule(target2, RuleResult.Valid);
Action<Action> testThreadBody = exercise =>
{
try
{
exercise();
if (Interlocked.Decrement(ref toProcess) == 0)
resetEvent.Set();
}
catch (Exception ex)
{
dispatcher.BeginInvoke(new Action(() =>
{
throw new AggregateException(ex);
}));
}
};
var thread1 = new Thread(() =>
{
testThreadBody(() =>
{
validation.ValidateAllAsync().Wait();
});
});
var thread2 = new Thread(() =>
{
testThreadBody(() =>
{
validation.ValidateAllAsync().Wait();
});
});
var thread3 = new Thread(() =>
{
testThreadBody(() =>
{
validation.Validate(target2);
});
});
var thread4 = new Thread(() =>
{
testThreadBody(() =>
{
validation.Validate(target2);
});
});
thread1.Start();
thread2.Start();
thread3.Start();
thread4.Start();
}
ThreadPool.QueueUserWorkItem(_ =>
{
resetEvent.WaitOne();
completedAction();
});
});
}
public void ResultChanged_CorrectingValidationError_EventIsFiredForWithValidResultAfterCorrection()
{
// ARRANGE
var validation = new ValidationHelper();
var dummy = new DummyViewModel();
var fooResult = RuleResult.Valid();
// ReSharper disable AccessToModifiedClosure // Intended
validation.AddRule(() => dummy.Foo, () => fooResult);
// ReSharper restore AccessToModifiedClosure
var onResultChanged = new Action<ValidationResultChangedEventArgs>(r => { });
// ReSharper disable AccessToModifiedClosure // Intended
validation.ResultChanged += (o, e) => onResultChanged(e);
// ReSharper restore AccessToModifiedClosure
// ACT & VERIFY
// First, verify that the event is fired with invalid result
fooResult = RuleResult.Invalid("Error");
onResultChanged = r =>
{
Assert.False(r.NewResult.IsValid, "ResultChanged must be fired with invalid result first.");
};
validation.ValidateAll();
// Second, verify that after second validation when error was corrected, the event fires with the valid result
fooResult = RuleResult.Valid();
onResultChanged = r =>
{
Assert.True(r.NewResult.IsValid, "ResultChanged must be fired with valid result after succesfull validation.");
};
validation.ValidateAll();
}
public void Reset_ResultChangedFiresForInvalidTargets()
{
// ARRANGE
var dummy = new DummyViewModel();
var validation = new ValidationHelper();
validation.AddRule(RuleResult.Valid);
validation.AddRule(() => dummy.Foo, () => RuleResult.Invalid("error1"));
validation.AddRule(() => dummy.Bar, () => RuleResult.Invalid("error2"));
validation.ValidateAll();
bool eventFiredForFoo = false;
bool evernFiredForBar = false;
validation.ResultChanged += (sender, args) =>
{
if (Equals(args.Target, PropertyName.For(() => dummy.Foo)))
{
eventFiredForFoo = true;
}
else if (Equals(args.Target, PropertyName.For(() => dummy.Bar)))
{
evernFiredForBar = true;
}
else
{
Assert.False(true, "ResultChanged event fired for an unexpected target.");
}
Assert.True(args.NewResult.IsValid);
};
// ACT
validation.Reset();
// VERIFY
Assert.True(eventFiredForFoo);
Assert.True(evernFiredForBar);
}
public void AsyncValidation_MixedAsyncAndNotAsyncRules_AllExecutedBeforeValidationCompleted()
{
TestUtils.ExecuteWithDispatcher((dispatcher, completedAction) =>
{
var vm = new DummyViewModel();
var validation = new ValidationHelper();
bool rule1Executed = false;
validation.AddAsyncRule(vm, setResultDelegate => ThreadPool.QueueUserWorkItem(_ =>
{
rule1Executed = true;
setResultDelegate(RuleResult.Valid());
}));
bool rule2Executed = false;
validation.AddRule(vm, () =>
{
rule2Executed = true;
return RuleResult.Valid();
});
bool rule3Executed = false;
validation.AddAsyncRule(vm, setResultDelegate => ThreadPool.QueueUserWorkItem(_ =>
{
rule3Executed = true;
setResultDelegate(RuleResult.Valid());
}));
validation.ValidateAllAsync().ContinueWith(r =>
{
Assert.True(rule1Executed);
Assert.True(rule2Executed);
Assert.True(rule3Executed);
