added unit testing, and started implementing unit tests...phew

node_modules/mocha/lib/suite.js

@@ -0,0 +1,640 @@
+'use strict';
+
+/**
+ * Module dependencies.
+ */
+var EventEmitter = require('events').EventEmitter;
+var Hook = require('./hook');
+var utils = require('./utils');
+var inherits = utils.inherits;
+var debug = require('debug')('mocha:suite');
+var milliseconds = require('ms');
+var errors = require('./errors');
+var createInvalidArgumentTypeError = errors.createInvalidArgumentTypeError;
+
+/**
+ * Expose `Suite`.
+ */
+
+exports = module.exports = Suite;
+
+/**
+ * Create a new `Suite` with the given `title` and parent `Suite`.
+ *
+ * @public
+ * @param {Suite} parent - Parent suite (required!)
+ * @param {string} title - Title
+ * @return {Suite}
+ */
+Suite.create = function(parent, title) {
+  var suite = new Suite(title, parent.ctx);
+  suite.parent = parent;
+  title = suite.fullTitle();
+  parent.addSuite(suite);
+  return suite;
+};
+
+/**
+ * Constructs a new `Suite` instance with the given `title`, `ctx`, and `isRoot`.
+ *
+ * @public
+ * @class
+ * @extends EventEmitter
+ * @see {@link https://nodejs.org/api/events.html#events_class_eventemitter|EventEmitter}
+ * @param {string} title - Suite title.
+ * @param {Context} parentContext - Parent context instance.
+ * @param {boolean} [isRoot=false] - Whether this is the root suite.
+ */
+function Suite(title, parentContext, isRoot) {
+  if (!utils.isString(title)) {
+    throw createInvalidArgumentTypeError(
+      'Suite argument "title" must be a string. Received type "' +
+        typeof title +
+        '"',
+      'title',
+      'string'
+    );
+  }
+  this.title = title;
+  function Context() {}
+  Context.prototype = parentContext;
+  this.ctx = new Context();
+  this.suites = [];
+  this.tests = [];
+  this.pending = false;
+  this._beforeEach = [];
+  this._beforeAll = [];
+  this._afterEach = [];
+  this._afterAll = [];
+  this.root = isRoot === true;
+  this._timeout = 2000;
+  this._enableTimeouts = true;
+  this._slow = 75;
+  this._bail = false;
+  this._retries = -1;
+  this._onlyTests = [];
+  this._onlySuites = [];
+  this.delayed = false;
+
+  this.on('newListener', function(event) {
+    if (deprecatedEvents[event]) {
+      utils.deprecate(
+        'Event "' +
+          event +
+          '" is deprecated.  Please let the Mocha team know about your use case: https://git.io/v6Lwm'
+      );
+    }
+  });
+}
+
+/**
+ * Inherit from `EventEmitter.prototype`.
+ */
+inherits(Suite, EventEmitter);
+
+/**
+ * Return a clone of this `Suite`.
+ *
+ * @private
+ * @return {Suite}
+ */
+Suite.prototype.clone = function() {
+  var suite = new Suite(this.title);
+  debug('clone');
+  suite.ctx = this.ctx;
+  suite.timeout(this.timeout());
+  suite.retries(this.retries());
+  suite.enableTimeouts(this.enableTimeouts());
+  suite.slow(this.slow());
+  suite.bail(this.bail());
+  return suite;
+};
+
+/**
+ * Set or get timeout `ms` or short-hand such as "2s".
+ *
+ * @private
+ * @param {number|string} ms
+ * @return {Suite|number} for chaining
+ */
+Suite.prototype.timeout = function(ms) {
+  if (!arguments.length) {
+    return this._timeout;
+  }
+  if (ms.toString() === '0') {
+    this._enableTimeouts = false;
+  }
+  if (typeof ms === 'string') {
+    ms = milliseconds(ms);
+  }
+  debug('timeout %d', ms);
+  this._timeout = parseInt(ms, 10);
+  return this;
+};
+
+/**
+ * Set or get number of times to retry a failed test.
+ *
+ * @private
+ * @param {number|string} n
+ * @return {Suite|number} for chaining
+ */
+Suite.prototype.retries = function(n) {
+  if (!arguments.length) {
+    return this._retries;
+  }
+  debug('retries %d', n);
+  this._retries = parseInt(n, 10) || 0;
+  return this;
+};
+
+/**
+ * Set or get timeout to `enabled`.
+ *
+ * @private
+ * @param {boolean} enabled
+ * @return {Suite|boolean} self or enabled
+ */
+Suite.prototype.enableTimeouts = function(enabled) {
+  if (!arguments.length) {
+    return this._enableTimeouts;
+  }
+  debug('enableTimeouts %s', enabled);
+  this._enableTimeouts = enabled;
+  return this;
+};
+
+/**
+ * Set or get slow `ms` or short-hand such as "2s".
