@tdb/util/src/helpers/mouse/mouse.test.ts

Shared helpers and utilities.

import { expect } from 'chai';
import { Observable, Subject } from 'rxjs';
import { takeUntil } from 'rxjs/operators';
import { mouse } from '.';

describe('mouse', () => {
  describe('events$', () => {
    it('fromProps', () => {
      // NB: Testing for typescript error on `takeUtil`.
      const props: mouse.IMouseEventProps = {};
      const events = mouse.fromProps(props);
      const unmounted$ = new Subject();
      events.events$.pipe(takeUntil(unmounted$));
    });
  });

  describe('handler', () => {
    it('single handler', () => {
      const res = mouse.handle('CLICK', e => true);
      expect(res).to.be.an.instanceof(Function);
    });

    it('multiple handlers', () => {
      const res = mouse.handle('CLICK', e => true, e => false);
      expect(res).to.be.an.instanceof(Function);
    });

    it('no handlers (undefined)', () => {
      const res = mouse.handle('CLICK');
      expect(res).to.eql(undefined);
    });
  });

  describe('handlers', () => {
    it('generic handler (for all mouse events)', () => {
      const res = mouse.handlers(e => true);
      expect(res.isActive).to.eql(true);
      expect(res.events$).to.be.an.instanceof(Observable);
      expect(res.events.onClick).to.be.an.instanceof(Function);
      expect(res.events.onDoubleClick).to.be.an.instanceof(Function);
      expect(res.events.onMouseDown).to.be.an.instanceof(Function);
      expect(res.events.onMouseUp).to.be.an.instanceof(Function);
      expect(res.events.onMouseEnter).to.be.an.instanceof(Function);
      expect(res.events.onMouseLeave).to.be.an.instanceof(Function);
    });

    it('no handlers', () => {
      const res = mouse.handlers();
      expect(res.isActive).to.eql(false);
      expect(res.events$).to.be.an.instanceof(Observable);
      expect(res.events.onClick).to.eql(undefined);
      expect(res.events.onDoubleClick).to.eql(undefined);
      expect(res.events.onMouseDown).to.eql(undefined);
      expect(res.events.onMouseUp).to.eql(undefined);
      expect(res.events.onMouseEnter).to.eql(undefined);
      expect(res.events.onMouseLeave).to.eql(undefined);
    });

    it('no generic handler, one specific handler (all handlers returned)', () => {
      const res = mouse.handlers(undefined, {
        onMouseEnter: e => true,
        onMouseLeave: e => true,
      });
      expect(res.isActive).to.eql(true);
      expect(res.events$).to.be.an.instanceof(Observable);
      expect(res.events.onClick).to.eql(undefined);
      expect(res.events.onDoubleClick).to.eql(undefined);
      expect(res.events.onMouseDown).to.eql(undefined);
      expect(res.events.onMouseUp).to.eql(undefined);
      expect(res.events.onMouseEnter).to.be.an.instanceof(Function);
      expect(res.events.onMouseLeave).to.be.an.instanceof(Function);
    });
  });
});