angular-docs-cn/modules/angular2/test/render/dom/compiler/directive_parser_spec.js

import {describe, beforeEach, it, xit, expect, iit, ddescribe, el} from 'angular2/test_lib';
import {isPresent, isBlank, assertionsEnabled} from 'angular2/src/facade/lang';
import {ListWrapper, MapWrapper, StringMapWrapper} from 'angular2/src/facade/collection';
import {DOM} from 'angular2/src/dom/dom_adapter';
import {DirectiveParser} from 'angular2/src/render/dom/compiler/directive_parser';
import {CompilePipeline} from 'angular2/src/render/dom/compiler/compile_pipeline';
import {CompileStep} from 'angular2/src/render/dom/compiler/compile_step';
import {CompileElement} from 'angular2/src/render/dom/compiler/compile_element';
import {CompileControl} from 'angular2/src/render/dom/compiler/compile_control';
import {ViewDefinition, DirectiveMetadata} from 'angular2/src/render/api';
import {Lexer, Parser} from 'angular2/change_detection';

export function main() {
  describe('DirectiveParser', () => {
    var parser, annotatedDirectives;

    beforeEach( () => {
      annotatedDirectives = [
        someComponent,
        someComponent2,
        someDirective,
        someDirectiveIgnoringChildren,
        decoratorWithMultipleAttrs,
        someDirectiveWithProps,
        someDirectiveWithHostProperties,
        someDirectiveWithHostAttributes,
        someDirectiveWithEvents,
        someDirectiveWithGlobalEvents,
        someDirectiveWithHostActions
      ];
      parser = new Parser(new Lexer());
    });

    function createPipeline(propertyBindings = null, directives = null) {
      if (isBlank(directives)) directives = annotatedDirectives;

      return new CompilePipeline([
        new MockStep( (parent, current, control) => {
          if (isPresent(propertyBindings)) {
            StringMapWrapper.forEach(propertyBindings, (ast, name) => {
              current.bindElement().bindProperty(name, ast);
            });
          }
        }),
        new DirectiveParser(parser, directives)
      ]);
    }

    function process(el, propertyBindings = null, directives = null) {
      var pipeline = createPipeline(propertyBindings, directives);
      return ListWrapper.map(pipeline.process(el), (ce) => ce.inheritedElementBinder );
    }

    it('should not add directives if they are not used', () => {
      var results = process(el('<div></div>'));
      expect(results[0]).toBe(null);
    });

    it('should detect directives in attributes', () => {
      var results = process(el('<div some-decor></div>'));
      expect(results[0].directives[0].directiveIndex).toBe(
        annotatedDirectives.indexOf(someDirective)
      );
    });

    it('should detect directives with multiple attributes', () => {
      var results = process(el('<input type=text control=one></input>'));
      expect(results[0].directives[0].directiveIndex).toBe(
        annotatedDirectives.indexOf(decoratorWithMultipleAttrs)
      );
    });

    it('should compile children by default', () => {
      var results = createPipeline().process(el('<div some-decor></div>'));
      expect(results[0].compileChildren).toEqual(true);
    });

    it('should stop compiling children when specified in the directive config', () => {
      var results = createPipeline().process(el('<div some-decor-ignoring-children></div>'));
      expect(results[0].compileChildren).toEqual(false);
    });

    it('should bind directive properties from bound properties', () => {
      var results = process(
        el('<div some-decor-props></div>'),
        {
          'elProp': parser.parseBinding('someExpr', '')
        }
      );
      var directiveBinding = results[0].directives[0];
      expect(MapWrapper.get(directiveBinding.propertyBindings, 'dirProp').source)
        .toEqual('someExpr');
    });

    it('should bind directive properties with pipes', () => {
      var results = process(
        el('<div some-decor-props></div>'),
        {
          'elProp': parser.parseBinding('someExpr', '')
        }
      );
      var directiveBinding = results[0].directives[0];
      var pipedProp = MapWrapper.get(directiveBinding.propertyBindings, 'doubleProp');
      var simpleProp = MapWrapper.get(directiveBinding.propertyBindings, 'dirProp');
      expect(pipedProp.ast.name).toEqual('double');
      expect(pipedProp.ast.exp).toEqual(simpleProp.ast);
      expect(simpleProp.source).toEqual('someExpr');
    });

    it('should bind directive properties from attribute values', () => {
      var results = process(
        el('<div some-decor-props el-prop="someValue"></div>')
      );
      var directiveBinding = results[0].directives[0];
      var simpleProp = MapWrapper.get(directiveBinding.propertyBindings, 'dirProp');
      expect(simpleProp.source).toEqual('someValue');
    });

    it('should bind host directive properties', () => {
      var element = el('<input some-decor-with-host-props>');
      var results = process(element);

      var directiveBinding = results[0].directives[0];

      var ast = MapWrapper.get(directiveBinding.hostPropertyBindings, 'hostProperty');
      expect(ast.source).toEqual('dirProp');
    });

    it('should set host element attributes', () => {
      var element = el('<input some-decor-with-host-attrs>');
      var results = process(element);

      expect(DOM.getAttribute(results[0].element, 'attr_name')).toEqual('attr_val');
    });

    it('should not set host element attribute if an attribute already exists', () => {
      var element = el('<input attr_name="initial" some-decor-with-host-attrs>');
      var results = process(element);

      expect(DOM.getAttribute(results[0].element, 'attr_name')).toEqual('initial');