Assert.True(r.Result.IsValid);
completedAction();
});
});
}
public void Validate_ThereAreAsyncRules_ThrowsException()
{
// ARRANGE
var validation = new ValidationHelper();
// Add a simple sync rule
validation.AddRule(RuleResult.Valid);
// Add an async rule
validation.AddAsyncRule(onCompleted => onCompleted(RuleResult.Invalid("Error")));
// ACT
Assert.Throws<InvalidOperationException>(() =>
{
validation.ValidateAll();
});
}
public void RemoveAllRules_HadTwoNegativeRulesRegistered_ValidationSucceds()
{
// ARRANGE
var validation = new ValidationHelper();
validation.AddRule(() => RuleResult.Invalid("error1"));
validation.AddRule(() => RuleResult.Invalid("error2"));
// ACT
validation.RemoveAllRules();
var validationResult = validation.ValidateAll();
// VERIFY
Assert.True(validationResult.IsValid, "Validation should not produce any errors after all rules were removed.");
}
public void Validate_ValidationResultIsValid_ToStringReturnsEmptyString()
{
// ARRANGE
var validation = new ValidationHelper();
validation.AddRule(RuleResult.Valid);
// ACT
var r = validation.ValidateAll();
// VERIFY
Assert.True(r.ToString() == string.Empty);
}
public void RemoveAllRules_HadTwoFailedRules_ErrorGetsRemovedAlso()
{
// ARRANGE
var validation = new ValidationHelper();
validation.AddRule(() => RuleResult.Invalid("error1"));
validation.AddRule(() => RuleResult.Invalid("error2"));
var validationResult = validation.ValidateAll();
// ACT
validation.RemoveAllRules();
validationResult = validation.GetResult();
// VERIFY
Assert.True(validationResult.IsValid, "Validation should not produce any errors after all rules were removed.");
}
public void ValidationCompleted_ValidateRuleWithMultipleTargets_ResultContainsErrorsForAllTargsts()
{
// Arrange
var validation = new ValidationHelper();
var dummy = new DummyViewModel();
validation.AddRule(() => dummy.Foo, () => dummy.Bar,
() =>
{
return RuleResult.Invalid("Error");
});
// Act
var result = validation.ValidateAll();
// Assert
Assert.False(result.IsValid);
Assert.True(result.ErrorList.Count == 2, "There must be two errors: one for each property target");
Assert.True(Equals(result.ErrorList[0].Target, "dummy.Foo"), "Target for the first error must be dummy.Foo");
Assert.True(Equals(result.ErrorList[1].Target, "dummy.Bar"), "Target for the second error must be dummy.Bar");
}
public void Validate_MultipleRulesForSameTarget_ClearsResultsBeforeValidation()
{
// ARRANGE
var validation = new ValidationHelper();
var dummy = new DummyViewModel();
RuleResult firstRuleResult = RuleResult.Valid();
RuleResult secondRuleResult = RuleResult.Invalid("Error2");
validation.AddRule(() => dummy.Foo,
() =>
{
return firstRuleResult;
});
validation.AddRule(() => dummy.Foo,
() =>
{
return secondRuleResult;
});
// ACT
validation.ValidateAll();
firstRuleResult = RuleResult.Invalid("Error1");
validation.ValidateAll();
// VERIFY
var result = validation.GetResult(() => dummy.Foo);
Assert.False(result.IsValid);
Assert.Equal(1, result.ErrorList.Count);
Assert.Equal("Error1", result.ErrorList[0].ErrorText);
}
public void RemoveRule_ThisRuleHadValidationError_ResultChangedEventIsFiredForCorrectTargetAndTargetIsValid()
{
// ARRANGE
var validation = new ValidationHelper();
validation.AddRule(RuleResult.Valid);
var invalidRule = validation.AddRule("test_target", () => RuleResult.Invalid("error"));
var validationResult = validation.ValidateAll();
Assert.False(validationResult.IsValid);
bool resultChangedEventFired = false;
validation.ResultChanged += (sender, args) =>
{
Assert.Equal("test_target", args.Target);
Assert.True(args.NewResult.IsValid);
resultChangedEventFired = true;
};
// ACT
validation.RemoveRule(invalidRule);
// VERIFY
Assert.True(resultChangedEventFired);
}
