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// Copyright 2020 The gVisor Authors.
//
// 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 dockerutil
import (
"context"
"fmt"
"os"
"path/filepath"
"testing"
"time"
)
type testCase struct {
name string
pprof Pprof
expectedFiles []string
}
func TestPprof(t *testing.T) {
// Basepath and expected file names for each type of profile.
basePath := "/tmp/test/profile"
block := "block.pprof"
cpu := "cpu.pprof"
goprofle := "go.pprof"
heap := "heap.pprof"
mutex := "mutex.pprof"
testCases := []testCase{
{
name: "Cpu",
pprof: Pprof{
BasePath: basePath,
CPUProfile: true,
Duration: 2 * time.Second,
},
expectedFiles: []string{cpu},
},
{
name: "All",
pprof: Pprof{
BasePath: basePath,
BlockProfile: true,
CPUProfile: true,
GoRoutineProfile: true,
HeapProfile: true,
MutexProfile: true,
Duration: 2 * time.Second,
},
expectedFiles: []string{block, cpu, goprofle, heap, mutex},
},
}
for _, tc := range testCases {
t.Run(tc.name, func(t *testing.T) {
ctx := context.Background()
c := MakeContainer(ctx, t)
// Set basepath to include the container name so there are no conflicts.
tc.pprof.BasePath = filepath.Join(tc.pprof.BasePath, c.Name)
c.AddProfile(&tc.pprof)
func() {
defer c.CleanUp(ctx)
// Start a container.
if err := c.Spawn(ctx, RunOpts{
Image: "basic/alpine",
}, "sleep", "1000"); err != nil {
t.Fatalf("run failed with: %v", err)
}
if status, err := c.Status(context.Background()); !status.Running {
t.Fatalf("container is not yet running: %+v err: %v", status, err)
}
// End early if the expected files exist and have data.
for start := time.Now(); time.Since(start) < tc.pprof.Duration; time.Sleep(500 * time.Millisecond) {
if err := checkFiles(tc); err == nil {
break
}
}
}()
// Check all expected files exist and have data.
if err := checkFiles(tc); err != nil {
t.Fatalf(err.Error())
}
})
}
}
func checkFiles(tc testCase) error {
for _, file := range tc.expectedFiles {
stat, err := os.Stat(filepath.Join(tc.pprof.BasePath, file))
if err != nil {
return fmt.Errorf("stat failed with: %v", err)
} else if stat.Size() < 1 {
return fmt.Errorf("file not written to: %+v", stat)
}
}
return nil
}
func TestMain(m *testing.M) {
EnsureSupportedDockerVersion()
os.Exit(m.Run())
}
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