| // Copyright 2020 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 storage |
| |
| import ( |
| "context" |
| "errors" |
| "fmt" |
| "io" |
| "net" |
| "net/http" |
| "net/url" |
| "regexp" |
| "strings" |
| "testing" |
| |
| "golang.org/x/xerrors" |
| |
| "google.golang.org/api/googleapi" |
| "google.golang.org/grpc/codes" |
| "google.golang.org/grpc/status" |
| ) |
| |
| func TestInvoke(t *testing.T) { |
| t.Parallel() |
| ctx := context.Background() |
| // Time-based tests are flaky. We just make sure that invoke eventually |
| // returns with the right error. |
| |
| for _, test := range []struct { |
| desc string |
| count int // Number of times to return retryable error. |
| initialErr error // Error to return initially. |
| finalErr error // Error to return after count returns of retryCode. |
| retry *retryConfig |
| isIdempotentValue bool |
| expectFinalErr bool |
| }{ |
| { |
| desc: "test fn never returns initial error with count=0", |
| count: 0, |
| initialErr: &googleapi.Error{Code: 0}, //non-retryable |
| finalErr: nil, |
| isIdempotentValue: true, |
| expectFinalErr: true, |
| }, |
| { |
| desc: "non-retryable error is returned without retrying", |
| count: 1, |
| initialErr: &googleapi.Error{Code: 0}, |
| finalErr: nil, |
| isIdempotentValue: true, |
| expectFinalErr: false, |
| }, |
| { |
| desc: "retryable error is retried", |
| count: 1, |
| initialErr: &googleapi.Error{Code: 429}, |
| finalErr: nil, |
| isIdempotentValue: true, |
| expectFinalErr: true, |
| }, |
| { |
| desc: "returns non-retryable error after retryable error", |
| count: 1, |
| initialErr: &googleapi.Error{Code: 429}, |
| finalErr: errors.New("bar"), |
| isIdempotentValue: true, |
| expectFinalErr: true, |
| }, |
| { |
| desc: "retryable 5xx error is retried", |
| count: 2, |
| initialErr: &googleapi.Error{Code: 518}, |
| finalErr: nil, |
| isIdempotentValue: true, |
| expectFinalErr: true, |
| }, |
| { |
| desc: "retriable error not retried when non-idempotent", |
| count: 2, |
| initialErr: &googleapi.Error{Code: 599}, |
| finalErr: nil, |
| isIdempotentValue: false, |
| expectFinalErr: false, |
| }, |
| { |
| |
| desc: "non-idempotent retriable error retried when policy is RetryAlways", |
| count: 2, |
| initialErr: &googleapi.Error{Code: 500}, |
| finalErr: nil, |
| isIdempotentValue: false, |
| retry: &retryConfig{policy: RetryAlways}, |
| expectFinalErr: true, |
| }, |
| { |
| desc: "retriable error not retried when policy is RetryNever", |
| count: 2, |
| initialErr: &url.Error{Op: "blah", URL: "blah", Err: errors.New("connection refused")}, |
| finalErr: nil, |
| isIdempotentValue: true, |
| retry: &retryConfig{policy: RetryNever}, |
| expectFinalErr: false, |
| }, |
| { |
| desc: "non-retriable error not retried when policy is RetryAlways", |
| count: 2, |
| initialErr: xerrors.Errorf("non-retriable error: %w", &googleapi.Error{Code: 400}), |
| finalErr: nil, |
| isIdempotentValue: true, |
| retry: &retryConfig{policy: RetryAlways}, |
| expectFinalErr: false, |
| }, |
| |
| { |
| desc: "non-retriable error retried with custom fn", |
| count: 2, |
| initialErr: io.ErrNoProgress, |
| finalErr: nil, |
| isIdempotentValue: true, |
| retry: &retryConfig{ |
| shouldRetry: func(err error) bool { |
| return err == io.ErrNoProgress |
| }, |
| }, |
| expectFinalErr: true, |
| }, |
| { |
| desc: "retriable error not retried with custom fn", |
| count: 2, |
| initialErr: io.ErrUnexpectedEOF, |
| finalErr: nil, |
| isIdempotentValue: true, |
| retry: &retryConfig{ |
| shouldRetry: func(err error) bool { |
| return err == io.ErrNoProgress |
| }, |
| }, |
| expectFinalErr: false, |
| }, |
| { |
| desc: "error not retried when policy is RetryNever despite custom fn", |
| count: 2, |
| initialErr: io.ErrUnexpectedEOF, |
| finalErr: nil, |
| isIdempotentValue: true, |
| retry: &retryConfig{ |
| shouldRetry: func(err error) bool { |
| return err == io.ErrUnexpectedEOF |
| }, |
| policy: RetryNever, |
| }, |
| expectFinalErr: false, |
| }, |
| } { |
| t.Run(test.desc, func(s *testing.T) { |
| counter := 0 |
| req := &fakeApiaryRequest{header: http.Header{}} |
