mirror of https://github.com/knative/pkg.git
102 lines
2.6 KiB
Go
102 lines
2.6 KiB
Go
/*
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Copyright 2021 The Knative Authors
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package test
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import (
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"bytes"
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"context"
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"errors"
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"fmt"
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"os"
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"os/exec"
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"strings"
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"testing"
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"time"
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"k8s.io/apimachinery/pkg/util/wait"
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)
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func TestCleanupOnInterrupt(t *testing.T) {
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if os.Getenv("CLEANUP") == "1" {
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OnInterrupt(func() { fmt.Println("cleanup 1") })
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OnInterrupt(func() { fmt.Println("cleanup 2") })
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OnInterrupt(func() { fmt.Println("cleanup 3") })
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// This signals to the parent test that it should proceed
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os.Remove(os.Getenv("READY_FILE"))
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time.Sleep(5 * time.Second)
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return
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}
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readyFile, err := os.CreateTemp("", "")
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if err != nil {
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t.Fatalf("failed to setup tests")
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}
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readyFile.Close()
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cmd := exec.Command(os.Args[0], "-test.run=TestCleanupOnInterrupt", "-test.v=true")
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cmd.Env = append(os.Environ(), "CLEANUP=1", "READY_FILE="+readyFile.Name())
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var output bytes.Buffer
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cmd.Stdout = &output
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cmd.Stderr = &output
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if err := cmd.Start(); err != nil {
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t.Fatal("Running test failed", err)
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}
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p, err := os.FindProcess(cmd.Process.Pid)
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if err != nil {
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t.Fatal("Failed to find process", err)
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}
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// poll until the ready file is gone - indicating the subtest has been set up
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// with the cleanup functions
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err = wait.PollUntilContextTimeout(context.Background(), 100*time.Millisecond, 2*time.Second, true, func(ctx context.Context) (bool, error) {
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_, err := os.Stat(readyFile.Name())
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if os.IsNotExist(err) {
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return true, nil
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}
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return false, err
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})
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if err != nil {
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t.Fatal("Test subprocess never became ready", err)
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}
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if err := p.Signal(os.Interrupt); err != nil {
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t.Fatal("Failed to interrupt", err)
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}
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err = cmd.Wait()
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var exitErr *exec.ExitError
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if ok := errors.As(err, &exitErr); err != nil && !ok {
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t.Fatal("Running test had abnormal exit", err)
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}
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testOutput := output.String()
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idx1 := strings.Index(testOutput, "cleanup 1")
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idx2 := strings.Index(testOutput, "cleanup 2")
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idx3 := strings.Index(testOutput, "cleanup 3")
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// Order is first in first out (3, 2, 1)
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if idx3 > idx2 || idx2 > idx1 || idx1 == -1 {
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t.Errorf("Cleanup functions were not invoked in the proper order")
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}
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}
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