angular-docs-cn/modules/@angular/compiler/test/view_compiler/util_spec.ts

66 lines
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TypeScript

/**
* @license
* Copyright Google Inc. All Rights Reserved.
*
* Use of this source code is governed by an MIT-style license that can be
* found in the LICENSE file at https://angular.io/license
*/
import {CompileIdentifierMetadata} from '../../src/compile_metadata';
import * as o from '../../src/output/output_ast';
import {CompileView} from '../../src/view_compiler/compile_view';
import {getPropertyInView} from '../../src/view_compiler/util';
export function main() {
describe('getPropertyInView', () => {
it('should return the expression if it is the same view', () => {
const expr = o.THIS_EXPR.prop('someProp');
const callingView = createCompileView({className: 'view'});
expect(getPropertyInView(expr, callingView, callingView)).toBe(expr);
});
it('should access an unknown property in a parent view', () => {
const expr = o.THIS_EXPR.prop('someProp');
const definedView = createCompileView({className: 'parentView'});
const callingView = createCompileView({className: 'childView', parent: definedView});
expect(getPropertyInView(expr, callingView, definedView))
.toEqual(o.THIS_EXPR.prop('parentView').prop('someProp'));
});
it('should access a known property in a parent view with cast', () => {
const expr = o.THIS_EXPR.prop('someProp');
const definedView = createCompileView({className: 'parentView', fields: ['someProp']});
const callingView = createCompileView({className: 'childView', parent: definedView});
expect(getPropertyInView(expr, callingView, definedView))
.toEqual(o.THIS_EXPR.prop('parentView').cast(definedView.classType).prop('someProp'));
});
it('should access a known property in a parent view with cast also for property chain expressions',
() => {
const expr = o.THIS_EXPR.prop('someProp').prop('context');
const definedView = createCompileView({className: 'parentView', fields: ['someProp']});
const callingView = createCompileView({className: 'childView', parent: definedView});
expect(getPropertyInView(expr, callingView, definedView))
.toEqual(o.THIS_EXPR.prop('parentView')
.cast(definedView.classType)
.prop('someProp')
.prop('context'));
});
});
}
function createCompileView(config: {className: string, parent?: CompileView, fields?: string[]}):
CompileView {
const declarationElement: any = config.parent ? {view: config.parent} : {view: null};
const fields: o.ClassField[] = [];
if (config.fields) {
config.fields.forEach((fieldName) => { fields.push(new o.ClassField(fieldName)); });
}
return <any>{
classType: o.importType({reference: null}),
fields: fields,
getters: [],
declarationElement: declarationElement
};
}