eda09e69ea
Previously we defensively wrapped expressions in case they ran afoul of precedence rules. For example, it would be easy to create the TS AST structure Call(Ternary(a, b, c)), but might result in printed code of: ``` a ? b : c() ``` Whereas the actual structure we meant to generate is: ``` (a ? b : c)() ``` However the TypeScript renderer appears to be clever enough to provide parenthesis as necessary. This commit removes these defensive paraenthesis in the cases of binary and ternary operations. FW-1273 PR Close #30349
546 lines
21 KiB
TypeScript
546 lines
21 KiB
TypeScript
/**
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* @license
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* Copyright Google Inc. All Rights Reserved.
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*
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* Use of this source code is governed by an MIT-style license that can be
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* found in the LICENSE file at https://angular.io/license
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*/
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import {inspect} from 'util';
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import {tsSourceMapBug29300Fixed} from '../../src/ngtsc/util/src/ts_source_map_bug_29300';
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import {NgtscTestEnvironment} from './env';
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import {SegmentMapping, getMappedSegments} from './sourcemap_utils';
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describe('template source-mapping', () => {
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let env !: NgtscTestEnvironment;
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beforeEach(() => { env = NgtscTestEnvironment.setup(); });
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describe('Inline templates', () => {
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describe('(element creation)', () => {
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it('should map simple element with content', () => {
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const mappings = compileAndMap('<h1>Heading 1</h1>');
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expect(mappings).toContain(
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{source: '<h1>', generated: 'i0.ΔelementStart(0, "h1")', sourceUrl: '../test.ts'});
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expect(mappings).toContain(
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{source: 'Heading 1', generated: 'i0.Δtext(1, "Heading 1")', sourceUrl: '../test.ts'});
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expect(mappings).toContain(
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{source: '</h1>', generated: 'i0.ΔelementEnd()', sourceUrl: '../test.ts'});
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});
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it('should map void element', () => {
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const mappings = compileAndMap('<hr>');
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expect(mappings).toContain(
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{source: '<hr>', generated: 'i0.Δelement(0, "hr")', sourceUrl: '../test.ts'});
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});
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});
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describe('(interpolations)', () => {
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it('should map a mix of interpolated and static content', () => {
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const mappings = compileAndMap('<h3>Hello {{ name }}</h3>');
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expect(mappings).toContain(
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{source: '<h3>', generated: 'i0.ΔelementStart(0, "h3")', sourceUrl: '../test.ts'});
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expect(mappings).toContain({
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source: 'Hello {{ name }}',
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generated: 'i0.ΔtextBinding(1, i0.Δinterpolation1("Hello ", ctx.name, ""))',
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sourceUrl: '../test.ts'
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});
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expect(mappings).toContain(
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{source: '</h3>', generated: 'i0.ΔelementEnd()', sourceUrl: '../test.ts'});
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});
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it('should map a complex interpolated expression', () => {
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const mappings = compileAndMap('<h2>{{ greeting + " " + name }}</h2>');
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expect(mappings).toContain(
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{source: '<h2>', generated: 'i0.ΔelementStart(0, "h2")', sourceUrl: '../test.ts'});
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expect(mappings).toContain({
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source: '{{ greeting + " " + name }}',
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generated:
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'i0.ΔtextBinding(1, i0.Δinterpolation1("", ctx.greeting + " " + ctx.name, ""))',
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sourceUrl: '../test.ts'
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});
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expect(mappings).toContain(
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{source: '</h2>', generated: 'i0.ΔelementEnd()', sourceUrl: '../test.ts'});
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});
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it('should map interpolated properties', () => {
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const mappings = compileAndMap('<div id="{{name}}"></div>');
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expect(mappings).toContain({
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source: '<div id="{{name}}"></div>',
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generated: 'i0.Δelement(0, "div", _c0)',
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sourceUrl: '../test.ts'
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});
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expect(mappings).toContain({
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source: 'id="{{name}}"',
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generated: 'i0.ΔpropertyInterpolate("id", ctx.name)',
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sourceUrl: '../test.ts'
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});
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});
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it('should map interpolation with pipe', () => {
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const mappings = compileAndMap('<div>{{200.3 | percent : 2 }}</div>');
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expect(mappings).toContain(
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{source: '<div>', generated: 'i0.ΔelementStart(0, "div")', sourceUrl: '../test.ts'});
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expect(mappings).toContain({
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source: '{{200.3 | percent : 2 }}',
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generated:
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'i0.ΔtextBinding(1, i0.Δinterpolation1("", i0.ΔpipeBind2(2, 1, 200.3, 2), ""))',
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sourceUrl: '../test.ts'
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});
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expect(mappings).toContain(
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{source: '</div>', generated: 'i0.ΔelementEnd()', sourceUrl: '../test.ts'});
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});
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});
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describe('(property bindings)', () => {
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it('should map a simple input binding expression', () => {
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const mappings = compileAndMap('<div [attr]="name"></div>');
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expect(mappings).toContain({
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source: '<div [attr]="name"></div>',
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generated: 'i0.Δelement(0, "div", _c0)',
