/** * @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 {BindingType} from '../../src/expression_parser/ast'; import * as t from '../../src/render3/r3_ast'; import {unparse} from '../expression_parser/utils/unparser'; import {parseR3 as parse} from './view/util'; // Transform an IVY AST to a flat list of nodes to ease testing class R3AstHumanizer implements t.Visitor { result: any[] = []; visitElement(element: t.Element) { this.result.push(['Element', element.name]); this.visitAll([ element.attributes, element.inputs, element.outputs, element.references, element.children, ]); } visitTemplate(template: t.Template) { this.result.push(['Template']); this.visitAll([ template.attributes, template.inputs, template.outputs, template.templateAttrs, template.references, template.variables, template.children, ]); } visitContent(content: t.Content) { this.result.push(['Content', content.selector]); t.visitAll(this, content.attributes); } visitVariable(variable: t.Variable) { this.result.push(['Variable', variable.name, variable.value]); } visitReference(reference: t.Reference) { this.result.push(['Reference', reference.name, reference.value]); } visitTextAttribute(attribute: t.TextAttribute) { this.result.push(['TextAttribute', attribute.name, attribute.value]); } visitBoundAttribute(attribute: t.BoundAttribute) { this.result.push([ 'BoundAttribute', attribute.type, attribute.name, unparse(attribute.value), ]); } visitBoundEvent(event: t.BoundEvent) { this.result.push([ 'BoundEvent', event.name, event.target, unparse(event.handler), ]); } visitText(text: t.Text) { this.result.push(['Text', text.value]); } visitBoundText(text: t.BoundText) { this.result.push(['BoundText', unparse(text.value)]); } visitIcu(icu: t.Icu) { return null; } private visitAll(nodes: t.Node[][]) { nodes.forEach(node => t.visitAll(this, node)); } } function expectFromHtml(html: string) { const res = parse(html); return expectFromR3Nodes(res.nodes); } function expectFromR3Nodes(nodes: t.Node[]) { const humanizer = new R3AstHumanizer(); t.visitAll(humanizer, nodes); return expect(humanizer.result); } function expectSpanFromHtml(html: string) { const {nodes} = parse(html); return expect(nodes[0]!.sourceSpan.toString()); } describe('R3 template transform', () => { describe('ParseSpan on nodes toString', () => { it('should create valid text span on Element with adjacent start and end tags', () => { expectSpanFromHtml('
').toBe('
'); }); }); describe('Nodes without binding', () => { it('should parse text nodes', () => { expectFromHtml('a').toEqual([ ['Text', 'a'], ]); }); it('should parse elements with attributes', () => { expectFromHtml('
').toEqual([ ['Element', 'div'], ['TextAttribute', 'a', 'b'], ]); }); it('should parse ngContent', () => { const res = parse(''); expectFromR3Nodes(res.nodes).toEqual([ ['Content', 'a'], ['TextAttribute', 'select', 'a'], ]); }); it('should parse ngContent when it contains WS only', () => { expectFromHtml(' \n ').toEqual([ ['Content', 'a'], ['TextAttribute', 'select', 'a'], ]); }); it('should parse ngContent regardless the namespace', () => { expectFromHtml('').toEqual([ ['Element', ':svg:svg'], ['Content', 'a'], ['TextAttribute', 'select', 'a'], ]); }); }); describe('Bound text nodes', () => { it('should parse bound text nodes', () => { expectFromHtml('{{a}}').toEqual([ ['BoundText', '{{ a }}'], ]); }); }); describe('Bound attributes', () => { it('should parse mixed case bound properties', () => { expectFromHtml('
').toEqual([ ['Element', 'div'], ['BoundAttribute', BindingType.Property, 'someProp', 'v'], ]); }); it('should parse bound properties via bind- ', () => { expectFromHtml('
').toEqual([ ['Element', 'div'], ['BoundAttribute', BindingType.Property, 'prop', 'v'], ]); }); it('should report missing property names in bind- syntax', () => { expect(() => parse('
')).toThrowError(/Property name is missing in binding/); }); it('should parse bound properties via {{...}}', () => { expectFromHtml('
').toEqual([ ['Element', 'div'], ['BoundAttribute', BindingType.Property, 'prop', '{{ v }}'], ]); }); it('should parse dash case bound properties', () => { expectFromHtml('
').toEqual([ ['Element', 'div'], ['BoundAttribute', BindingType.Property, 'some-prop', 'v'], ]); }); it('should parse dotted name bound properties', () => { expectFromHtml('
