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test.js
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test.js
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'use strict';
var util = require('util');
var assert = require('assert');
var EventEmitter = require('events').EventEmitter;
var fnName = require('fn-name');
var claim = require('claim');
function Test(title, fn) {
if (!(this instanceof Test)) {
return new Test(title, fn);
}
if (typeof title !== 'string') {
fn = title;
title = null;
}
EventEmitter.call(this);
this.title = title || fnName(fn) || '[anonymous]';
this.fn = fn;
this.assertCount = 0;
this.planCount = null;
}
util.inherits(Test, EventEmitter);
module.exports = Test;
Test.prototype._assert = function () {
this.assertCount++;
if (this.assertCount === this.planCount) {
setImmediate(this.exit.bind(this));
}
};
// TODO: find a better way to count assertions
// decorate the `claim` methods with our assert counter
Object.keys(claim).forEach(function (el) {
Test.prototype[el] = function () {
this._assert();
try {
claim[el].apply(claim, arguments);
} catch (err) {
this.assertError = err;
}
};
});
Test.prototype.plan = function (count) {
if (typeof count !== 'number') {
throw new TypeError('Expected a number');
}
this.planCount = count;
};
Test.prototype.skip = function () {
this.skipTest = true;
};
Test.prototype.run = function (cb) {
this.cb = cb;
if (!this.fn || this.skipTest) {
this.exit();
}
try {
var ret = this.fn(this);
if (ret && typeof ret.then === 'function') {
ret.then(this.exit.bind(this)).catch(function (err) {
this.assertError = new assert.AssertionError({
actual: err,
message: 'Promise rejected → ' + err,
operator: 'promise',
stackStartFunction: this
});
this.exit();
}.bind(this));
}
} catch (err) {
this.assertError = err;
this.exit();
}
};
Test.prototype.end = function () {
if (this.endCalled) {
throw new Error('.end() called more than once');
}
this.endCalled = true;
this.exit();
};
Test.prototype.exit = function () {
if (this.planCount !== null && this.planCount !== this.assertCount) {
this.assertError = new assert.AssertionError({
actual: this.assertCount,
expected: this.planCount,
message: 'Assertion count does not match planned',
operator: 'plan',
// TODO: find out why it doesn't show any stack
stackStartFunction: this.fn
});
}
if (!this.ended) {
this.ended = true;
setImmediate(function () {
this.cb(this.assertError);
}.bind(this));
}
};