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sourceUrl: '../test.ts'
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});
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expect(mappings).toContain({
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source: '[attr]="name"',
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generated: 'i0.Δproperty("attr", ctx.name)',
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sourceUrl: '../test.ts'
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});
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});
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it('should map a complex input binding expression', () => {
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const mappings = compileAndMap('<div [attr]="greeting + name"></div>');
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expect(mappings).toContain({
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source: '<div [attr]="greeting + name"></div>',
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generated: 'i0.Δelement(0, "div", _c0)',
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sourceUrl: '../test.ts'
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});
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expect(mappings).toContain({
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source: '[attr]="greeting + name"',
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generated: 'i0.Δproperty("attr", ctx.greeting + ctx.name)',
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sourceUrl: '../test.ts'
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});
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});
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it('should map a longhand input binding expression', () => {
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const mappings = compileAndMap('<div bind-attr="name"></div>');
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expect(mappings).toContain({
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source: '<div bind-attr="name"></div>',
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generated: 'i0.Δelement(0, "div", _c0)',
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sourceUrl: '../test.ts'
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});
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expect(mappings).toContain({
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source: 'bind-attr="name"',
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generated: 'i0.Δproperty("attr", ctx.name)',
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sourceUrl: '../test.ts'
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});
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});
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it('should map a simple output binding expression', () => {
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const mappings = compileAndMap('<button (click)="doSomething()">Do it</button>');
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expect(mappings).toContain({
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source: '<button (click)="doSomething()">',
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generated: 'i0.ΔelementStart(0, "button", _c0)',
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sourceUrl: '../test.ts'
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});
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expect(mappings).toContain(
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{source: 'Do it', generated: 'i0.Δtext(1, "Do it")', sourceUrl: '../test.ts'});
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expect(mappings).toContain(
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{source: 'doSomething()', generated: 'ctx.doSomething()', sourceUrl: '../test.ts'});
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expect(mappings).toContain(
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{source: '</button>', generated: 'i0.ΔelementEnd()', sourceUrl: '../test.ts'});
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});
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it('should map a complex output binding expression', () => {
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const mappings =
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compileAndMap(`<button (click)="items.push('item' + items.length)">Add Item</button>`);
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expect(mappings).toContain({
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source: `<button (click)="items.push('item' + items.length)">`,
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generated: 'i0.ΔelementStart(0, "button", _c0)',
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sourceUrl: '../test.ts'
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});
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expect(mappings).toContain(
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{source: 'Add Item', generated: 'i0.Δtext(1, "Add Item")', sourceUrl: '../test.ts'});
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expect(mappings).toContain(
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{source: 'items.push(', generated: 'ctx.items.push(', sourceUrl: '../test.ts'});
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expect(mappings).toContain(
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{source: `'item' `, generated: `"item"`, sourceUrl: '../test.ts'});
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expect(mappings).toContain({
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source: '+ items.length)',
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generated: ' + ctx.items.length)',
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sourceUrl: '../test.ts'
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});
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expect(mappings).toContain(
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{source: '</button>', generated: 'i0.ΔelementEnd()', sourceUrl: '../test.ts'});
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});
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it('should map a longhand output binding expression', () => {
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const mappings = compileAndMap('<button on-click="doSomething()">Do it</button>');
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expect(mappings).toContain({
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source: '<button on-click="doSomething()">',
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generated: 'i0.ΔelementStart(0, "button", _c0)',
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sourceUrl: '../test.ts'
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});
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expect(mappings).toContain(
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{source: 'Do it', generated: 'i0.Δtext(1, "Do it")', sourceUrl: '../test.ts'});
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expect(mappings).toContain(
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{source: 'doSomething()', generated: 'ctx.doSomething()', sourceUrl: '../test.ts'});
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expect(mappings).toContain(
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{source: '</button>', generated: 'i0.ΔelementEnd()', sourceUrl: '../test.ts'});
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});
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it('should map a two-way binding expression', () => {
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const mappings = compileAndMap('Name: <input [(ngModel)]="name">');
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expect(mappings).toContain({
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source: '<input [(ngModel)]="name">',
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generated: 'i0.ΔelementStart(1, "input", _c0)',
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sourceUrl: '../test.ts'
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});
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// TODO: improve mappings here
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expect(mappings).toContain({
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source: '[(ngModel)]="name"',
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generated:
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'i0.Δlistener("ngModelChange", function TestCmp_Template_input_ngModelChange_1_listener($event) { return ctx.name = $event; })',
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sourceUrl: '../test.ts'
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});
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expect(mappings).toContain({