').toEqual([ ['Element', 'div'], ['BoundAttribute', BindingType.Property, 'd.ot', 'v'], ]); }); it('should not normalize property names via the element schema', () => { expectFromHtml('
').toEqual([ ['Element', 'div'], ['BoundAttribute', BindingType.Property, 'mappedAttr', 'v'], ]); }); it('should parse mixed case bound attributes', () => { expectFromHtml('
').toEqual([ ['Element', 'div'], ['BoundAttribute', BindingType.Attribute, 'someAttr', 'v'], ]); }); it('should parse and dash case bound classes', () => { expectFromHtml('
').toEqual([ ['Element', 'div'], ['BoundAttribute', BindingType.Class, 'some-class', 'v'], ]); }); it('should parse mixed case bound classes', () => { expectFromHtml('
').toEqual([ ['Element', 'div'], ['BoundAttribute', BindingType.Class, 'someClass', 'v'], ]); }); it('should parse mixed case bound styles', () => { expectFromHtml('
').toEqual([ ['Element', 'div'], ['BoundAttribute', BindingType.Style, 'someStyle', 'v'], ]); }); }); describe('templates', () => { it('should support * directives', () => { expectFromHtml('
').toEqual([ ['Template'], ['TextAttribute', 'ngIf', ''], ['Element', 'div'], ]); }); it('should support ', () => { expectFromHtml('').toEqual([ ['Template'], ]); }); it('should support regardless the namespace', () => { expectFromHtml('').toEqual([ ['Element', ':svg:svg'], ['Template'], ]); }); it('should support reference via #...', () => { expectFromHtml('').toEqual([ ['Template'], ['Reference', 'a', ''], ]); }); it('should support reference via ref-...', () => { expectFromHtml('').toEqual([ ['Template'], ['Reference', 'a', ''], ]); }); it('should parse variables via let-...', () => { expectFromHtml('').toEqual([ ['Template'], ['Variable', 'a', 'b'], ]); }); it('should parse attributes', () => { expectFromHtml('').toEqual([ ['Template'], ['TextAttribute', 'k1', 'v1'], ['TextAttribute', 'k2', 'v2'], ]); }); it('should parse bound attributes', () => { expectFromHtml('').toEqual([ ['Template'], ['BoundAttribute', BindingType.Property, 'k1', 'v1'], ['BoundAttribute', BindingType.Property, 'k2', 'v2'], ]); }); }); describe('inline templates', () => { it('should support attribute and bound attributes', () => { // Desugared form is // //
//
expectFromHtml('
').toEqual([ ['Template'], ['TextAttribute', 'ngFor', ''], ['BoundAttribute', BindingType.Property, 'ngForOf', 'items'], ['Variable', 'item', '$implicit'], ['Element', 'div'], ]); // Note that this test exercises an *incorrect* usage of the ngFor // directive. There is a missing 'let' in the beginning of the expression // which causes the template to be desugared into // //
//
expectFromHtml('
').toEqual([ ['Template'], ['BoundAttribute', BindingType.Property, 'ngFor', 'item'], ['BoundAttribute', BindingType.Property, 'ngForOf', 'items'], ['Element', 'div'], ]); }); it('should parse variables via let ...', () => { expectFromHtml('
').toEqual([ ['Template'], ['TextAttribute', 'ngIf', ''], ['Variable', 'a', 'b'], ['Element', 'div'], ]); }); it('should parse variables via as ...', () => { expectFromHtml('
').toEqual([ ['Template'], ['BoundAttribute', BindingType.Property, 'ngIf', 'expr'], ['Variable', 'local', 'ngIf'], ['Element', 'div'], ]); }); }); describe('events', () => { it('should parse bound events with a target', () => { expectFromHtml('
').toEqual([ ['Element', 'div'], ['BoundEvent', 'event', 'window', 'v'], ]); }); it('should parse event names case sensitive', () => { expectFromHtml('
').toEqual([ ['Element', 'div'], ['BoundEvent', 'some-event', null, 'v'], ]); expectFromHtml('
').toEqual([ ['Element', 'div'], ['BoundEvent', 'someEvent', null, 'v'], ]); }); it('should parse bound events via on-', () => { expectFromHtml('
').toEqual([ ['Element', 'div'], ['BoundEvent', 'event', null, 'v'], ]); }); it('should report missing event names in on- syntax', () => { expect(() => parse('
')).toThrowError(/Event name is missing in binding/); }); it('should parse bound events and properties via [(...)]', () => { expectFromHtml('
').toEqual([ ['Element', 'div'], ['BoundAttribute', BindingType.Property, 'prop', 'v'], ['BoundEvent', 'propChange', null, 'v = $event'], ]); }); it('should parse bound events and properties via bindon-', () => { expectFromHtml('
