// Copyright 2015 CoreOS, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package wait

import (
	"fmt"
	"testing"
)

func TestWait(t *testing.T) {
	const eid = 1
	wt := New()
	ch := wt.Register(eid)
	wt.Trigger(eid, "foo")
	v := <-ch
	if g, w := fmt.Sprintf("%v (%T)", v, v), "foo (string)"; g != w {
		t.Errorf("<-ch = %v, want %v", g, w)
	}

	if g := <-ch; g != nil {
		t.Errorf("unexpected non-nil value: %v (%T)", g, g)
	}
}

func TestRegisterDupSuppression(t *testing.T) {
	const eid = 1
	wt := New()
	ch1 := wt.Register(eid)
	ch2 := wt.Register(eid)
	wt.Trigger(eid, "foo")
	<-ch1
	g := <-ch2
	if g != nil {
		t.Errorf("unexpected non-nil value: %v (%T)", g, g)
	}
}

func TestTriggerDupSuppression(t *testing.T) {
	const eid = 1
	wt := New()
	ch := wt.Register(eid)
	wt.Trigger(eid, "foo")
	wt.Trigger(eid, "bar")

	v := <-ch
	if g, w := fmt.Sprintf("%v (%T)", v, v), "foo (string)"; g != w {
		t.Errorf("<-ch = %v, want %v", g, w)
	}

	if g := <-ch; g != nil {
		t.Errorf("unexpected non-nil value: %v (%T)", g, g)
	}
}