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// Copyright 2019 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 lib provides utilities for runner.
package lib
import (
"context"
"encoding/csv"
"fmt"
"io"
"os"
"sort"
"strings"
"testing"
"time"
"gvisor.dev/gvisor/pkg/log"
"gvisor.dev/gvisor/pkg/test/dockerutil"
"gvisor.dev/gvisor/pkg/test/testutil"
)
// RunTests is a helper that is called by main. It exists so that we can run
// defered functions before exiting. It returns an exit code that should be
// passed to os.Exit.
func RunTests(lang, image, excludeFile string, batchSize int, timeout time.Duration) int {
// TODO(gvisor.dev/issue/1624): Remove those tests from all exclude lists
// that only fail with VFS1.
// Get tests to exclude.
excludes, err := getExcludes(excludeFile)
if err != nil {
fmt.Fprintf(os.Stderr, "Error getting exclude list: %s\n", err.Error())
return 1
}
// Construct the shared docker instance.
ctx := context.Background()
d := dockerutil.MakeContainer(ctx, testutil.DefaultLogger(lang))
defer d.CleanUp(ctx)
if err := testutil.TouchShardStatusFile(); err != nil {
fmt.Fprintf(os.Stderr, "error touching status shard file: %v\n", err)
return 1
}
// Get a slice of tests to run. This will also start a single Docker
// container that will be used to run each test. The final test will
// stop the Docker container.
tests, err := getTests(ctx, d, lang, image, batchSize, timeout, excludes)
if err != nil {
fmt.Fprintf(os.Stderr, "%s\n", err.Error())
return 1
}
m := testing.MainStart(testDeps{}, tests, nil, nil)
return m.Run()
}
// getTests executes all tests as table tests.
func getTests(ctx context.Context, d *dockerutil.Container, lang, image string, batchSize int, timeout time.Duration, excludes map[string]struct{}) ([]testing.InternalTest, error) {
// Start the container.
opts := dockerutil.RunOpts{
Image: fmt.Sprintf("runtimes/%s", image),
}
d.CopyFiles(&opts, "/proctor", "test/runtimes/proctor/proctor")
if err := d.Spawn(ctx, opts, "/proctor/proctor", "--pause"); err != nil {
return nil, fmt.Errorf("docker run failed: %v", err)
}
// Get a list of all tests in the image.
list, err := d.Exec(ctx, dockerutil.ExecOpts{}, "/proctor/proctor", "--runtime", lang, "--list")
if err != nil {
return nil, fmt.Errorf("docker exec failed: %v", err)
}
// Calculate a subset of tests.
tests := strings.Fields(list)
sort.Strings(tests)
indices, err := testutil.TestIndicesForShard(len(tests))
if err != nil {
return nil, fmt.Errorf("TestsForShard() failed: %v", err)
}
var itests []testing.InternalTest
for i := 0; i < len(indices); i += batchSize {
var tcs []string
end := i + batchSize
if end > len(indices) {
end = len(indices)
}
for _, tc := range indices[i:end] {
// Add test if not excluded.
if _, ok := excludes[tests[tc]]; ok {
log.Infof("Skipping test case %s\n", tests[tc])
continue
}
tcs = append(tcs, tests[tc])
}
if len(tcs) == 0 {
// No tests to add to this batch.
continue
}
itests = append(itests, testing.InternalTest{
Name: strings.Join(tcs, ", "),
F: func(t *testing.T) {
var (
now = time.Now()
done = make(chan struct{})
output string
err error
)
state, err := d.Status(ctx)
if err != nil {
t.Fatalf("Could not find container status: %v", err)
}
if !state.Running {
t.Fatalf("container is not running: state = %s", state.Status)
}
go func() {
output, err = d.Exec(ctx, dockerutil.ExecOpts{}, "/proctor/proctor", "--runtime", lang, "--tests", strings.Join(tcs, ","))
close(done)
}()
select {
case <-done:
if err == nil {
fmt.Printf("PASS: (%v) %d tests passed\n", time.Since(now), len(tcs))
return
}
t.Errorf("FAIL: (%v):\nBatch:\n%s\nOutput:\n%s\n", time.Since(now), strings.Join(tcs, "\n"), output)
case <-time.After(timeout):
t.Errorf("TIMEOUT: (%v):\nBatch:\n%s\nOutput:\n%s\n", time.Since(now), strings.Join(tcs, "\n"), output)
}
},
})
}
return itests, nil
}
// getExcludes reads the exclude file and returns a set of test names to
// exclude.
func getExcludes(excludeFile string) (map[string]struct{}, error) {
excludes := make(map[string]struct{})
if excludeFile == "" {
return excludes, nil
}
f, err := os.Open(excludeFile)
if err != nil {
return nil, err
}
defer f.Close()
r := csv.NewReader(f)
// First line is header. Skip it.
if _, err := r.Read(); err != nil {
return nil, err
}
for {
record, err := r.Read()
if err == io.EOF {
break
}
if err != nil {
return nil, err
}
excludes[record[0]] = struct{}{}
}
return excludes, nil
}
// testDeps implements testing.testDeps (an unexported interface), and is
// required to use testing.MainStart.
type testDeps struct{}
func (f testDeps) MatchString(a, b string) (bool, error) { return a == b, nil }
func (f testDeps) StartCPUProfile(io.Writer) error { return nil }
func (f testDeps) StopCPUProfile() {}
func (f testDeps) WriteProfileTo(string, io.Writer, int) error { return nil }
func (f testDeps) ImportPath() string { return "" }
func (f testDeps) StartTestLog(io.Writer) {}
func (f testDeps) StopTestLog() error { return nil }
func (f testDeps) SetPanicOnExit0(bool) {}
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