public MainViewModel()
{
TextNotifyingProperty = new NotifyingProperty <string>();
TextValidatingNotifyingProperty = new ValidatingNotifyingProperty <string>("", true, new Dictionary <string, Func <string, bool> >
{
{ "Can not be empty", v => v.Length == 0 },
{ "Can not be more than six characters", v => v.Length > 6 }
});
}
public void ValidatingNotifyingProperty_ctr_IntitalValueShouldNotCauseValidationIfParameterIsFalse()
{
var property = new ValidatingNotifyingProperty <string>(Initial, false,
new Dictionary <string, Func <string, bool> >
{
{ "Always returns error = true", value => value == Initial }
});
Assert.IsFalse(property.HasErrors);
}
public void ValidatingNotifyingProperty_ctr_IntitalValueShouldCauseValidationIfParameterIsTrue()
{
var property = new ValidatingNotifyingProperty <string>(Initial, true,
new Dictionary <string, Func <string, bool> >
{
{ "Implicit test if initial value was set correctly. Always returns error = true", value => value == Initial }
});
Assert.IsTrue(property.HasErrors);
}
public void ValidatingNotifyingProperty_AddValidationError_ShouldProvideValueToErrorMessage()
{
const string errorMessage = "The value {0} is not welcome here.";
var property = new ValidatingNotifyingProperty <string>(Initial, true,
new Dictionary <string, Func <string, bool> >
{
{ errorMessage, value => true }
});
Assert.AreEqual(string.Format(errorMessage, Initial), property.Errors[0]);
}
public void ValidatingNotifyingProperty_ErrorsChanged_ShouldRaiseErrorsChangedIfNewError()
{
var property = new ValidatingNotifyingProperty <string>(Initial, true,
new Dictionary <string, Func <string, bool> >
{
{ "The value is now the new value. How dare you!", value => value != Initial }
});
var raised = false;
property.ErrorsChanged += (s, e) => raised = true;
property.Value = "new value";
Assert.IsTrue(raised);
}
public void ValidatingNotifyingProperty_ErrorsChanged_ShouldRaiseErrorsChangedIfSameErrorsButValueChanged_NoErrors()
{
const string newvalue = "new value";
var property = new ValidatingNotifyingProperty <string>(Initial, true,
new Dictionary <string, Func <string, bool> >
{
{ "The value is not exactly like i want it to be.", value => value != Initial && value != newvalue }
});
Assert.IsFalse(property.HasErrors);
var raised = false;
property.ErrorsChanged += (s, e) => raised = true;
property.Value = newvalue;
Assert.IsFalse(property.HasErrors);
Assert.IsTrue(raised);
}
