Add type definition based on API docs

.travis.yml

@@ -54,10 +54,17 @@ jobs:
     - env: EMBER_TRY_SCENARIO=ember-lts-2.18
     - env: EMBER_TRY_SCENARIO=ember-lts-3.4
     - env: EMBER_TRY_SCENARIO=ember-lts-3.8
+    - env: EMBER_TRY_SCENARIO=ember-lts-3.12
+    - env: EMBER_TRY_SCENARIO=ember-lts-3.16
     - env: EMBER_TRY_SCENARIO=ember-release
     - env: EMBER_TRY_SCENARIO=ember-beta
     - env: EMBER_TRY_SCENARIO=ember-canary
     - env: EMBER_TRY_SCENARIO=ember-default-with-jquery
+    - env: EMBER_TRY_SCENARIO=typescript-3.6
+      before_script: find tests/types -type f -name '*.ts' | xargs sed -i 's/@ts-expect-error/@ts-ignore/g'
+    - env: EMBER_TRY_SCENARIO=typescript-3.7
+      before_script: find tests/types -type f -name '*.ts' | xargs sed -i 's/@ts-expect-error/@ts-ignore/g'
+    - env: EMBER_TRY_SCENARIO=typescript-3.9
 
 script:
   - node_modules/.bin/ember try:one $EMBER_TRY_SCENARIO

addon/-task-group.js

@@ -5,7 +5,165 @@ import TaskStateMixin from './-task-state-mixin';
 import { propertyModifiers } from './-property-modifiers-mixin';
 import { gte } from 'ember-compatibility-helpers';
 
+/**
+ * "Task Groups" provide a means for applying
+ * task modifiers to groups of tasks. Once a {@linkcode Task} is declared
+ * as part of a group task, modifiers like `drop()` or `restartable()`
+ * will no longer affect the individual `Task`. Instead those
+ * modifiers can be applied to the entire group.
+ *
+ * ```js
+ * import { task, taskGroup } from 'ember-concurrency';
+ *
+ * export default Controller.extend({
+ *   chores: taskGroup().drop(),
+ *
+ *   mowLawn:       task(taskFn).group('chores'),
+ *   doDishes:      task(taskFn).group('chores'),
+ *   changeDiapers: task(taskFn).group('chores')
+ * });
+ * ```
+ *
+ *
+ * <style>
+ *   .ignore-this--this-is-here-to-hide-constructor,
+ *   #TaskGroup{ display: none }
+ * </style>
+ *
+ * @class TaskGroup
+ */
 export const TaskGroup = EmberObject.extend(TaskStateMixin, {
+  /**
+   * `true` if any current task instances are running.
+   *
+   * @memberof TaskGroup
+   * @member {boolean} isRunning
+   * @instance
+   * @readOnly
+   */
+
+  /**
+   * `true` if any future task instances are queued.
+   *
+   * @memberof TaskGroup
+   * @member {boolean} isQueued
+   * @instance
+   * @readOnly
+   */
+
+  /**
+   * `true` if the task group is not in the running or queued state.
+   *
+   * @memberof TaskGroup
+   * @member {boolean} isIdle
+   * @instance
+   * @readOnly
+   */
+
+  /**
+   * The current state of the task group: `"running"`, `"queued"` or `"idle"`.
+   *
+   * @memberof TaskGroup
+   * @member {string} state
+   * @instance
+   * @readOnly
+   */
+
+  /**
+   * The most recently started task instance.
+   *
+   * @memberof TaskGroup
+   * @member {TaskInstance} last
+   * @instance
+   * @readOnly
+   */
+
+  /**
+   * The most recent task instance that is currently running.
+   *
+   * @memberof TaskGroup
+   * @member {TaskInstance} lastRunning
+   * @instance
+   * @readOnly
+   */
+
+  /**
+   * The most recently performed task instance.
+   *
+   * @memberof TaskGroup
+   * @member {TaskInstance} lastPerformed
+   * @instance
+   * @readOnly
+   */
+
+  /**
+   * The most recent task instance that succeeded.
+   *
+   * @memberof TaskGroup
+   * @member {TaskInstance} lastSuccessful
+   * @instance
+   * @readOnly
+   */
+
+  /**
+   * The most recently completed task instance.
+   *
+   * @memberof TaskGroup
+   * @member {TaskInstance} lastComplete
+   * @instance
+   * @readOnly
+   */
+
+  /**
+   * The most recent task instance that errored.
+   *
+   * @memberof TaskGroup
+   * @member {TaskInstance} lastErrored
+   * @instance
+   * @readOnly
+   */
+
+  /**
+   * The most recently canceled task instance.
+   *
+   * @memberof TaskGroup
+   * @member {TaskInstance} lastCanceled
+   * @instance
+   * @readOnly
+   */
+
+  /**
+   * The most recent task instance that is incomplete.
+   *
+   * @memberof TaskGroup
+   * @member {TaskInstance} lastIncomplete
+   * @instance
+   * @readOnly
+   */
+
+  /**
+   * The number of times this task group has been performed.
+   *
+   * @memberof TaskGroup
+   * @member {number} performCount
+   * @instance
+   * @readOnly
+   */
+
+  /**
+   * Cancels all running or queued `TaskInstance`s for this task group.
+   * If you're trying to cancel a specific TaskInstance (rather
+   * than all of the instances running under this task group) call
+   * `.cancel()` on the specific TaskInstance.
+   *
+   * @method cancelAll
+   * @memberof TaskGroup
+   * @param {Object} [options]
+   * @param {string} [options.reason=.cancelAll() was explicitly called on the Task] - a descriptive reason the task group was cancelled
+   * @param {boolean} [options.resetState] - if true, will clear the task group state (`last*` and `performCount` properties will be set to initial values)
+   * @instance
+   */
+
   isTaskGroup: true,
 
