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utils.spec.ts
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utils.spec.ts
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// Copyright (c) Jupyter Development Team.
// Distributed under the terms of the Modified BSD License.
import * as widgets from '@jupyter-widgets/base';
import { ManagerBase } from '@jupyter-widgets/base-manager';
import * as services from '@jupyterlab/services';
import * as Backbone from 'backbone';
let numComms = 0;
export class MockComm {
target_name = 'dummy';
constructor() {
this.comm_id = `mock-comm-id-${numComms}`;
numComms += 1;
}
on_close(fn: Function | null) {
this._on_close = fn;
}
on_msg(fn: Function | null) {
this._on_msg = fn;
}
_process_msg(msg: services.KernelMessage.ICommMsgMsg) {
if (this._on_msg) {
return this._on_msg(msg);
} else {
return Promise.resolve();
}
}
close(): string {
if (this._on_close) {
this._on_close();
}
return 'dummy';
}
send(): string {
return 'dummy';
}
open(): string {
return 'dummy';
}
comm_id: string;
_on_msg: Function | null = null;
_on_close: Function | null = null;
}
export class DummyManager extends ManagerBase {
constructor() {
super();
this.el = window.document.createElement('div');
}
display_view(
msg: services.KernelMessage.IMessage,
view: Backbone.View<Backbone.Model>,
options: any
) {
// TODO: make this a spy
// TODO: return an html element
return Promise.resolve(view).then(view => {
this.el.appendChild(view.el);
view.on('remove', () => console.log('view removed', view));
return view.el;
});
}
protected loadClass(
className: string,
moduleName: string,
moduleVersion: string
): Promise<any> {
if (moduleName === '@jupyter-widgets/base') {
if ((widgets as any)[className]) {
return Promise.resolve((widgets as any)[className]);
} else {
return Promise.reject(`Cannot find class ${className}`);
}
} else if (moduleName === 'jupyter-datawidgets') {
if (this.testClasses[className]) {
return Promise.resolve(this.testClasses[className]);
} else {
return Promise.reject(`Cannot find class ${className}`);
}
} else {
return Promise.reject(`Cannot find module ${moduleName}`);
}
}
_get_comm_info() {
return Promise.resolve({});
}
_create_comm() {
return Promise.resolve(new MockComm());
}
el: HTMLElement;
testClasses: { [key: string]: any } = {};
}
export interface Constructor<T> {
new (attributes?: any, options?: any): T;
}
export function createTestModel<T extends widgets.WidgetModel>(
constructor: Constructor<T>,
attributes?: any
): T {
let id = widgets.uuid();
let widget_manager = new DummyManager();
let modelOptions = {
widget_manager: widget_manager,
model_id: id
};
return new constructor(attributes, modelOptions);
}