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// Copyright 2024 syzkaller project authors. All rights reserved.
// Use of this source code is governed by Apache 2 LICENSE that can be found in the LICENSE file.
package main
import (
"context"
"fmt"
"sync"
"testing"
"time"
"github.com/google/syzkaller/syz-cluster/pkg/api"
"github.com/google/syzkaller/syz-cluster/pkg/app"
"github.com/google/syzkaller/syz-cluster/pkg/controller"
"github.com/google/syzkaller/syz-cluster/pkg/db"
"github.com/google/syzkaller/syz-cluster/pkg/workflow"
"github.com/stretchr/testify/assert"
)
// It's a bit too long for a unit test, but it captures the whole main scenario of operation.
func TestProcessor(t *testing.T) {
workflows := newMockedWorkflows()
processor, client, ctx := prepareProcessorTest(t, workflows)
// Start the loop.
var wg sync.WaitGroup
ctx2, cancel := context.WithCancel(ctx)
wg.Add(1)
go func() {
processor.Loop(ctx2)
wg.Done()
}()
// Add some series.
var allSeries []*api.Series
for i := 0; i < 10; i++ {
id := fmt.Sprintf("series-%d", i)
allSeries = append(allSeries, &api.Series{
ExtID: id,
Title: id,
})
}
for _, series := range allSeries[0:5] {
controller.UploadTestSeries(t, ctx, client, series)
}
// Let some workflows finish.
for i := 0; i < 2; i++ {
workflows.finish <- struct{}{}
}
awaitFinishedSessions(t, processor.seriesRepo, 2)
// Emulate the service restart by aborting the loop.
// This may break the execution in arbitrary places, which actually resembles the environment in which the code
// will actually work. The bugs it triggers may be difficult to reproduce though.
cancel()
wg.Wait()
ctx3, cancel := context.WithCancel(ctx)
wg.Add(1)
defer wg.Wait()
go func() {
processor.Loop(ctx3)
wg.Done()
}()
// Add some more series.
for _, series := range allSeries[5:10] {
controller.UploadTestSeries(t, ctx, client, series)
}
// Finish all of them.
for i := 0; i < 8; i++ {
workflows.finish <- struct{}{}
}
awaitFinishedSessions(t, processor.seriesRepo, 10)
cancel()
}
func TestFinishRunningSteps(t *testing.T) {
workflows := newMockedWorkflows()
processor, client, ctx := prepareProcessorTest(t, workflows)
// Start the loop.
var wg sync.WaitGroup
ctx2, cancel := context.WithCancel(ctx)
wg.Add(1)
go func() {
processor.Loop(ctx2)
wg.Done()
}()
series := &api.Series{
ExtID: "ext-id",
Title: "title",
}
ids := controller.UploadTestSeries(t, ctx, client, series)
buildResp := controller.UploadTestBuild(t, ctx, client, &api.Build{
Arch: "amd64",
TreeName: "mainline",
ConfigName: "config",
CommitHash: "abcd",
})
err := client.UploadTestResult(ctx, &api.TestResult{
SessionID: ids.SessionID,
BaseBuildID: buildResp.ID,
TestName: "test",
Result: api.TestRunning,
})
assert.NoError(t, err)
// Let the workflow finish.
workflows.finish <- struct{}{}
awaitFinishedSessions(t, processor.seriesRepo, 1)
cancel()
// Verify that the session test is finished.
// A bit hacky, but it works.
list, err := processor.sessionTestRepo.BySessionRaw(ctx, ids.SessionID)
assert.NoError(t, err)
assert.Equal(t, api.TestError, list[0].Result)
}
func awaitFinishedSessions(t *testing.T, seriesRepo *db.SeriesRepository, wantFinished int) {
t.Logf("awaiting %d finished sessions", wantFinished)
deadline := time.Second * 2
interval := time.Second / 10
for i := 0; i < int(deadline/interval); i++ {
time.Sleep(interval)
list, err := seriesRepo.ListLatest(context.Background(), db.SeriesFilter{}, time.Time{})
assert.NoError(t, err)
withFinishedSeries := 0
for _, item := range list {
if item.Session == nil {
continue
}
if item.Session.FinishedAt.IsNull() {
continue
}
withFinishedSeries++
}
t.Logf("have %d finished", withFinishedSeries)
if withFinishedSeries == wantFinished {
return
}
}
t.Fatalf("never reached %d finished series", wantFinished)
}
type mockedWorkflows struct {
workflow.MockService
finish chan struct{}
created map[string]struct{}
}
func newMockedWorkflows() *mockedWorkflows {
obj := mockedWorkflows{
finish: make(chan struct{}),
created: make(map[string]struct{}),
}
obj.PollDelayValue = time.Millisecond
obj.OnStart = func(id string) error {
obj.created[id] = struct{}{}
return nil
}
obj.OnStatus = func(id string) (workflow.Status, []byte, error) {
_, ok := obj.created[id]
if !ok {
return workflow.StatusNotFound, nil, nil
}
finished := false
select {
case <-obj.finish:
finished = true
default:
}
if finished {
return workflow.StatusFinished, nil, nil
}
return workflow.StatusRunning, nil, nil
}
return &obj
}
func prepareProcessorTest(t *testing.T, workflows workflow.Service) (*SeriesProcessor,
*api.Client, context.Context) {
env, ctx := app.TestEnvironment(t)
client := controller.TestServer(t, env)
return &SeriesProcessor{
seriesRepo: db.NewSeriesRepository(env.Spanner),
sessionRepo: db.NewSessionRepository(env.Spanner),
sessionTestRepo: db.NewSessionTestRepository(env.Spanner),
workflows: workflows,
dbPollInterval: time.Second / 10,
parallelWorkflows: 2,
}, client, ctx
}
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