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common.js
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// Copyright Joyent, Inc. and other Node contributors. // // Permission is hereby granted, free of charge, to any person obtaining a // copy of this software and associated documentation files (the // "Software"), to deal in the Software without restriction, including // without limitation the rights to use, copy, modify, merge, publish, // distribute, sublicense, and/or sell copies of the Software, and to permit // persons to whom the Software is furnished to do so, subject to the // following conditions: // // The above copyright notice and this permission notice shall be included // in all copies or substantial portions of the Software. // // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS // OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN // NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, // DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR // OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE // USE OR OTHER DEALINGS IN THE SOFTWARE. var test = require('tape'); var assert = require('assert'); var noop = function() {}; var mustCallChecks = []; function runCallChecks(exitCode) { if (exitCode !== 0) return; var failed = filter(mustCallChecks, function(context) { if ('minimum' in context) { context.messageSegment = 'at least ' + context.minimum; return context.actual < context.minimum; } else { context.messageSegment = 'exactly ' + context.exact; return context.actual !== context.exact; } }); for (var i = 0; i < failed.length; i++) { var context = failed[i]; console.log('Mismatched %s function calls. Expected %s, actual %d.', context.name, context.messageSegment, context.actual); // IE8 has no .stack if (context.stack) console.log(context.stack.split('\n').slice(2).join('\n')); } assert.strictEqual(failed.length, 0); } exports.mustCall = function(fn, exact) { return _mustCallInner(fn, exact, 'exact'); }; function _mustCallInner(fn, criteria, field) { if (typeof criteria == 'undefined') criteria = 1; if (typeof fn === 'number') { criteria = fn; fn = noop; } else if (fn === undefined) { fn = noop; } if (typeof criteria !== 'number') throw new TypeError('Invalid ' + field + ' value: ' + criteria); var context = { actual: 0, stack: (new Error()).stack, name: fn.name || '<anonymous>' }; context[field] = criteria; // add the exit listener only once to avoid listener leak warnings if (mustCallChecks.length === 0) test.onFinish(function() { runCallChecks(0); }); mustCallChecks.push(context); return function() { context.actual++; return fn.apply(this, arguments); }; } exports.mustNotCall = function(msg) { return function mustNotCall() { assert.fail(msg || 'function should not have been called'); }; }; function filter(arr, fn) { if (arr.filter) return arr.filter(fn); var filtered = []; for (var i = 0; i < arr.length; i++) { if (fn(arr[i], i, arr)) filtered.push(arr[i]); } return filtered }