github.com/pingcap/tiflow@v0.0.0-20240520035814-5bf52d54e205/engine/servermaster/service_util_test.go (about)

     1  // Copyright 2022 PingCAP, Inc.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // See the License for the specific language governing permissions and
    12  // limitations under the License.
    13  
    14  package servermaster
    15  
    16  import (
    17  	"strings"
    18  	"testing"
    19  
    20  	"github.com/golang/mock/gomock"
    21  	electionMock "github.com/pingcap/tiflow/pkg/election/mock"
    22  	"github.com/stretchr/testify/require"
    23  )
    24  
    25  func TestGenerateNodeID(t *testing.T) {
    26  	const (
    27  		name           = "executor"
    28  		genCount       = 1000
    29  		minUniqueCount = 999 // Only allow 0.1% of collisions.
    30  	)
    31  
    32  	ids := make(map[string]struct{})
    33  	for i := 0; i < genCount; i++ {
    34  		id := generateNodeID(name)
    35  		require.True(t, strings.HasPrefix(id, name+"-"))
    36  		ids[id] = struct{}{}
    37  	}
    38  
    39  	require.GreaterOrEqual(t, len(ids), minUniqueCount, "too many collisions")
    40  }
    41  
    42  func TestFeatureDegrader(t *testing.T) {
    43  	fd := newFeatureDegrader()
    44  	require.False(t, fd.Available("ListExecutors"))
    45  	require.False(t, fd.Available("CreateJob"))
    46  	require.True(t, fd.Available("QueryMetaStore"))
    47  	require.True(t, fd.Available("UnknownAPI"))
    48  
    49  	fd.updateExecutorManager(true)
    50  	fd.updateMasterWorkerManager(true)
    51  	require.True(t, fd.Available("ListExecutors"))
    52  	require.True(t, fd.Available("CreateJob"))
    53  }
    54  
    55  func TestForwardChecker(t *testing.T) {
    56  	t.Parallel()
    57  
    58  	elector := electionMock.NewMockElector(gomock.NewController(t))
    59  	fc := newForwardChecker(elector)
    60  	for method := range leaderOnlyMethods {
    61  		require.True(t, fc.LeaderOnly(method))
    62  	}
    63  
    64  	elector.EXPECT().IsLeader().Times(1).Return(true)
    65  	require.True(t, fc.IsLeader())
    66  	elector.EXPECT().IsLeader().Times(1).Return(false)
    67  	require.False(t, fc.IsLeader())
    68  }