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- // Copyright 2016 Google LLC
- //
- // 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 internal
-
- import (
- "errors"
- "fmt"
- "testing"
- "time"
-
- gax "github.com/googleapis/gax-go"
- "golang.org/x/net/context"
- "google.golang.org/grpc/codes"
- "google.golang.org/grpc/status"
- )
-
- func TestRetry(t *testing.T) {
- ctx := context.Background()
- // Without a context deadline, retry will run until the function
- // says not to retry any more.
- n := 0
- endRetry := errors.New("end retry")
- err := retry(ctx, gax.Backoff{},
- func() (bool, error) {
- n++
- if n < 10 {
- return false, nil
- }
- return true, endRetry
- },
- func(context.Context, time.Duration) error { return nil })
- if got, want := err, endRetry; got != want {
- t.Errorf("got %v, want %v", err, endRetry)
- }
- if n != 10 {
- t.Errorf("n: got %d, want %d", n, 10)
- }
-
- // If the context has a deadline, sleep will return an error
- // and end the function.
- n = 0
- err = retry(ctx, gax.Backoff{},
- func() (bool, error) { return false, nil },
- func(context.Context, time.Duration) error {
- n++
- if n < 10 {
- return nil
- }
- return context.DeadlineExceeded
- })
- if err == nil {
- t.Error("got nil, want error")
- }
- }
-
- func TestRetryPreserveError(t *testing.T) {
- // Retry tries to preserve the type and other information from
- // the last error returned by the function.
- err := retry(context.Background(), gax.Backoff{},
- func() (bool, error) {
- return false, status.Error(codes.NotFound, "not found")
- },
- func(context.Context, time.Duration) error {
- return context.DeadlineExceeded
- })
- got, ok := status.FromError(err)
- if !ok {
- t.Fatalf("got %T, wanted a status", got)
- }
- if g, w := got.Code(), codes.NotFound; g != w {
- t.Errorf("got code %v, want %v", g, w)
- }
- wantMessage := fmt.Sprintf("retry failed with %v; last error: not found", context.DeadlineExceeded)
- if g, w := got.Message(), wantMessage; g != w {
- t.Errorf("got message %q, want %q", g, w)
- }
- }
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