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|
package integration
import (
"context"
"testing"
"github.com/seaweedfs/seaweedfs/weed/pb/mq_pb"
"google.golang.org/grpc/metadata"
)
// MockSubscribeStream implements mq_pb.SeaweedMessaging_SubscribeMessageClient for testing
type MockSubscribeStream struct {
sendCalls []interface{}
closed bool
}
func (m *MockSubscribeStream) Send(req *mq_pb.SubscribeMessageRequest) error {
m.sendCalls = append(m.sendCalls, req)
return nil
}
func (m *MockSubscribeStream) Recv() (*mq_pb.SubscribeMessageResponse, error) {
return nil, nil
}
func (m *MockSubscribeStream) CloseSend() error {
m.closed = true
return nil
}
func (m *MockSubscribeStream) Header() (metadata.MD, error) { return nil, nil }
func (m *MockSubscribeStream) Trailer() metadata.MD { return nil }
func (m *MockSubscribeStream) Context() context.Context { return context.Background() }
func (m *MockSubscribeStream) SendMsg(m2 interface{}) error { return nil }
func (m *MockSubscribeStream) RecvMsg(m2 interface{}) error { return nil }
// TestNeedsRestart tests the NeedsRestart logic
func TestNeedsRestart(t *testing.T) {
bc := &BrokerClient{}
tests := []struct {
name string
session *BrokerSubscriberSession
requestedOffset int64
want bool
reason string
}{
{
name: "Stream is nil - needs restart",
session: &BrokerSubscriberSession{
Topic: "test-topic",
Partition: 0,
StartOffset: 100,
Stream: nil,
},
requestedOffset: 100,
want: true,
reason: "Stream is nil",
},
{
name: "Offset in cache - no restart needed",
session: &BrokerSubscriberSession{
Topic: "test-topic",
Partition: 0,
StartOffset: 100,
Stream: &MockSubscribeStream{},
Ctx: context.Background(),
consumedRecords: []*SeaweedRecord{
{Offset: 95},
{Offset: 96},
{Offset: 97},
{Offset: 98},
{Offset: 99},
},
},
requestedOffset: 97,
want: false,
reason: "Offset 97 is in cache [95-99]",
},
{
name: "Offset before current - needs restart",
session: &BrokerSubscriberSession{
Topic: "test-topic",
Partition: 0,
StartOffset: 100,
Stream: &MockSubscribeStream{},
Ctx: context.Background(),
},
requestedOffset: 50,
want: true,
reason: "Requested offset 50 < current 100",
},
{
name: "Large gap ahead - needs restart",
session: &BrokerSubscriberSession{
Topic: "test-topic",
Partition: 0,
StartOffset: 100,
Stream: &MockSubscribeStream{},
Ctx: context.Background(),
},
requestedOffset: 2000,
want: true,
reason: "Gap of 1900 is > 1000",
},
{
name: "Small gap ahead - no restart needed",
session: &BrokerSubscriberSession{
Topic: "test-topic",
Partition: 0,
StartOffset: 100,
Stream: &MockSubscribeStream{},
Ctx: context.Background(),
},
requestedOffset: 150,
want: false,
reason: "Gap of 50 is < 1000",
},
{
name: "Exact match - no restart needed",
session: &BrokerSubscriberSession{
Topic: "test-topic",
Partition: 0,
StartOffset: 100,
Stream: &MockSubscribeStream{},
Ctx: context.Background(),
},
requestedOffset: 100,
want: false,
reason: "Exact match with current offset",
},
{
name: "Context is nil - needs restart",
session: &BrokerSubscriberSession{
Topic: "test-topic",
Partition: 0,
StartOffset: 100,
Stream: &MockSubscribeStream{},
Ctx: nil,
},
requestedOffset: 100,
want: true,
reason: "Context is nil",
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
got := bc.NeedsRestart(tt.session, tt.requestedOffset)
if got != tt.want {
t.Errorf("NeedsRestart() = %v, want %v (reason: %s)", got, tt.want, tt.reason)
}
})
}
}
// TestNeedsRestart_CacheLogic tests cache-based restart decisions
func TestNeedsRestart_CacheLogic(t *testing.T) {
bc := &BrokerClient{}
// Create session with cache containing offsets 100-109
session := &BrokerSubscriberSession{
Topic: "test-topic",
Partition: 0,
StartOffset: 110,
Stream: &MockSubscribeStream{},
Ctx: context.Background(),
consumedRecords: []*SeaweedRecord{
{Offset: 100}, {Offset: 101}, {Offset: 102}, {Offset: 103}, {Offset: 104},
{Offset: 105}, {Offset: 106}, {Offset: 107}, {Offset: 108}, {Offset: 109},
},
}
testCases := []struct {
offset int64
