testutil.js
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// Licensed to the Software Freedom Conservancy (SFC) under one
// or more contributor license agreements. See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership. The SFC licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License. You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied. See the License for the
// specific language governing permissions and limitations
// under the License.
'use strict';
const assert = require('assert');
const sinon = require('sinon');
class StubError extends Error {
constructor(opt_msg) {
super(opt_msg);
this.name = this.constructor.name;
}
}
exports.StubError = StubError;
exports.throwStubError = function() {
throw new StubError;
};
exports.assertIsStubError = function(value) {
assert.ok(value instanceof StubError, value + ' is not a ' + StubError.name);
};
exports.assertIsInstance = function(ctor, value) {
assert.ok(value instanceof ctor, 'Not a ' + ctor.name + ': ' + value);
};
function callbackPair(cb, eb) {
if (cb && eb) {
throw new TypeError('can only specify one of callback or errback');
}
let callback = cb ? sinon.spy(cb) : sinon.spy();
let errback = eb ? sinon.spy(eb) : sinon.spy();
function assertCallback() {
assert.ok(callback.called, 'callback not called');
assert.ok(!errback.called, 'errback called');
if (callback.threw()) {
throw callback.exceptions[0];
}
}
function assertErrback() {
assert.ok(!callback.called, 'callback called');
assert.ok(errback.called, 'errback not called');
if (errback.threw()) {
throw errback.exceptions[0];
}
}
function assertNeither() {
assert.ok(!callback.called, 'callback called');
assert.ok(!errback.called, 'errback called');
}
return {
callback,
errback,
assertCallback,
assertErrback,
assertNeither
};
}
exports.callbackPair = callbackPair;
exports.callbackHelper = function(cb) {
let pair = callbackPair(cb);
let wrapped = pair.callback.bind(null);
wrapped.assertCalled = () => pair.assertCallback();
wrapped.assertNotCalled = () => pair.assertNeither();
return wrapped;
};