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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.
// Binary runner runs the runtime tests in a Docker container.
package main
import (
"encoding/csv"
"flag"
"fmt"
"io"
"os"
"sort"
"strings"
"testing"
"time"
"gvisor.dev/gvisor/runsc/dockerutil"
"gvisor.dev/gvisor/runsc/testutil"
)
var (
lang = flag.String("lang", "", "language runtime to test")
image = flag.String("image", "", "docker image with runtime tests")
blacklistFile = flag.String("blacklist_file", "", "file containing blacklist of tests to exclude, in CSV format with fields: test name, bug id, comment")
)
// Wait time for each test to run.
const timeout = 5 * time.Minute
func main() {
flag.Parse()
if *lang == "" || *image == "" {
fmt.Fprintf(os.Stderr, "lang and image flags must not be empty\n")
os.Exit(1)
}
os.Exit(runTests())
}
// 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() int {
// Get tests to blacklist.
blacklist, err := getBlacklist()
if err != nil {
fmt.Fprintf(os.Stderr, "Error getting blacklist: %s\n", err.Error())
return 1
}
// Create a single docker container that will be used for all tests.
d := dockerutil.MakeDocker("gvisor-" + *lang)
defer d.CleanUp()
// 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(d, blacklist)
if err != nil {
fmt.Fprintf(os.Stderr, "%s\n", err.Error())
return 1
}
m := testing.MainStart(testDeps{}, tests, nil, nil)
return m.Run()
}
// getTests returns a slice of tests to run, subject to the shard size and
// index.
func getTests(d dockerutil.Docker, blacklist map[string]struct{}) ([]testing.InternalTest, error) {
// Pull the image.
if err := dockerutil.Pull(*image); err != nil {
return nil, fmt.Errorf("docker pull %q failed: %v", *image, err)
}
// Run proctor with --pause flag to keep container alive forever.
if err := d.Run(*image, "--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("/proctor", "--runtime", *lang, "--list")
if err != nil {
return nil, fmt.Errorf("docker exec failed: %v", err)
}
// Calculate a subset of tests to run corresponding to the current
// shard.
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 _, tci := range indices {
// Capture tc in this scope.
tc := tests[tci]
itests = append(itests, testing.InternalTest{
Name: tc,
F: func(t *testing.T) {
// Is the test blacklisted?
if _, ok := blacklist[tc]; ok {
t.Skipf("SKIP: blacklisted test %q", tc)
}
var (
now = time.Now()
done = make(chan struct{})
output string
err error
)
go func() {
fmt.Printf("RUNNING %s...\n", tc)
output, err = d.Exec("/proctor", "--runtime", *lang, "--test", tc)
close(done)
}()
select {
case <-done:
if err == nil {
fmt.Printf("PASS: %s (%v)\n\n", tc, time.Since(now))
return
}
t.Errorf("FAIL: %s (%v):\n%s\n", tc, time.Since(now), output)
case <-time.After(timeout):
t.Errorf("TIMEOUT: %s (%v):\n%s\n", tc, time.Since(now), output)
}
},
})
}
return itests, nil
}
// getBlacklist reads the blacklist file and returns a set of test names to
// exclude.
func getBlacklist() (map[string]struct{}, error) {
blacklist := make(map[string]struct{})
if *blacklistFile == "" {
return blacklist, nil
}
file, err := testutil.FindFile(*blacklistFile)
if err != nil {
return nil, err
}
f, err := os.Open(file)
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
}
blacklist[record[0]] = struct{}{}
}
return blacklist, 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 }
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