   toString() {
@@ -17,6 +175,33 @@ export const TaskGroup = EmberObject.extend(TaskStateMixin, {
   isQueued: false,
 });
 
+/**
+ * "Task Groups" provide a means for applying
+ * task modifiers to groups of tasks. Once a {@linkcode Task} is declared
+ * as part of a group task, modifiers like `drop()` or `restartable()`
+ * will no longer affect the individual `Task`. Instead those
+ * modifiers can be applied to the entire group.
+ *
+ * ```js
+ * import { task, taskGroup } from 'ember-concurrency';
+ *
+ * export default Controller.extend({
+ *   chores: taskGroup().drop(),
+ *
+ *   mowLawn:       task(taskFn).group('chores'),
+ *   doDishes:      task(taskFn).group('chores'),
+ *   changeDiapers: task(taskFn).group('chores')
+ * });
+ * ```
+ *
+ *
+ * <style>
+ *   .ignore-this--this-is-here-to-hide-constructor,
+ *   #TaskGroupProperty{ display: none }
+ * </style>
+ *
+ * @class TaskGroupProperty
+ */
 export let TaskGroupProperty;
 
 if (gte('3.10.0-alpha.1')) {
@@ -25,4 +210,88 @@ if (gte('3.10.0-alpha.1')) {
   TaskGroupProperty = class extends _ComputedProperty {};
 }
 
+/**
+ * Configures the task group to cancel old currently task
+ * instances to make room for a new one to perform. Sets
+ * default maxConcurrency to 1.
+ *
+ * [See the Live Example](/#/docs/examples/route-tasks/1)
+ *
+ * @method restartable
+ * @memberof TaskGroupProperty
+ * @instance
+ */
+
+/**
+ * Configures the task group to run task instances
+ * one-at-a-time in the order they were `.perform()`ed.
+ * Sets default maxConcurrency to 1.
+ *
+ * @method enqueue
+ * @memberof TaskGroupProperty
+ * @instance
+ */
+
+/**
+ * Configures the task group to immediately cancel (i.e.
+ * drop) any task instances performed when the task group
+ * is already running at maxConcurrency. Sets default
+ * maxConcurrency to 1.
+ *
+ * @method drop
+ * @memberof TaskGroupProperty
+ * @instance
+ */
+
+/**
+ * Configures the task group to drop all but the most
+ * recently performed {@linkcode TaskInstance }.
+ *
+ * @method keepLatest
+ * @memberof TaskGroupProperty
+ * @instance
+ */
+
+/**
+ * Sets the maximum number of task instances that are
+ * allowed to run in this task group at the same time.
+ * By default, with no task modifiers applied, this number
+ * is Infinity (there is no limit to the number of tasks
+ * that can run at the same time).
+ * {@linkcode TaskGroupProperty#restartable .restartable()},
+ * {@linkcode TaskGroupProperty#enqueue .enqueue()}, and
+ * {@linkcode TaskGroupProperty#drop .drop()} set the
+ * default maxConcurrency to 1, but you can override this
+ * value to set the maximum number of concurrently running
+ * tasks to a number greater than 1.
+ *
+ * [See the AJAX Throttling example](/#/docs/examples/ajax-throttling)
+ *
+ * The example below uses a task group with `maxConcurrency(3)`
+ * to limit the number of concurrent AJAX requests (for anyone
+ * using tasks in this group) to 3.
+ *
+ * ```js
+ * ajax: taskGroup().maxConcurrency(3),
+ *
+ * doSomeAjax: task(function * (url) {
+ *   return Ember.$.getJSON(url).promise();
+ * }).group('ajax'),
+ *
+ * doSomeAjax: task(function * (url) {
+ *   return Ember.$.getJSON(url).promise();
+ * }).group('ajax'),
+ *
+ * elsewhere() {
+ *   this.get('doSomeAjax').perform("http://www.example.com/json");
+ * },
+ * ```
+ *
+ * @method maxConcurrency
+ * @memberof TaskGroupProperty
+ * @param {Number} n The maximum number of concurrently running tasks
+ * @instance
+ */
+
+
 objectAssign(TaskGroupProperty.prototype, propertyModifiers);