+ *
+ * @private
+ * @param {number|string} ms
+ * @return {Suite|number} for chaining
+ */
+Suite.prototype.slow = function(ms) {
+  if (!arguments.length) {
+    return this._slow;
+  }
+  if (typeof ms === 'string') {
+    ms = milliseconds(ms);
+  }
+  debug('slow %d', ms);
+  this._slow = ms;
+  return this;
+};
+
+/**
+ * Set or get whether to bail after first error.
+ *
+ * @private
+ * @param {boolean} bail
+ * @return {Suite|number} for chaining
+ */
+Suite.prototype.bail = function(bail) {
+  if (!arguments.length) {
+    return this._bail;
+  }
+  debug('bail %s', bail);
+  this._bail = bail;
+  return this;
+};
+
+/**
+ * Check if this suite or its parent suite is marked as pending.
+ *
+ * @private
+ */
+Suite.prototype.isPending = function() {
+  return this.pending || (this.parent && this.parent.isPending());
+};
+
+/**
+ * Generic hook-creator.
+ * @private
+ * @param {string} title - Title of hook
+ * @param {Function} fn - Hook callback
+ * @returns {Hook} A new hook
+ */
+Suite.prototype._createHook = function(title, fn) {
+  var hook = new Hook(title, fn);
+  hook.parent = this;
+  hook.timeout(this.timeout());
+  hook.retries(this.retries());
+  hook.enableTimeouts(this.enableTimeouts());
+  hook.slow(this.slow());
+  hook.ctx = this.ctx;
+  hook.file = this.file;
+  return hook;
+};
+
+/**
+ * Run `fn(test[, done])` before running tests.
+ *
+ * @private
+ * @param {string} title
+ * @param {Function} fn
+ * @return {Suite} for chaining
+ */
+Suite.prototype.beforeAll = function(title, fn) {
+  if (this.isPending()) {
+    return this;
+  }
+  if (typeof title === 'function') {
+    fn = title;
+    title = fn.name;
+  }
+  title = '"before all" hook' + (title ? ': ' + title : '');
+
+  var hook = this._createHook(title, fn);
+  this._beforeAll.push(hook);
+  this.emit(constants.EVENT_SUITE_ADD_HOOK_BEFORE_ALL, hook);
+  return this;
+};
+
+/**
+ * Run `fn(test[, done])` after running tests.
+ *
+ * @private
+ * @param {string} title
+ * @param {Function} fn
+ * @return {Suite} for chaining
+ */
+Suite.prototype.afterAll = function(title, fn) {
+  if (this.isPending()) {
+    return this;
+  }
+  if (typeof title === 'function') {
+    fn = title;
+    title = fn.name;
+  }
+  title = '"after all" hook' + (title ? ': ' + title : '');
+
+  var hook = this._createHook(title, fn);
+  this._afterAll.push(hook);
+  this.emit(constants.EVENT_SUITE_ADD_HOOK_AFTER_ALL, hook);
+  return this;
+};
+
+/**
+ * Run `fn(test[, done])` before each test case.
+ *
+ * @private
+ * @param {string} title
+ * @param {Function} fn
+ * @return {Suite} for chaining
+ */
+Suite.prototype.beforeEach = function(title, fn) {
+  if (this.isPending()) {
+    return this;
+  }
+  if (typeof title === 'function') {
+    fn = title;
+    title = fn.name;
+  }
+  title = '"before each" hook' + (title ? ': ' + title : '');
+
+  var hook = this._createHook(title, fn);
+  this._beforeEach.push(hook);
+  this.emit(constants.EVENT_SUITE_ADD_HOOK_BEFORE_EACH, hook);
+  return this;
+};
+
+/**
+ * Run `fn(test[, done])` after each test case.
+ *
+ * @private
+ * @param {string} title
+ * @param {Function} fn
+ * @return {Suite} for chaining
+ */
+Suite.prototype.afterEach = function(title, fn) {
+  if (this.isPending()) {
+    return this;
+  }
+  if (typeof title === 'function') {
+    fn = title;
+    title = fn.name;
+  }
+  title = '"after each" hook' + (title ? ': ' + title : '');
+
+  var hook = this._createHook(title, fn);
+  this._afterEach.push(hook);
+  this.emit(constants.EVENT_SUITE_ADD_HOOK_AFTER_EACH, hook);
+  return this;
+};
+
+/**
+ * Add a test `suite`.
