112 lines
2.4 KiB
Go
112 lines
2.4 KiB
Go
package app
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import (
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"bufio"
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"bytes"
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"io"
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"os"
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"path/filepath"
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"reflect"
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"strings"
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"sync"
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"testing"
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"github.com/google/go-cmp/cmp"
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"go.uber.org/zap"
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"github.com/helmfile/helmfile/pkg/helmexec"
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)
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func runWithLogCapture(t *testing.T, f func(*testing.T, *zap.SugaredLogger)) *bytes.Buffer {
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t.Helper()
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bs := &bytes.Buffer{}
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logReader, logWriter := io.Pipe()
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logFlushed := &sync.WaitGroup{}
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// Ensure all the log is consumed into `bs` by calling `logWriter.Close()` followed by `logFlushed.Wait()`
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logFlushed.Add(1)
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go func() {
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scanner := bufio.NewScanner(logReader)
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for scanner.Scan() {
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bs.Write(scanner.Bytes())
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bs.WriteString("\n")
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}
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logFlushed.Done()
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}()
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defer func() {
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// This is here to avoid data-trace on bytes buffer `bs` to capture logs
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if err := logWriter.Close(); err != nil {
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panic(err)
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}
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logFlushed.Wait()
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}()
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logger := helmexec.NewLogger(logWriter, "debug")
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f(t, logger)
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return bs
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}
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func assertLogEqualsToSnapshot(t *testing.T, data string) {
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t.Helper()
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assertEqualsToSnapshot(t, "log", data)
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}
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func assertEqualsToSnapshot(t *testing.T, name string, data string) {
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type thisPkgLocator struct{}
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t.Helper()
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snapshotFileName := snapshotFileName(t, name)
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if os.Getenv("HELMFILE_UPDATE_SNAPSHOT") != "" {
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update(t, snapshotFileName, []byte(data))
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return
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}
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wantData, err := os.ReadFile(snapshotFileName)
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if err != nil {
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t.Fatalf(
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"Snapshot file %q does not exist. Rerun this test with `HELMFILE_UPDATE_SNAPSHOT=1 go test -v -run %s %s` to create the snapshot",
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snapshotFileName,
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t.Name(),
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reflect.TypeOf(thisPkgLocator{}).PkgPath(),
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)
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}
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want := string(wantData)
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if d := cmp.Diff(want, data); d != "" {
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t.Errorf("unexpected %s: want (-), got (+): %s", name, d)
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t.Errorf(
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"If you think this is due to the snapshot file being outdated, rerun this test with `HELMFILE_UPDATE_SNAPSHOT=1 go test -v -run %s %s` to update the snapshot",
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t.Name(),
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reflect.TypeOf(thisPkgLocator{}).PkgPath(),
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)
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}
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}
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func update(t *testing.T, snapshotFileName string, data []byte) {
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t.Helper()
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if err := os.MkdirAll(filepath.Dir(snapshotFileName), 0755); err != nil {
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t.Fatalf("%v", err)
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}
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if err := os.WriteFile(snapshotFileName, data, 0644); err != nil {
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t.Fatalf("%v", err)
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}
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}
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func snapshotFileName(t *testing.T, name string) string {
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dir := filepath.Join(strings.Split(strings.ToLower(t.Name()), "/")...)
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return filepath.Join("testdata", dir, name)
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}
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