public void CompareTemplateSelectorArgs()
{
StructAssert.IsCorrect <TemplateSelectorArgs <int> >();
var arg = default(TemplateSelectorArgs <int>);
DataTemplate template = new DataTemplate();
Assert.AreEqual(
template,
TemplateSelector.Create <int>(
e =>
{
arg = e;
return(template);
}).SelectTemplate(1, null));
StructAssert.AreEqual(arg, (x, y) => x == y, (x, y) => x != y);
StructAssert.AreNotEqual(arg, default(TemplateSelectorArgs <int>), (x, y) => x == y, (x, y) => x != y);
new HashSet <TemplateSelectorArgs <int> > {
default(TemplateSelectorArgs <int>), arg, arg
};
}
public void NoFunctions()
{
// invalid error strategy
ExceptionAssert.Throws <ArgumentOutOfRangeException>(
() => TemplateSelector.Create <int>(errorStrategy: (SelectorErrorStrategy)int.MaxValue),
"errorStrategy");
// with ConverterErrorStrategy.ReturnDefaultValue (default)
Assert.AreEqual <DataTemplate?>(null, TemplateSelector.Create <int>().SelectTemplate(1, null));
// with ConverterErrorStrategy.ReturnNewEmptyDataTemplate
DataTemplate result = TemplateSelector.Create <int>(errorStrategy: SelectorErrorStrategy.ReturnNewEmptyDataTemplate).SelectTemplate(1, null);
Assert.IsNotNull(result);
Assert.IsFalse(result.HasContent);
}
public void WithSelectFunction()
{
// with an input value of an unexpected type (use default error strategy)
Assert.IsNull(TemplateSelector.Create <int>(e => new DataTemplate()).SelectTemplate(true, null));
Assert.IsNull(TemplateSelector.Create <int>(e => new DataTemplate()).SelectTemplate(null, null));
// with a valid input value
DataTemplate template = new DataTemplate();
Assert.AreEqual(template, TemplateSelector.Create <int>(
e =>
{
Assert.AreEqual(1, e.Item);
return(template);
}).SelectTemplate(1, null));
}