package tools

import (
	"net/http"
	"testing"
)

type fakeTool struct{ key, name string }

func (f fakeTool) Definition() Definition     { return Definition{Key: f.key, Name: f.name} }
func (fakeTool) StudentHandler() http.Handler { return http.NotFoundHandler() }
func TestRegistry(t *testing.T) {
	r := NewRegistry()
	if err := r.Register(fakeTool{}); err == nil {
		t.Fatal("empty key accepted")
	}
	if err := r.Register(fakeTool{key: "b", name: "Beta"}); err != nil {
		t.Fatal(err)
	}
	if err := r.Register(fakeTool{key: "a", name: "Alpha"}); err != nil {
		t.Fatal(err)
	}
	if err := r.Register(fakeTool{key: "a", name: "Again"}); err == nil {
		t.Fatal("duplicate accepted")
	}
	if got := r.List(); len(got) != 2 || got[0].Definition().Key != "a" {
		t.Fatalf("unstable list: %#v", got)
	}
	if _, err := r.Get("missing"); err != ErrNotFound {
		t.Fatalf("got %v", err)
	}
}