+ *
+ * @private
+ * @param {Suite} suite
+ * @return {Suite} for chaining
+ */
+Suite.prototype.addSuite = function(suite) {
+  suite.parent = this;
+  suite.root = false;
+  suite.timeout(this.timeout());
+  suite.retries(this.retries());
+  suite.enableTimeouts(this.enableTimeouts());
+  suite.slow(this.slow());
+  suite.bail(this.bail());
+  this.suites.push(suite);
+  this.emit(constants.EVENT_SUITE_ADD_SUITE, suite);
+  return this;
+};
+
+/**
+ * Add a `test` to this suite.
+ *
+ * @private
+ * @param {Test} test
+ * @return {Suite} for chaining
+ */
+Suite.prototype.addTest = function(test) {
+  test.parent = this;
+  test.timeout(this.timeout());
+  test.retries(this.retries());
+  test.enableTimeouts(this.enableTimeouts());
+  test.slow(this.slow());
+  test.ctx = this.ctx;
+  this.tests.push(test);
+  this.emit(constants.EVENT_SUITE_ADD_TEST, test);
+  return this;
+};
+
+/**
+ * Return the full title generated by recursively concatenating the parent's
+ * full title.
+ *
+ * @memberof Suite
+ * @public
+ * @return {string}
+ */
+Suite.prototype.fullTitle = function() {
+  return this.titlePath().join(' ');
+};
+
+/**
+ * Return the title path generated by recursively concatenating the parent's
+ * title path.
+ *
+ * @memberof Suite
+ * @public
+ * @return {string}
+ */
+Suite.prototype.titlePath = function() {
+  var result = [];
+  if (this.parent) {
+    result = result.concat(this.parent.titlePath());
+  }
+  if (!this.root) {
+    result.push(this.title);
+  }
+  return result;
+};
+
+/**
+ * Return the total number of tests.
+ *
+ * @memberof Suite
+ * @public
+ * @return {number}
+ */
+Suite.prototype.total = function() {
+  return (
+    this.suites.reduce(function(sum, suite) {
+      return sum + suite.total();
+    }, 0) + this.tests.length
+  );
+};
+
+/**
+ * Iterates through each suite recursively to find all tests. Applies a
+ * function in the format `fn(test)`.
+ *
+ * @private
+ * @param {Function} fn
+ * @return {Suite}
+ */
+Suite.prototype.eachTest = function(fn) {
+  this.tests.forEach(fn);
+  this.suites.forEach(function(suite) {
+    suite.eachTest(fn);
+  });
+  return this;
+};
+
+/**
+ * This will run the root suite if we happen to be running in delayed mode.
+ * @private
+ */
+Suite.prototype.run = function run() {
+  if (this.root) {
+    this.emit(constants.EVENT_ROOT_SUITE_RUN);
+  }
+};
+
+/**
+ * Determines whether a suite has an `only` test or suite as a descendant.
+ *
+ * @private
+ * @returns {Boolean}
+ */
+Suite.prototype.hasOnly = function hasOnly() {
+  return (
+    this._onlyTests.length > 0 ||
+    this._onlySuites.length > 0 ||
+    this.suites.some(function(suite) {
+      return suite.hasOnly();
+    })
+  );
+};
+
+/**
+ * Filter suites based on `isOnly` logic.
+ *
+ * @private
+ * @returns {Boolean}
+ */
+Suite.prototype.filterOnly = function filterOnly() {
+  if (this._onlyTests.length) {
+    // If the suite contains `only` tests, run those and ignore any nested suites.
+    this.tests = this._onlyTests;
+    this.suites = [];
+  } else {
+    // Otherwise, do not run any of the tests in this suite.
+    this.tests = [];
+    this._onlySuites.forEach(function(onlySuite) {
+      // If there are other `only` tests/suites nested in the current `only` suite, then filter that `only` suite.
+      // Otherwise, all of the tests on this `only` suite should be run, so don't filter it.
+      if (onlySuite.hasOnly()) {
+        onlySuite.filterOnly();
+      }
+    });
+    // Run the `only` suites, as well as any other suites that have `only` tests/suites as descendants.
+    var onlySuites = this._onlySuites;
+    this.suites = this.suites.filter(function(childSuite) {
+      return onlySuites.indexOf(childSuite) !== -1 || childSuite.filterOnly();
+    });
+  }
+  // Keep the suite only if there is something to run
+  return this.tests.length > 0 || this.suites.length > 0;
+};
+
+/**
+ * Adds a suite to the list of subsuites marked `only`.
+ *
+ * @private
+ * @param {Suite} suite
+ */
+Suite.prototype.appendOnlySuite = function(suite) {
+  this._onlySuites.push(suite);
+};
+
+/**
+ * Adds a test to the list of tests marked `only`.
+ *
+ * @private
+ * @param {Test} test
+ */
+Suite.prototype.appendOnlyTest = function(test) {
+  this._onlyTests.push(test);
+};
+
+/**
+ * Returns the array of hooks by hook name; see `HOOK_TYPE_*` constants.