').toEqual([ ['Element', 'div'], ['BoundAttribute', BindingType.Property, 'prop', 'v'], ['BoundEvent', 'propChange', null, 'v = $event'], ]); }); it('should report missing property names in bindon- syntax', () => { expect(() => parse('
')) .toThrowError(/Property name is missing in binding/); }); it('should report an error on empty expression', () => { expect(() => parse('
')).toThrowError(/Empty expressions are not allowed/); expect(() => parse('
')).toThrowError(/Empty expressions are not allowed/); }); }); describe('variables', () => { it('should report variables not on template elements', () => { expect(() => parse('
')) .toThrowError(/"let-" is only supported on ng-template elements./); }); it('should report missing variable names', () => { expect(() => parse('')) .toThrowError(/Variable does not have a name/); }); }); describe('references', () => { it('should parse references via #...', () => { expectFromHtml('
').toEqual([ ['Element', 'div'], ['Reference', 'a', ''], ]); }); it('should parse references via ref-', () => { expectFromHtml('
').toEqual([ ['Element', 'div'], ['Reference', 'a', ''], ]); }); it('should parse camel case references', () => { expectFromHtml('
').toEqual([ ['Element', 'div'], ['Reference', 'someA', ''], ]); }); it('should report invalid reference names', () => { expect(() => parse('
')).toThrowError(/"-" is not allowed in reference names/); }); it('should report missing reference names', () => { expect(() => parse('
')).toThrowError(/Reference does not have a name/); }); }); describe('literal attribute', () => { it('should report missing animation trigger in @ syntax', () => { expect(() => parse('
')).toThrowError(/Animation trigger is missing/); }); }); describe('ng-content', () => { it('should parse ngContent without selector', () => { const res = parse(''); expectFromR3Nodes(res.nodes).toEqual([ ['Content', '*'], ]); }); it('should parse ngContent with a specific selector', () => { const res = parse(''); const selectors = ['', 'tag[attribute]']; expectFromR3Nodes(res.nodes).toEqual([ ['Content', selectors[1]], ['TextAttribute', 'select', selectors[1]], ]); }); it('should parse ngContent with a selector', () => { const res = parse( ''); const selectors = ['*', 'a', 'b']; expectFromR3Nodes(res.nodes).toEqual([ ['Content', selectors[1]], ['TextAttribute', 'select', selectors[1]], ['Content', selectors[0]], ['Content', selectors[2]], ['TextAttribute', 'select', selectors[2]], ]); }); it('should parse ngProjectAs as an attribute', () => { const res = parse(''); expectFromR3Nodes(res.nodes).toEqual([ ['Content', '*'], ['TextAttribute', 'ngProjectAs', 'a'], ]); }); }); describe('Ignored elements', () => { it('should ignore a').toEqual([ ['Text', 'a'], ]); }); it('should ignore a').toEqual([ ['Text', 'a'], ]); }); }); describe('', () => { it('should keep elements if they have an absolute url', () => { expectFromHtml('').toEqual([ ['Element', 'link'], ['TextAttribute', 'rel', 'stylesheet'], ['TextAttribute', 'href', 'http://someurl'], ]); expectFromHtml('').toEqual([ ['Element', 'link'], ['TextAttribute', 'REL', 'stylesheet'], ['TextAttribute', 'href', 'http://someurl'], ]); }); it('should keep elements if they have no uri', () => { expectFromHtml('').toEqual([ ['Element', 'link'], ['TextAttribute', 'rel', 'stylesheet'], ]); expectFromHtml('').toEqual([ ['Element', 'link'], ['TextAttribute', 'REL', 'stylesheet'], ]); }); it('should ignore elements if they have a relative uri', () => { expectFromHtml('').toEqual([]); expectFromHtml('').toEqual([]); }); }); describe('ngNonBindable', () => { it('should ignore bindings on children of elements with ngNonBindable', () => { expectFromHtml('
{{b}}
').toEqual([ ['Element', 'div'], ['TextAttribute', 'ngNonBindable', ''], ['Text', '{{b}}'], ]); }); it('should keep nested children of elements with ngNonBindable', () => { expectFromHtml('
{{b}}
').toEqual([ ['Element', 'div'], ['TextAttribute', 'ngNonBindable', ''], ['Element', 'span'], ['Text', '{{b}}'], ]); }); it('should ignore a
').toEqual([ ['Element', 'div'], ['TextAttribute', 'ngNonBindable', ''], ['Text', 'a'], ]); }); it('should ignore a
').toEqual([ ['Element', 'div'], ['TextAttribute', 'ngNonBindable', ''], ['Text', 'a'], ]); }); it('should ignore elements inside of elements with ngNonBindable', () => { expectFromHtml('
a
').toEqual([ ['Element', 'div'], ['TextAttribute', 'ngNonBindable', ''], ['Text', 'a'], ]); }); }); });