public void RemoveRule_ReExecuteValidation_RemovedRuleDoesNotExecute()
{
// ARRANGE
var validation = new ValidationHelper();
validation.AddRule(RuleResult.Valid);
var invalidRule = validation.AddRule(() => RuleResult.Invalid("error"));
var validationResult = validation.ValidateAll();
Assert.False(validationResult.IsValid);
// ACT
validation.RemoveRule(invalidRule);
validationResult = validation.ValidateAll();
// VERIFY
Assert.True(validationResult.IsValid);
}
public void Validate_MultipleRulesForSameTarget_DoesNotExecuteRulesIfPerviousFailed()
{
// ARRANGE
var validation = new ValidationHelper();
var dummy = new DummyViewModel();
bool firstRuleExecuted = false;
bool secondRuleExecuted = false;
validation.AddRule(() => dummy.Foo,
() =>
{
firstRuleExecuted = true;
return RuleResult.Invalid("Error1");
});
validation.AddRule(() => dummy.Foo,
() =>
{
secondRuleExecuted = true;
return RuleResult.Invalid("Error2");
});
// ACT
validation.ValidateAll();
// VERIFY
Assert.True(firstRuleExecuted, "First rule must have been executed");
Assert.False(secondRuleExecuted, "Second rule should not have been executed because first rule failed.");
}
public void RemoveRule_ThereAreTwoFailedRules_RemoveOne_ResultChangedShouldBeFiredWithNewResultStillInvalid()
{
// ARRANGE
var dummy = new DummyViewModel();
var validation = new ValidationHelper();
validation.AddRule(() => dummy.Foo, () => RuleResult.Invalid("error2"));
var invalidRule = validation.AddRule(() => dummy.Foo, () => RuleResult.Invalid("error"));
var validationResult = validation.ValidateAll();
Assert.False(validationResult.IsValid);
bool resultChangedEventFired = false;
validation.ResultChanged += (sender, args) =>
{
Assert.Equal(PropertyName.For(() => dummy.Foo), args.Target);
Assert.False(args.NewResult.IsValid);
resultChangedEventFired = true;
};
// ACT
validation.RemoveRule(invalidRule);
// VERIFY
Assert.True(resultChangedEventFired);
}
public void RemoveRule_ThisRuleHadValidationError_ErrorGetsRemovedAlso()
{
// ARRANGE
var validation = new ValidationHelper();
validation.AddRule(RuleResult.Valid);
var invalidRule = validation.AddRule(() => RuleResult.Invalid("error"));
var validationResult = validation.ValidateAll();
Assert.False(validationResult.IsValid);
// ACT
validation.RemoveRule(invalidRule);
validationResult = validation.GetResult();
// VERIFY
Assert.True(validationResult.IsValid);
}
private void SetupValidation()
{
var validationRules = new ValidationHelper();
// Simple properties
validationRules.AddRule(() => StringProperty,
() => { return RuleResult.Assert(!string.IsNullOrEmpty(StringProperty), "StringProperty cannot be null or empty string"); });
validationRules.AddRule(() => IntProperty,
() => { return RuleResult.Assert(IntProperty > 0, "IntProperty should be greater than zero."); });
// Dependant properties
validationRules.AddRule(() => RangeStart,
() => RangeEnd,
() =>
{
return RuleResult.Assert(RangeEnd > RangeStart, "RangeEnd must be grater than RangeStart");
});
// Long-running validation (simulates call to a web service or something)
validationRules.AddRule(
() => StringProperty2,
() =>
{
if (SyncValidationRuleExecutedAsyncroniouslyDelegate != null)
{
SyncValidationRuleExecutedAsyncroniouslyDelegate();
}
return RuleResult.Assert(!string.IsNullOrEmpty(StringProperty2), "StringProperty2 cannot be null or empty string");
});
Validation = validationRules;
DataErrorInfoValidationAdapter = new NotifyDataErrorInfoAdapter(Validation);
}
public void SyncValidation_RuleThrowsException_ExceptionIsPropogated()
{
// ARRANGE
var validator = new ValidationHelper();
validator.AddRule(() =>
{
throw new InvalidOperationException("Test");
});
// ACT & VERIFY
Assert.Throws<ValidationException>(validator.ValidateAllAsync());
}