48 lines
1.3 KiB
JavaScript
48 lines
1.3 KiB
JavaScript
/*
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* Copyright (c) 2012 Mathieu Turcotte
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* Licensed under the MIT license.
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*/
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var sinon = require('sinon');
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var FibonacciBackoffStrategy = require('../lib/strategy/fibonacci');
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exports["FibonacciBackoffStrategy"] = {
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setUp: function(callback) {
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this.strategy = new FibonacciBackoffStrategy({
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initialDelay: 10,
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maxDelay: 1000
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});
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callback();
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},
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"backoff delays should follow a Fibonacci sequence": function(test) {
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// Fibonacci sequence: x[i] = x[i-1] + x[i-2].
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var expectedDelays = [10, 10, 20, 30, 50, 80, 130, 210, 340, 550, 890, 1000];
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var actualDelays = [];
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for (var i = 0; i < expectedDelays.length; i++) {
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actualDelays.push(this.strategy.next());
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}
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test.deepEqual(expectedDelays, actualDelays,
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'Generated delays should follow a Fibonacci sequence.');
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test.done();
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},
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"backoff delays should restart from the initial delay after reset": function(test) {
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var strategy = new FibonacciBackoffStrategy({
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initialDelay: 10,
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maxDelay: 1000
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});
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strategy.next();
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strategy.reset();
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var backoffDelay = strategy.next();
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test.equals(backoffDelay, 10,
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'Strategy should return the initial delay after reset.');
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test.done();
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}
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};
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