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- 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);
-
- 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;
-
- 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
- }
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