angular-docs-cn/modules/angular2/test/services/ruler_spec.js

import {
  AsyncTestCompleter, inject, ddescribe, describe, it, iit, xit, expect, SpyObject,
  proxy
} from 'angular2/test_lib';

import {DOM, DomAdapter} from 'angular2/src/dom/dom_adapter';
import {ElementRef} from 'angular2/src/core/compiler/element_ref';

import {Ruler, Rectangle} from 'angular2/src/services/ruler';
import {createRectangle} from './rectangle_mock';
import {IMPLEMENTS} from 'angular2/src/facade/lang';

function assertDimensions(rect: Rectangle, left, right, top, bottom, width, height) {
  expect(rect.left).toEqual(left);
  expect(rect.right).toEqual(right);
  expect(rect.top).toEqual(top);
  expect(rect.bottom).toEqual(bottom);
  expect(rect.width).toEqual(width);
  expect(rect.height).toEqual(height);
}

export function main() {

  describe('ruler service', () => {

    it('should allow measuring ElementRefs',
      inject([AsyncTestCompleter], (async) => {
        var ruler = new Ruler(SpyObject.stub(new SpyDomAdapter(), {
          'getBoundingClientRect': createRectangle(10, 20, 200, 100)
        }));

        var elRef = new SpyElementRef();
        ruler.measure(elRef).then((rect) => {
          assertDimensions(rect, 10, 210, 20, 120, 200, 100);
          async.done();
        });
      }));


    it('should return 0 for all rectangle values while measuring elements in a document fragment',
      inject([AsyncTestCompleter], (async) => {
        var ruler = new Ruler(DOM);
        var elRef = new SpyElementRef();
        elRef.domElement = DOM.createElement('div');
        ruler.measure(elRef).then((rect) => {
          //here we are using an element created in a doc fragment so all the measures will come back as 0
          assertDimensions(rect, 0, 0, 0, 0, 0, 0);
          async.done();
        });
    }));

  });
}

@proxy
@IMPLEMENTS(ElementRef)
class SpyElementRef extends SpyObject {
  domElement;
  constructor(){super(ElementRef);}
  noSuchMethod(m){return super.noSuchMethod(m)}
}

@proxy
@IMPLEMENTS(DomAdapter)
class SpyDomAdapter extends SpyObject {
  constructor(){super(DomAdapter);}
  noSuchMethod(m){return super.noSuchMethod(m)}
}