      DOM.removeAttribute(element, 'attr_name');
      results = process(element);
      expect(DOM.getAttribute(results[0].element, 'attr_name')).toEqual('attr_val');
    });

    it('should read attribute values', () => {
      var element = el('<input some-decor-props some-attr="someValue">');
      var results = process(element);
      expect(MapWrapper.get(results[0].readAttributes, 'some-attr')).toEqual('someValue');
    });

    it('should bind directive events', () => {
      var results = process(
        el('<div some-decor-events></div>')
      );
      var directiveBinding = results[0].directives[0];
      expect(directiveBinding.eventBindings.length).toEqual(1);
      var eventBinding = directiveBinding.eventBindings[0];
      expect(eventBinding.fullName).toEqual('click');
      expect(eventBinding.source.source).toEqual('doIt()');
    });

    it('should bind directive global events', () => {
      var results = process(
        el('<div some-decor-globalevents></div>')
      );
      var directiveBinding = results[0].directives[0];
      expect(directiveBinding.eventBindings.length).toEqual(1);
      var eventBinding = directiveBinding.eventBindings[0];
      expect(eventBinding.fullName).toEqual('window:resize');
      expect(eventBinding.source.source).toEqual('doItGlobal()');
    });

    it('should bind directive host actions', () => {
      var results = process(
          el('<div some-decor-host-actions></div>')
      );
      var directiveBinding = results[0].directives[0];
      expect(directiveBinding.hostActions[0].actionName).toEqual('focus');
    });

    //TODO: assertions should be enabled when running tests: https://github.com/angular/angular/issues/1340
    describe('component directives', () => {
      it('should save the component id', () => {
        var results = process(
          el('<some-comp></some-comp>')
        );
        expect(results[0].componentId).toEqual('someComponent');
      });

      it('should throw when the provided selector is not an element selector', () => {
        expect( () => {
          createPipeline(null, [componentWithNonElementSelector]);
        }).toThrowError(`Component 'componentWithNonElementSelector' can only have an element selector, but had '[attr]'`);
      });

      it('should not allow multiple component directives on the same element', () => {
         expect( () => {
           process(
             el('<some-comp></some-comp>'),
             null,
             [someComponent, someComponentDup]
           );
         }).toThrowError(new RegExp('Only one component directive is allowed per element' ));
      });

      it('should sort the directives and store the component as the first directive', () => {
        var results = process(
          el('<some-comp some-decor></some-comp>')
        );
        expect(annotatedDirectives[results[0].directives[0].directiveIndex].id).toEqual('someComponent');
        expect(annotatedDirectives[results[0].directives[1].directiveIndex].id).toEqual('someDirective');
      });
    });
  });
}

class MockStep extends CompileStep {
  processClosure:Function;
  constructor(process) {
    super();
    this.processClosure = process;
  }
  process(parent:CompileElement, current:CompileElement, control:CompileControl) {
    this.processClosure(parent, current, control);
  }
}

var someComponent = new DirectiveMetadata({
  selector: 'some-comp',
  id: 'someComponent',
  type: DirectiveMetadata.COMPONENT_TYPE
});

var someComponentDup = new DirectiveMetadata({
  selector: 'some-comp',
  id: 'someComponentDup',
  type: DirectiveMetadata.COMPONENT_TYPE
});

var someComponent2 = new DirectiveMetadata({
  selector: 'some-comp2',
  id: 'someComponent2',
  type: DirectiveMetadata.COMPONENT_TYPE
});

var someDirective = new DirectiveMetadata({
  selector: '[some-decor]',
  id: 'someDirective',
  type: DirectiveMetadata.DIRECTIVE_TYPE
});

var someDirectiveIgnoringChildren = new DirectiveMetadata({
  selector: '[some-decor-ignoring-children]',
  compileChildren: false,
  type: DirectiveMetadata.DIRECTIVE_TYPE

});

var decoratorWithMultipleAttrs = new DirectiveMetadata({
  selector: 'input[type=text][control]',
  id: 'decoratorWithMultipleAttrs',
  type: DirectiveMetadata.DIRECTIVE_TYPE
});

var someDirectiveWithProps = new DirectiveMetadata({
  selector: '[some-decor-props]',
  properties: MapWrapper.createFromStringMap({
    'dirProp': 'elProp',
    'doubleProp': 'elProp | double'
  }),
  readAttributes: ['some-attr']
});

var someDirectiveWithHostProperties = new DirectiveMetadata({
  selector: '[some-decor-with-host-props]',
  hostProperties: MapWrapper.createFromStringMap({
    'dirProp': 'hostProperty'
  })
});

var someDirectiveWithHostAttributes = new DirectiveMetadata({
  selector: '[some-decor-with-host-attrs]',
  hostAttributes: MapWrapper.createFromStringMap({
    'attr_name': 'attr_val'
  })
});

var someDirectiveWithEvents = new DirectiveMetadata({
  selector: '[some-decor-events]',
  hostListeners: MapWrapper.createFromStringMap({
    'click': 'doIt()'
  })
});

var someDirectiveWithHostActions = new DirectiveMetadata({
  selector: '[some-decor-host-actions]',
  hostActions: MapWrapper.createFromStringMap({
    'focus': 'focus()'
  })
});

var someDirectiveWithGlobalEvents = new DirectiveMetadata({
  selector: '[some-decor-globalevents]',
  hostListeners: MapWrapper.createFromStringMap({
    'window:resize': 'doItGlobal()'
  })
});

var componentWithNonElementSelector = new DirectiveMetadata({
  id: 'componentWithNonElementSelector',
  selector: '[attr]',
  type: DirectiveMetadata.COMPONENT_TYPE
});