forked from TrueCloudLab/restic
108 lines
3.7 KiB
Go
108 lines
3.7 KiB
Go
/*
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Copyright 2017 Google Inc. All Rights Reserved.
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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 spanner
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import (
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"errors"
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"fmt"
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"reflect"
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"testing"
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"time"
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"github.com/golang/protobuf/proto"
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"github.com/golang/protobuf/ptypes"
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"golang.org/x/net/context"
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edpb "google.golang.org/genproto/googleapis/rpc/errdetails"
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"google.golang.org/grpc"
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"google.golang.org/grpc/codes"
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"google.golang.org/grpc/metadata"
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)
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// Test if runRetryable loop deals with various errors correctly.
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func TestRetry(t *testing.T) {
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if testing.Short() {
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t.SkipNow()
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}
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responses := []error{
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grpc.Errorf(codes.Internal, "transport is closing"),
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grpc.Errorf(codes.Unknown, "unexpected EOF"),
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grpc.Errorf(codes.Internal, "stream terminated by RST_STREAM with error code: 2"),
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grpc.Errorf(codes.Unavailable, "service is currently unavailable"),
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errRetry(fmt.Errorf("just retry it")),
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}
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err := runRetryable(context.Background(), func(ct context.Context) error {
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var r error
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if len(responses) > 0 {
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r = responses[0]
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responses = responses[1:]
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}
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return r
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})
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if err != nil {
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t.Errorf("runRetryable should be able to survive all retryable errors, but it returns %v", err)
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}
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// Unretryable errors
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injErr := errors.New("this is unretryable")
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err = runRetryable(context.Background(), func(ct context.Context) error {
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return injErr
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})
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if wantErr := toSpannerError(injErr); !reflect.DeepEqual(err, wantErr) {
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t.Errorf("runRetryable returns error %v, want %v", err, wantErr)
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}
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// Timeout
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ctx, cancel := context.WithTimeout(context.Background(), time.Second)
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defer cancel()
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retryErr := errRetry(fmt.Errorf("still retrying"))
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err = runRetryable(ctx, func(ct context.Context) error {
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// Expect to trigger timeout in retryable runner after 10 executions.
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<-time.After(100 * time.Millisecond)
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// Let retryable runner to retry so that timeout will eventually happen.
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return retryErr
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})
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// Check error code and error message
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if wantErrCode, wantErr := codes.DeadlineExceeded, errContextCanceled(ctx, retryErr); ErrCode(err) != wantErrCode || !reflect.DeepEqual(err, wantErr) {
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t.Errorf("<err code, err>=\n<%v, %v>, want:\n<%v, %v>", ErrCode(err), err, wantErrCode, wantErr)
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}
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// Cancellation
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ctx, cancel = context.WithCancel(context.Background())
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retries := 3
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retryErr = errRetry(fmt.Errorf("retry before cancel"))
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err = runRetryable(ctx, func(ct context.Context) error {
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retries--
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if retries == 0 {
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cancel()
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}
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return retryErr
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})
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// Check error code, error message, retry count
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if wantErrCode, wantErr := codes.Canceled, errContextCanceled(ctx, retryErr); ErrCode(err) != wantErrCode || !reflect.DeepEqual(err, wantErr) || retries != 0 {
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t.Errorf("<err code, err, retries>=\n<%v, %v, %v>, want:\n<%v, %v, %v>", ErrCode(err), err, retries, wantErrCode, wantErr, 0)
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}
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}
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func TestRetryInfo(t *testing.T) {
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b, _ := proto.Marshal(&edpb.RetryInfo{
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RetryDelay: ptypes.DurationProto(time.Second),
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})
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trailers := map[string]string{
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retryInfoKey: string(b),
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}
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gotDelay, ok := extractRetryDelay(errRetry(toSpannerErrorWithMetadata(grpc.Errorf(codes.Aborted, ""), metadata.New(trailers))))
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if !ok || !reflect.DeepEqual(time.Second, gotDelay) {
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t.Errorf("<ok, retryDelay> = <%t, %v>, want <true, %v>", ok, gotDelay, time.Second)
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}
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}
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