+ * @private
+ */
+Suite.prototype.getHooks = function getHooks(name) {
+  return this['_' + name];
+};
+
+/**
+ * Cleans up the references to all the deferred functions
+ * (before/after/beforeEach/afterEach) and tests of a Suite.
+ * These must be deleted otherwise a memory leak can happen,
+ * as those functions may reference variables from closures,
+ * thus those variables can never be garbage collected as long
+ * as the deferred functions exist.
+ *
+ * @private
+ */
+Suite.prototype.cleanReferences = function cleanReferences() {
+  function cleanArrReferences(arr) {
+    for (var i = 0; i < arr.length; i++) {
+      delete arr[i].fn;
+    }
+  }
+
+  if (Array.isArray(this._beforeAll)) {
+    cleanArrReferences(this._beforeAll);
+  }
+
+  if (Array.isArray(this._beforeEach)) {
+    cleanArrReferences(this._beforeEach);
+  }
+
+  if (Array.isArray(this._afterAll)) {
+    cleanArrReferences(this._afterAll);
+  }
+
+  if (Array.isArray(this._afterEach)) {
+    cleanArrReferences(this._afterEach);
+  }
+
+  for (var i = 0; i < this.tests.length; i++) {
+    delete this.tests[i].fn;
+  }
+};
+
+var constants = utils.defineConstants(
+  /**
+   * {@link Suite}-related constants.
+   * @public
+   * @memberof Suite
+   * @alias constants
+   * @readonly
+   * @static
+   * @enum {string}
+   */
+  {
+    /**
+     * Event emitted after a test file has been loaded Not emitted in browser.
+     */
+    EVENT_FILE_POST_REQUIRE: 'post-require',
+    /**
+     * Event emitted before a test file has been loaded. In browser, this is emitted once an interface has been selected.
+     */
+    EVENT_FILE_PRE_REQUIRE: 'pre-require',
+    /**
+     * Event emitted immediately after a test file has been loaded. Not emitted in browser.
+     */
+    EVENT_FILE_REQUIRE: 'require',
+    /**
+     * Event emitted when `global.run()` is called (use with `delay` option)
+     */
+    EVENT_ROOT_SUITE_RUN: 'run',
+
+    /**
+     * Namespace for collection of a `Suite`'s "after all" hooks
+     */
+    HOOK_TYPE_AFTER_ALL: 'afterAll',
+    /**
+     * Namespace for collection of a `Suite`'s "after each" hooks
+     */
+    HOOK_TYPE_AFTER_EACH: 'afterEach',
+    /**
+     * Namespace for collection of a `Suite`'s "before all" hooks
+     */
+    HOOK_TYPE_BEFORE_ALL: 'beforeAll',
+    /**
+     * Namespace for collection of a `Suite`'s "before all" hooks
+     */
+    HOOK_TYPE_BEFORE_EACH: 'beforeEach',
+
+    // the following events are all deprecated
+
+    /**
+     * Emitted after an "after all" `Hook` has been added to a `Suite`. Deprecated
+     */
+    EVENT_SUITE_ADD_HOOK_AFTER_ALL: 'afterAll',
+    /**
+     * Emitted after an "after each" `Hook` has been added to a `Suite` Deprecated
+     */
+    EVENT_SUITE_ADD_HOOK_AFTER_EACH: 'afterEach',
+    /**
+     * Emitted after an "before all" `Hook` has been added to a `Suite` Deprecated
+     */
+    EVENT_SUITE_ADD_HOOK_BEFORE_ALL: 'beforeAll',
+    /**
+     * Emitted after an "before each" `Hook` has been added to a `Suite` Deprecated
+     */
+    EVENT_SUITE_ADD_HOOK_BEFORE_EACH: 'beforeEach',
+    /**
+     * Emitted after a child `Suite` has been added to a `Suite`. Deprecated
+     */
+    EVENT_SUITE_ADD_SUITE: 'suite',
+    /**
+     * Emitted after a `Test` has been added to a `Suite`. Deprecated
+     */
+    EVENT_SUITE_ADD_TEST: 'test'
+  }
+);
+
+/**
+ * @summary There are no known use cases for these events.
+ * @desc This is a `Set`-like object having all keys being the constant's string value and the value being `true`.
+ * @todo Remove eventually
+ * @type {Object<string,boolean>}
+ * @ignore
+ */
+var deprecatedEvents = Object.keys(constants)
+  .filter(function(constant) {
+    return constant.substring(0, 15) === 'EVENT_SUITE_ADD';
+  })
+  .reduce(function(acc, constant) {
+    acc[constants[constant]] = true;
+    return acc;
+  }, utils.createMap());
+
+Suite.constants = constants;