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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"
"io/ioutil"
"os"
"path/filepath"
"testing"
"time"
)
type testCase struct {
name string
profile profile
expectedFiles []string
}
func TestProfile(t *testing.T) {
// Basepath and expected file names for each type of profile.
tmpDir, err := ioutil.TempDir("", "")
if err != nil {
t.Fatalf("unable to create temporary directory: %v", err)
}
defer os.RemoveAll(tmpDir)
// All expected names.
basePath := tmpDir
block := "block.pprof"
cpu := "cpu.pprof"
heap := "heap.pprof"
mutex := "mutex.pprof"
testCases := []testCase{
{
name: "One",
profile: profile{
BasePath: basePath,
Types: []string{"cpu"},
Duration: 2 * time.Second,
},
expectedFiles: []string{cpu},
},
{
name: "All",
profile: profile{
BasePath: basePath,
Types: []string{"block", "cpu", "heap", "mutex"},
Duration: 2 * time.Second,
},
expectedFiles: []string{block, cpu, 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.
localProfile := tc.profile // Copy it.
localProfile.BasePath = filepath.Join(localProfile.BasePath, tc.name)
// Set directly on the container, to avoid flags.
c.profile = &localProfile
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) < localProfile.Duration; time.Sleep(100 * time.Millisecond) {
if err := checkFiles(localProfile.BasePath, tc.expectedFiles); err == nil {
break
}
}
}()
// Check all expected files exist and have data.
if err := checkFiles(localProfile.BasePath, tc.expectedFiles); err != nil {
t.Fatalf(err.Error())
}
})
}
}
func checkFiles(basePath string, expectedFiles []string) error {
for _, file := range expectedFiles {
stat, err := os.Stat(filepath.Join(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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