go-omaha/omaha/client/error_test.go
Michael Marineau c88c5916bb client: implement exponential backoff on temporary network errors
Uses a fuzzy timer to reduce chance of multiple clients synchronizing.
2017-06-02 18:44:29 -07:00

49 lines
1.2 KiB
Go

// Copyright 2017 CoreOS, Inc.
//
// 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 client
import (
"testing"
"time"
)
func init() {
// use quicker backoff for testing
backoffStart = time.Millisecond
backoffTries = 3
}
type tmpErr struct{}
func (e tmpErr) Error() string { return "fake temporary error" }
func (e tmpErr) Temporary() bool { return true }
func (e tmpErr) Timeout() bool { return false }
func TestExpNetBackoff(t *testing.T) {
tries := 0
err := expNetBackoff(func() error {
tries++
if tries < 2 {
return tmpErr{}
}
return nil
})
if err != nil {
t.Errorf("unexpected error: %v", err)
}
if tries != 2 {
t.Errorf("unexpected # of tries: %d", tries)
}
}