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/*
*
* Copyright 2018 gRPC authors.
*
* 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 health
import (
"context"
"errors"
"reflect"
"testing"
"time"
"google.golang.org/grpc/connectivity"
)
const defaultTestTimeout = 10 * time.Second
func (s) TestClientHealthCheckBackoff(t *testing.T) {
const maxRetries = 5
var want []time.Duration
for i := 0; i < maxRetries; i++ {
want = append(want, time.Duration(i+1)*time.Second)
}
var got []time.Duration
newStream := func(string) (interface{}, error) {
if len(got) < maxRetries {
return nil, errors.New("backoff")
}
return nil, nil
}
oldBackoffFunc := backoffFunc
backoffFunc = func(ctx context.Context, retries int) bool {
got = append(got, time.Duration(retries+1)*time.Second)
return true
}
defer func() { backoffFunc = oldBackoffFunc }()
ctx, cancel := context.WithTimeout(context.Background(), defaultTestTimeout)
defer cancel()
clientHealthCheck(ctx, newStream, func(connectivity.State, error) {}, "test")
if !reflect.DeepEqual(got, want) {
t.Fatalf("Backoff durations for %v retries are %v. (expected: %v)", maxRetries, got, want)
}
}
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