public void When_DefaultValueProvider_Multiple_Registered_Overwrite()
{
bool GetDefaultValue(DependencyProperty property, out object value)
{
if (property == DefaultValueProviderSample.TestProperty)
{
value = 3;
return(true);
}
value = null;
return(false);
}
bool GetDefaultValue2(DependencyProperty property, out object value)
{
if (property == DefaultValueProviderSample.TestProperty)
{
value = 17;
return(true);
}
value = null;
return(false);
}
var test = new DefaultValueProviderSample();
test.RegisterDefaultValueProvider(GetDefaultValue);
test.RegisterDefaultValueProvider(GetDefaultValue2);
var value = test.GetPrecedenceSpecificValue(DefaultValueProviderSample.TestProperty, DependencyPropertyValuePrecedences.DefaultValue);
Assert.AreEqual(17, value);
}
public void When_DefaultValueProvider_Registered_Other_Property_Not_Affected()
{
var test = new DefaultValueProviderSample();
var value = test.GetPrecedenceSpecificValue(DefaultValueProviderSample.OtherProperty, DependencyPropertyValuePrecedences.DefaultValue);
Assert.AreEqual(0, value);
}
public void When_DefaultValueProvider_Registered_Provides_Value()
{
var test = new DefaultValueProviderSample();
var value = test.GetPrecedenceSpecificValue(DefaultValueProviderSample.TestProperty, DependencyPropertyValuePrecedences.DefaultValue);
Assert.AreEqual(3, value);
}
public void When_DefaultValueProvider_Registered_Other_Property_Not_Affected()
{
bool GetDefaultValue(DependencyProperty property, out object value)
{
if (property == DefaultValueProviderSample.TestProperty)
{
value = 3;
return(true);
}
value = 42; // Set arbitrary to verify false has effect
return(false);
}
var test = new DefaultValueProviderSample();
test.RegisterDefaultValueProvider(GetDefaultValue);
var value = test.GetPrecedenceSpecificValue(DefaultValueProviderSample.OtherProperty, DependencyPropertyValuePrecedences.DefaultValue);
Assert.AreEqual(0, value);
}