want bool
desc string
}{
{100, false, "First offset in cache"},
{105, false, "Middle offset in cache"},
{109, false, "Last offset in cache"},
{99, true, "Before cache start"},
{110, false, "Current position"},
{111, false, "One ahead"},
{1200, true, "Large gap > 1000"},
}
for _, tc := range testCases {
t.Run(tc.desc, func(t *testing.T) {
got := bc.NeedsRestart(session, tc.offset)
if got != tc.want {
t.Errorf("NeedsRestart(offset=%d) = %v, want %v (%s)", tc.offset, got, tc.want, tc.desc)
}
})
}
}
// TestNeedsRestart_EmptyCache tests behavior with empty cache
func TestNeedsRestart_EmptyCache(t *testing.T) {
bc := &BrokerClient{}
session := &BrokerSubscriberSession{
Topic: "test-topic",
Partition: 0,
StartOffset: 100,
Stream: &MockSubscribeStream{},
Ctx: context.Background(),
consumedRecords: nil, // Empty cache
}
tests := []struct {
offset int64
want bool
desc string
}{
{50, true, "Before current"},
{100, false, "At current"},
{150, false, "Small gap ahead"},
{1200, true, "Large gap ahead"},
}
for _, tt := range tests {
t.Run(tt.desc, func(t *testing.T) {
got := bc.NeedsRestart(session, tt.offset)
if got != tt.want {
t.Errorf("NeedsRestart(offset=%d) = %v, want %v (%s)", tt.offset, got, tt.want, tt.desc)
}
})
}
}
// TestNeedsRestart_ThreadSafety tests concurrent access
func TestNeedsRestart_ThreadSafety(t *testing.T) {
bc := &BrokerClient{}
session := &BrokerSubscriberSession{
Topic: "test-topic",
Partition: 0,
StartOffset: 100,
Stream: &MockSubscribeStream{},
Ctx: context.Background(),
}
// Run many concurrent checks
done := make(chan bool)
for i := 0; i < 100; i++ {
go func(offset int64) {
bc.NeedsRestart(session, offset)
done <- true
}(int64(i))
}
// Wait for all to complete
for i := 0; i < 100; i++ {
<-done
}
// Test passes if no panic/race condition
}
// TestRestartSubscriber_StateManagement tests session state management
func TestRestartSubscriber_StateManagement(t *testing.T) {
oldStream := &MockSubscribeStream{}
oldCtx, oldCancel := context.WithCancel(context.Background())
session := &BrokerSubscriberSession{
Topic: "test-topic",
Partition: 0,
StartOffset: 100,
Stream: oldStream,
Ctx: oldCtx,
Cancel: oldCancel,
consumedRecords: []*SeaweedRecord{
{Offset: 100, Key: []byte("key100"), Value: []byte("value100")},
{Offset: 101, Key: []byte("key101"), Value: []byte("value101")},
{Offset: 102, Key: []byte("key102"), Value: []byte("value102")},
},
nextOffsetToRead: 103,
}
// Verify initial state
if len(session.consumedRecords) != 3 {
t.Errorf("Initial cache size = %d, want 3", len(session.consumedRecords))
}
if session.nextOffsetToRead != 103 {
t.Errorf("Initial nextOffsetToRead = %d, want 103", session.nextOffsetToRead)
}
if session.StartOffset != 100 {
t.Errorf("Initial StartOffset = %d, want 100", session.StartOffset)
}
// Note: Full RestartSubscriber testing requires gRPC mocking
// These tests verify the core state management and NeedsRestart logic
}
// BenchmarkNeedsRestart_CacheHit benchmarks cache hit performance
func BenchmarkNeedsRestart_CacheHit(b *testing.B) {
bc := &BrokerClient{}
session := &BrokerSubscriberSession{
Topic: "test-topic",
Partition: 0,
StartOffset: 1000,
Stream: &MockSubscribeStream{},
Ctx: context.Background(),
consumedRecords: make([]*SeaweedRecord, 100),
}
for i := 0; i < 100; i++ {
session.consumedRecords[i] = &SeaweedRecord{Offset: int64(i)}
}
b.ResetTimer()
for i := 0; i < b.N; i++ {
bc.NeedsRestart(session, 50) // Hit cache
}
}
// BenchmarkNeedsRestart_CacheMiss benchmarks cache miss performance
func BenchmarkNeedsRestart_CacheMiss(b *testing.B) {
bc := &BrokerClient{}
session := &BrokerSubscriberSession{
Topic: "test-topic",
Partition: 0,
StartOffset: 1000,
Stream: &MockSubscribeStream{},
Ctx: context.Background(),
consumedRecords: make([]*SeaweedRecord, 100),
}
for i := 0; i < 100; i++ {
session.consumedRecords[i] = &SeaweedRecord{Offset: int64(i)}
}
b.ResetTimer()
for i := 0; i < b.N; i++ {
bc.NeedsRestart(session, 500) // Miss cache (within gap threshold)
}
}
|
