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authorMatt A. Tobin <email@mattatobin.com>2018-02-10 02:51:36 -0500
committerMatt A. Tobin <email@mattatobin.com>2018-02-10 02:51:36 -0500
commit37d5300335d81cecbecc99812747a657588c63eb (patch)
tree765efa3b6a56bb715d9813a8697473e120436278 /toolkit/jetpack/sdk/test.js
parentb2bdac20c02b12f2057b9ef70b0a946113a00e00 (diff)
parent4fb11cd5966461bccc3ed1599b808237be6b0de9 (diff)
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Merge branch 'ext-work'
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diff --git a/toolkit/jetpack/sdk/test.js b/toolkit/jetpack/sdk/test.js
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+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+"use strict";
+
+module.metadata = {
+ "stability": "unstable"
+};
+
+const { Cu } = require("chrome");
+const { Task } = require("resource://gre/modules/Task.jsm", {});
+const { defer } = require("sdk/core/promise");
+const BaseAssert = require("sdk/test/assert").Assert;
+const { isFunction, isObject, isGenerator } = require("sdk/lang/type");
+const { extend } = require("sdk/util/object");
+
+exports.Assert = BaseAssert;
+
+/**
+ * Function takes test `suite` object in CommonJS format and defines all of the
+ * tests from that suite and nested suites in a jetpack format on a given
+ * `target` object. Optionally third argument `prefix` can be passed to prefix
+ * all the test names.
+ */
+function defineTestSuite(target, suite, prefix) {
+ prefix = prefix || "";
+ // If suite defines `Assert` that's what `assert` object have to be created
+ // from and passed to a test function (This allows custom assertion functions)
+ // See for details: http://wiki.commonjs.org/wiki/Unit_Testing/1.1
+ let Assert = suite.Assert || BaseAssert;
+ // Going through each item in the test suite and wrapping it into a
+ // Jetpack test format.
+ Object.keys(suite).forEach(function(key) {
+ // If name starts with test then it's a test function or suite.
+ if (key.indexOf("test") === 0) {
+ let test = suite[key];
+
+ // For each test function so we create a wrapper test function in a
+ // jetpack format and copy that to a `target` exports.
+ if (isFunction(test)) {
+
+ // Since names of the test may match across suites we use full object
+ // path as a name to avoid overriding same function.
+ target[prefix + key] = function(options) {
+
+ // Creating `assert` functions for this test.
+ let assert = Assert(options);
+ assert.end = () => options.done();
+
+ // If test function is a generator use a task JS to allow yield-ing
+ // style test runs.
+ if (isGenerator(test)) {
+ options.waitUntilDone();
+ Task.spawn(test.bind(null, assert)).
+ catch(assert.fail).
+ then(assert.end);
+ }
+
+ // If CommonJS test function expects more than one argument
+ // it means that test is async and second argument is a callback
+ // to notify that test is finished.
+ else if (1 < test.length) {
+ // Letting test runner know that test is executed async and
+ // creating a callback function that CommonJS tests will call
+ // once it's done.
+ options.waitUntilDone();
+ test(assert, function() {
+ options.done();
+ });
+ }
+
+ // Otherwise CommonJS test is synchronous so we call it only with
+ // one argument.
+ else {
+ test(assert);
+ }
+ }
+ }
+
+ // If it's an object then it's a test suite containing test function
+ // and / or nested test suites. In that case we just extend prefix used
+ // and call this function to copy and wrap tests from nested suite.
+ else if (isObject(test)) {
+ // We need to clone `tests` instead of modifying it, since it's very
+ // likely that it is frozen (usually test suites imported modules).
+ test = extend(Object.prototype, test, {
+ Assert: test.Assert || Assert
+ });
+ defineTestSuite(target, test, prefix + key + ".");
+ }
+ }
+ });
+}
+
+/**
+ * This function is a CommonJS test runner function, but since Jetpack test
+ * runner and test format is different from CommonJS this function shims given
+ * `exports` with all its tests into a Jetpack test format so that the built-in
+ * test runner will be able to run CommonJS test without manual changes.
+ */
+exports.run = function run(exports) {
+ // We can't leave old properties on exports since those are test in a CommonJS
+ // format that why we move everything to a new `suite` object.
+ let suite = {};
+ Object.keys(exports).forEach(function(key) {
+ suite[key] = exports[key];
+ delete exports[key];
+ });
+
+ // Now we wrap all the CommonJS tests to a Jetpack format and define
+ // those to a given `exports` object since that where jetpack test runner
+ // will look for them.
+ defineTestSuite(exports, suite);
+};