public void Can_add_and_remove_annotation()
{
var metadataBase = new ConcreteMetadata();
Assert.Null(metadataBase.TryGetAnnotation("Foo"));
Assert.Null(metadataBase.RemoveAnnotation(new Annotation("Foo", "Bar")));
var annotation = metadataBase.AddAnnotation("Foo", "Bar");
Assert.NotNull(annotation);
Assert.Equal("Bar", annotation.Value);
Assert.Equal("Bar", metadataBase["Foo"]);
Assert.Same(annotation, metadataBase.TryGetAnnotation("Foo"));
Assert.Same(annotation, metadataBase.GetOrAddAnnotation("Foo", "Baz"));
Assert.Equal(new[] { annotation }, metadataBase.Annotations.ToArray());
Assert.Same(annotation, metadataBase.RemoveAnnotation(annotation));
Assert.Empty(metadataBase.Annotations);
Assert.Null(metadataBase.RemoveAnnotation(annotation));
Assert.Null(metadataBase["Foo"]);
Assert.Null(metadataBase.TryGetAnnotation("Foo"));
}
public void Can_get_and_set_model_annotations()
{
var metadataBase = new ConcreteMetadata();
var annotation = metadataBase.GetOrAddAnnotation("Foo", "Bar");
Assert.NotNull(annotation);
Assert.Same(annotation, metadataBase.TryGetAnnotation("Foo"));
Assert.Same(annotation, metadataBase.GetAnnotation("Foo"));
Assert.Null(metadataBase["foo"]);
Assert.Null(metadataBase.TryGetAnnotation("foo"));
metadataBase["Foo"] = "horse";
Assert.Equal("horse", metadataBase["Foo"]);
metadataBase["Foo"] = null;
Assert.Null(metadataBase["Foo"]);
Assert.Empty(metadataBase.Annotations);
Assert.Equal(
Strings.FormatAnnotationNotFound("Foo"),
Assert.Throws <ModelItemNotFoundException>(() => metadataBase.GetAnnotation("Foo")).Message);
}