| package util |
| |
| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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. |
| */ |
| |
| import ( |
| "testing" |
| "time" |
| ) |
| |
| func TestNewBackoff(t *testing.T) { |
| min := 500 * time.Millisecond |
| max := 600 * time.Millisecond |
| fac := DefaultFactor |
| |
| bo, err := NewBackoff(min, max, fac) |
| |
| if err != nil { |
| t.Errorf("un-expected error. min: %v, max: %v, fac: %v - %v", min, max, fac, err) |
| } |
| |
| if bo == nil { |
| t.Errorf("un-expected error bo is nil, min: %v, max: %v, fac: %v - %v", min, max, fac, err) |
| } |
| |
| bo, err = NewBackoff(0, 0, 0) |
| |
| if err == nil { |
| t.Errorf("Expected errors passing invalid arguments to NewBackOff()") |
| } |
| |
| if bo != nil { |
| t.Errorf("un-expected error passing invalid arguments to NewBackOff(), 'bo' should be nil") |
| } |
| } |
| |
| func TestReset(t *testing.T) { |
| bo, err := NewBackoff(1, 2000000000, DefaultFactor) |
| |
| if err != nil { |
| t.Errorf("un-expected error: %v", err) |
| } |
| |
| val1 := bo.BackoffDuration() |
| val2 := bo.BackoffDuration() |
| |
| if val2 < val1 { |
| t.Errorf("expected val1: %v is less than val2: %v", val1, val2) |
| } |
| |
| bo.Reset() |
| |
| val3 := bo.BackoffDuration() |
| |
| if val3 > val2 { |
| t.Errorf("expected val3: %v is less than val2: %v", val3, val2) |
| } |
| } |
| |
| func TestBackoffDuration(t *testing.T) { |
| min := 100 * time.Nanosecond |
| max := 20000 * time.Nanosecond |
| fac := DefaultFactor |
| bo, err := NewBackoff(min, max, fac) |
| |
| if err != nil { |
| t.Errorf("un-expected error: %v", err) |
| } |
| dur := min |
| |
| val := bo.BackoffDuration() |
| if val < min { |
| t.Errorf("unexpected duration calculation, val: %v is less than min: %v", val, min) |
| } |
| |
| // 8 iterations with the default settings. |
| for i := 0; i < 8; i++ { |
| val = bo.BackoffDuration() |
| if val < dur { |
| t.Errorf("unexpected duration calculation, iteration: %v, val: %v <= dur: %v", i, val, dur) |
| } |
| dur = val |
| } |
| |
| // after 8 calls with the default settings, val should be '1m0s', DefaultMaxMS |
| if val != max { |
| t.Errorf("unexpected duration calculation, val: %v != : max: %v", val, max) |
| } |
| } |
| |
| func TestNewConstantBackoff(t *testing.T) { |
| bo := NewConstantBackoff(ConstantBackoffDuration) |
| |
| if bo.BackoffDuration() != ConstantBackoffDuration { |
| t.Errorf("unexepected duration, return value != %v", ConstantBackoffDuration) |
| } |
| } |