public void returns_missing_instance_if_it_exists_and_the_requested_instance_is_not_found()
{
var graph = new PluginGraph();
var family = graph.Families[typeof(IWidget)];
var missing = new ObjectInstance(new AWidget());
family.MissingInstance = missing;
graph.FindInstance(typeof(IWidget), "anything").ShouldBeTheSameAs(missing);
graph.FindInstance(typeof(IWidget), Guid.NewGuid().ToString()).ShouldBeTheSameAs(missing);
}
public void find_instance_negative_when_family_does_not_exist_does_not_create_family()
{
var graph = new PluginGraph();
graph.FindInstance(typeof(BigThingy), "blue").ShouldBeNull();
graph.Families.Has(typeof(BigThingy)).ShouldBeFalse();
}
public void find_instance_negative_when_family_does_exist_but_instance_does_not()
{
var graph = new PluginGraph();
graph.Families[typeof(BigThingy)].AddInstance(new SmartInstance <BigThingy>().Named("red"));
graph.FindInstance(typeof(BigThingy), "blue").ShouldBeNull();
}
public void find_instance_positive()
{
var graph = new PluginGraph();
var instance = new SmartInstance <BigThingy>().Named("red");
graph.Families[typeof(BigThingy)].AddInstance(instance);
graph.FindInstance(typeof(BigThingy), "red").ShouldBeTheSameAs(instance);
}
public void find_instance_can_use_missing_instance()
{
var graph = new PluginGraph();
var instance = new SmartInstance <BigThingy>().Named("red");
graph.Families[typeof(BigThingy)].MissingInstance = instance;
graph.FindInstance(typeof(BigThingy), "green")
.ShouldBeTheSameAs(instance);
}
public Instance FindInstance(Type pluginType, string name)
{
return(_pluginGraph.FindInstance(pluginType, name) ?? _parent.Instances.FindInstance(pluginType, name));
}
public Instance FindInstance(Type pluginType, string name)
{
return(_outer.FindInstance(pluginType, name) ?? _parent.FindInstance(pluginType, name));
}