| // Copyright 2011 The Closure Library Authors. 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. |
| |
| goog.provide('goog.math.ExponentialBackoffTest'); |
| goog.setTestOnly('goog.math.ExponentialBackoffTest'); |
| |
| goog.require('goog.math.ExponentialBackoff'); |
| goog.require('goog.testing.jsunit'); |
| |
| var INITIAL_VALUE = 1; |
| |
| var MAX_VALUE = 10; |
| |
| function assertValueAndCount(value, count, backoff) { |
| assertEquals('Wrong value', value, backoff.getValue()); |
| assertEquals('Wrong backoff count', count, backoff.getBackoffCount()); |
| } |
| |
| |
| function createBackoff() { |
| return new goog.math.ExponentialBackoff(INITIAL_VALUE, MAX_VALUE); |
| } |
| |
| |
| function testInitialState() { |
| var backoff = createBackoff(); |
| assertValueAndCount(INITIAL_VALUE, 0, backoff); |
| } |
| |
| |
| function testBackoff() { |
| var backoff = createBackoff(); |
| backoff.backoff(); |
| assertValueAndCount(2 /* value */, 1 /* count */, backoff); |
| backoff.backoff(); |
| assertValueAndCount(4 /* value */, 2 /* count */, backoff); |
| backoff.backoff(); |
| assertValueAndCount(8 /* value */, 3 /* count */, backoff); |
| backoff.backoff(); |
| assertValueAndCount(MAX_VALUE, 4 /* count */, backoff); |
| backoff.backoff(); |
| assertValueAndCount(MAX_VALUE, 5 /* count */, backoff); |
| } |
| |
| |
| function testReset() { |
| var backoff = createBackoff(); |
| backoff.backoff(); |
| backoff.reset(); |
| assertValueAndCount(INITIAL_VALUE, 0 /* count */, backoff); |
| |
| } |