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Allow option parameter to be readonly object #1

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Allow option parameter to be readonly object #1

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8 changes: 3 additions & 5 deletions index.js
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Original file line number Diff line number Diff line change
Expand Up @@ -6,15 +6,13 @@ var mischief = require('./mischief');
// prototype defined here.
var chaos_monkeyware = module.exports = function (options) {

// Set default values for those not provided by user.
options = options || {};
options.probability = options.probability || 0.1;
var probability = options.probability || 0.1;

return function middleware (req, res, next) {
var mischiefNames, mischiefName;

// First, decide whether to do anything at all.
if (Math.random() > 1 - options.probability) {
if (Math.random() > 1 - probability) {

// Select a mischief at random.
mischiefNames = Object.keys(mischief);
Expand All @@ -24,7 +22,7 @@ var chaos_monkeyware = module.exports = function (options) {
// that this failure was... special.
res.setHeader('ChaosMonkeyWare', mischiefName);

if (options.logger) {
if (options && typeof options.logger === 'function') {
options.logger('ChaosMonkeyWare mischief: ' + mischiefName);
}

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