// Copyright 2022 PingCAP, 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,
// See the License for the specific language governing permissions and
// limitations under the License.

package model

import (
	"testing"

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

func TestTerminateState(t *testing.T) {
	t.Parallel()
	testCases := []struct {
		code     WorkerState
		expected bool
	}{
		{WorkerStateNormal, false},
		{WorkerStateCreated, false},
		{WorkerStateInit, false},
		{WorkerStateError, true},
		{WorkerStateFinished, true},
		{WorkerStateStopped, true},
	}
	s := &WorkerStatus{}
	for _, tc := range testCases {
		s.State = tc.code
		require.Equal(t, tc.expected, s.InTerminateState())
	}
}

func TestHasSignificantChange(t *testing.T) {
	t.Parallel()

	testCases := []struct {
		prev, next *WorkerStatus
		changed    bool
	}{
		{
			prev:    &WorkerStatus{State: WorkerStateInit, ErrorMsg: "1"},
			next:    &WorkerStatus{State: WorkerStateInit, ErrorMsg: "2"},
			changed: true,
		},
		{
			prev:    &WorkerStatus{State: WorkerStateFinished, ErrorMsg: "1"},
			next:    &WorkerStatus{State: WorkerStateFinished, ErrorMsg: "1"},
			changed: false,
		},
		{
			prev:    &WorkerStatus{State: WorkerStateFinished, ErrorMsg: "1", ExtBytes: []byte("1")},
			next:    &WorkerStatus{State: WorkerStateFinished, ErrorMsg: "1", ExtBytes: []byte("2")},
			changed: false,
		},
		{
			prev:    &WorkerStatus{State: WorkerStateFinished, ErrorMsg: "1", ExtBytes: []byte("1")},
			next:    &WorkerStatus{State: WorkerStateFinished, ErrorMsg: "2", ExtBytes: []byte("2")},
			changed: true,
		},
		{
			prev:    &WorkerStatus{State: WorkerStateInit, ErrorMsg: "1"},
			next:    &WorkerStatus{State: WorkerStateNormal, ErrorMsg: "1"},
			changed: true,
		},
	}

	for _, tc := range testCases {
		changed := tc.prev.HasSignificantChange(tc.next)
		require.Equal(t, tc.changed, changed)
	}
}