| var initialHeader string |
| call := func() error { |
| if counter == 0 { |
| initialHeader = req.Header()["X-Goog-Api-Client"][0] |
| } |
| counter++ |
| if counter <= test.count { |
| return test.initialErr |
| } |
| return test.finalErr |
| } |
| got := run(ctx, call, test.retry, test.isIdempotentValue, setRetryHeaderHTTP(req)) |
| if test.expectFinalErr && got != test.finalErr { |
| s.Errorf("got %v, want %v", got, test.finalErr) |
| } else if !test.expectFinalErr && got != test.initialErr { |
| s.Errorf("got %v, want %v", got, test.initialErr) |
| } |
| gotHeader := req.Header()["X-Goog-Api-Client"][0] |
| wantAttempts := 1 + test.count |
| if !test.expectFinalErr { |
| wantAttempts = 1 |
| } |
| wantHeader := strings.ReplaceAll(initialHeader, "gccl-attempt-count/1", fmt.Sprintf("gccl-attempt-count/%v", wantAttempts)) |
| if gotHeader != wantHeader { |
| t.Errorf("case %q, retry header:\ngot %v\nwant %v", test.desc, gotHeader, wantHeader) |
| } |
| wantHeaderFormat := "gccl-invocation-id/.{36} gccl-attempt-count/[0-9]+ gl-go/.* gccl/" |
| match, err := regexp.MatchString(wantHeaderFormat, gotHeader) |
| if err != nil { |
| s.Fatalf("compiling regexp: %v", err) |
| } |
| if !match { |
| s.Errorf("X-Goog-Api-Client header has wrong format\ngot %v\nwant regex matching %v", gotHeader, wantHeaderFormat) |
| } |
| }) |
| } |
| } |
| |
| type fakeApiaryRequest struct { |
| header http.Header |
| } |
| |
| func (f *fakeApiaryRequest) Header() http.Header { |
| return f.header |
| } |
| |
| func TestShouldRetry(t *testing.T) { |
| t.Parallel() |
| |
| for _, test := range []struct { |
| desc string |
| inputErr error |
| shouldRetry bool |
| }{ |
| { |
| desc: "googleapi.Error{Code: 0}", |
| inputErr: &googleapi.Error{Code: 0}, |
| shouldRetry: false, |
| }, |
| { |
| desc: "googleapi.Error{Code: 429}", |
| inputErr: &googleapi.Error{Code: 429}, |
| shouldRetry: true, |
| }, |
| { |
| desc: "errors.New(foo)", |
| inputErr: errors.New("foo"), |
| shouldRetry: false, |
| }, |
| { |
| desc: "googleapi.Error{Code: 518}", |
| inputErr: &googleapi.Error{Code: 518}, |
| shouldRetry: true, |
| }, |
| { |
| desc: "googleapi.Error{Code: 599}", |
| inputErr: &googleapi.Error{Code: 599}, |
| shouldRetry: true, |
| }, |
| { |
| desc: "googleapi.Error{Code: 428}", |
| inputErr: &googleapi.Error{Code: 428}, |
| shouldRetry: false, |
| }, |
| { |
| desc: "googleapi.Error{Code: 518}", |
| inputErr: &googleapi.Error{Code: 518}, |
| shouldRetry: true, |
| }, |
| { |
| desc: "url.Error{Err: errors.New(\"connection refused\")}", |
| inputErr: &url.Error{Op: "blah", URL: "blah", Err: errors.New("connection refused")}, |
| shouldRetry: true, |
| }, |
| { |
| desc: "io.ErrUnexpectedEOF", |
| inputErr: io.ErrUnexpectedEOF, |
| shouldRetry: true, |
| }, |
| { |
| desc: "wrapped retryable error", |
| inputErr: xerrors.Errorf("Test unwrapping of a temporary error: %w", &googleapi.Error{Code: 500}), |
| shouldRetry: true, |
| }, |
| { |
| desc: "wrapped non-retryable error", |
| inputErr: xerrors.Errorf("Test unwrapping of a non-retriable error: %w", &googleapi.Error{Code: 400}), |
| shouldRetry: false, |
| }, |
| { |
| desc: "googleapi.Error{Code: 400}", |
| inputErr: &googleapi.Error{Code: 400}, |
| shouldRetry: false, |
| }, |
| { |
| desc: "googleapi.Error{Code: 408}", |
| inputErr: &googleapi.Error{Code: 408}, |
| shouldRetry: true, |
| }, |
| { |
| desc: "retryable gRPC error", |
| inputErr: status.Error(codes.Unavailable, "retryable gRPC error"), |
| shouldRetry: true, |
| }, |
| { |
| desc: "non-retryable gRPC error", |
| inputErr: status.Error(codes.PermissionDenied, "non-retryable gRPC error"), |
| shouldRetry: false, |
| }, |
| { |
| desc: "wrapped ErrClosed text", |
| // TODO: check directly against wrapped net.ErrClosed (go 1.16+) |
| inputErr: &net.OpError{Op: "write", Err: errors.New("use of closed network connection")}, |
| shouldRetry: true, |
| }, |
| } { |
| t.Run(test.desc, func(s *testing.T) { |
| got := shouldRetry(test.inputErr) |
| |
| if got != test.shouldRetry { |
| s.Errorf("got %v, want %v", got, test.shouldRetry) |
| } |
| }) |
| } |
| } |
