manager_test.go

//
// Copyright 2019 Insolar Technologies GmbH
//
// 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 component

import (
	"context"
	"fmt"
	"testing"

	"github.com/stretchr/testify/require"
)

type Interface1 interface {
	Method1()
}

type Interface2 interface {
	Method2()
}

type Component1 struct {
	field1     string
	Interface2 Interface2 `inject:""`
	asd        int
	started    bool
}

func (cm *Component1) Start(ctx context.Context) error {
	cm.Method1()
	cm.Interface2.Method2()
	return nil
}

func (cm *Component1) Method1() {
	fmt.Println("Component1.Method1 called")
}

type Component2 struct {
	field2     string
	Interface1 Interface1 `inject:""`
	dsa        string
	started    bool
}

func (cm *Component2) Start(ctx context.Context) error {
	cm.Interface1.Method1()
	cm.Method2()
	return nil
}

func (cm *Component2) Stop(ctx context.Context) error {
	return nil
}

func (cm *Component2) Method2() {
	fmt.Println("Component2.Method2 called")
}

func TestComponentManager_Inject(t *testing.T) {
	cm := NewManager(nil)
	cm.Inject(&Component1{}, &Component2{})

	require.NoError(t, cm.Start(nil))
	require.NoError(t, cm.Stop(nil))
}

type Component3 struct {
	started bool
	stopped bool
}

func (c *Component3) Start(ctx context.Context) error {
	c.started = true
	return nil
}

func (c *Component3) Stop(ctx context.Context) error {
	c.stopped = true
	return nil
}

func TestComponentManager_NoCallStopIfNoCallStart(t *testing.T) {
	c := Component3{}
	cm := NewManager(nil)
	cm.Inject(&c)
	err := cm.Stop(context.Background())
	require.NoError(t, err)
	require.False(t, c.stopped)
	require.False(t, c.started)

	err = cm.Start(context.Background())
	require.NoError(t, err)
	require.False(t, c.stopped)
	require.True(t, c.started)

	err = cm.Stop(context.Background())
	require.NoError(t, err)
	require.True(t, c.stopped)
	require.True(t, c.started)
}