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vendor/cloud.google.com/go/bigtable/internal/gax/invoke_test.go

@@ -0,0 +1,49 @@
+/*
+Copyright 2015 Google Inc. All Rights Reserved.
+
+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 gax
+
+import (
+	"testing"
+	"time"
+
+	"golang.org/x/net/context"
+	"google.golang.org/grpc"
+	"google.golang.org/grpc/codes"
+)
+
+func TestRandomizedDelays(t *testing.T) {
+	max := 200 * time.Millisecond
+	settings := []CallOption{
+		WithRetryCodes([]codes.Code{codes.Unavailable, codes.DeadlineExceeded}),
+		WithDelayTimeoutSettings(10*time.Millisecond, max, 1.5),
+	}
+
+	deadline := time.Now().Add(1 * time.Second)
+	ctx, _ := context.WithDeadline(context.Background(), deadline)
+	var invokeTime time.Time
+	Invoke(ctx, func(childCtx context.Context) error {
+		// Keep failing, make sure we never slept more than max (plus a fudge factor)
+		if !invokeTime.IsZero() {
+			if got, want := time.Since(invokeTime), max; got > (want + 20*time.Millisecond) {
+				t.Fatalf("Slept too long. Got: %v, want: %v", got, max)
+			}
+		}
+		invokeTime = time.Now()
+		// Workaround for `go vet`: https://github.com/grpc/grpc-go/issues/90
+		errf := grpc.Errorf
+		return errf(codes.Unavailable, "")
+	}, settings...)
+}