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source: '<input [(ngModel)]="name">',
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generated: 'i0.ΔelementEnd()',
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sourceUrl: '../test.ts'
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});
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});
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it('should map a longhand two-way binding expression', () => {
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const mappings = compileAndMap('Name: <input bindon-ngModel="name">');
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expect(mappings).toContain({
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source: '<input bindon-ngModel="name">',
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generated: 'i0.ΔelementStart(1, "input", _c0)',
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sourceUrl: '../test.ts'
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});
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// TODO: improve mappings here
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expect(mappings).toContain({
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source: 'bindon-ngModel="name"',
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generated:
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'i0.Δlistener("ngModelChange", function TestCmp_Template_input_ngModelChange_1_listener($event) { return ctx.name = $event; })',
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sourceUrl: '../test.ts'
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});
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expect(mappings).toContain({
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source: '<input bindon-ngModel="name">',
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generated: 'i0.ΔelementEnd()',
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sourceUrl: '../test.ts'
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});
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});
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it('should map a class input binding', () => {
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const mappings = compileAndMap('<div [class.initial]="isInitial">Message</div>');
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expect(mappings).toContain({
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source: '<div [class.initial]="isInitial">',
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generated: 'i0.ΔelementStart(0, "div")',
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sourceUrl: '../test.ts'
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});
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// TODO: Add better mappings for binding
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expect(mappings).toContain(
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{source: 'Message', generated: 'i0.Δtext(1, "Message")', sourceUrl: '../test.ts'});
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expect(mappings).toContain(
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{source: '</div>', generated: 'i0.ΔelementEnd()', sourceUrl: '../test.ts'});
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});
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});
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describe('(structural directives)', () => {
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it('should map *ngIf scenario', () => {
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const mappings = compileAndMap('<div *ngIf="showMessage()">{{ name }}</div>');
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expect(mappings).toContain({
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source: '<div *ngIf="showMessage()">',
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generated: 'i0.ΔelementStart(0, "div")',
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sourceUrl: '../test.ts'
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});
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// TODO - map the bindings better
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expect(mappings).toContain(
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{source: '</div>', generated: 'i0.ΔelementEnd()', sourceUrl: '../test.ts'});
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// TODO: the `ctx_r...` appears to be dependent upon previous tests!!!
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// expect(mappings).toContain({
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// source: '{{ name }}',
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// generated: 'i0.ΔtextBinding(1, i0.Δinterpolation1("", ctx_r0.name, ""))',
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// sourceUrl: '../test.ts'
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// });
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});
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it('should map ng-template [ngIf] scenario', () => {
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const mappings = compileAndMap(
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`<ng-template [ngIf]="showMessage()">\n` +
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` <div>{{ name }}</div>\n` +
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` <hr>\n` +
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`</ng-template>`);
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expect(mappings).toContain(
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{source: '<div>', generated: 'i0.ΔelementStart(0, "div")', sourceUrl: '../test.ts'});
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// TODO - map the bindings better
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expect(mappings).toContain(
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{source: '</div>', generated: 'i0.ΔelementEnd()', sourceUrl: '../test.ts'});
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// TODO: the `ctx_r...` appears to be dependent upon previous tests!!!
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// expect(mappings).toContain({
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// source: '{{ name }}',
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// generated: 'i0.ΔtextBinding(1, i0.Δinterpolation1("", ctx_r0.name, ""))',
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// sourceUrl: '../test.ts'
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// });
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});
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it('should map *ngFor scenario', () => {
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const mappings = compileAndMap(
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'<div *ngFor="let item of items; index as i; trackBy: trackByFn">{{ item }}</div>');
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expect(mappings).toContain({
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source: '<div *ngFor="let item of items; index as i; trackBy: trackByFn">',
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generated: 'i0.ΔelementStart(0, "div")',
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sourceUrl: '../test.ts'
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});
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// TODO - map the bindings better
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expect(mappings).toContain(
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{source: '</div>', generated: 'i0.ΔelementEnd()', sourceUrl: '../test.ts'});
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});
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it('should map ng-template [ngFor] scenario', () => {
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const mappings =
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compileAndMap(`<ng-template ngFor [ngForOf]="items" let-item>{{ item }}</ng-template>`);
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// TODO - map the bindings better
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});
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});
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describe('(content projection)', () => {
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it('should map default and selected projection', () => {
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const mappings = compileAndMap(
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`<h3><ng-content select="title"></ng-content></h3>\n` +
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`<div><ng-content></ng-content></div>`);
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expect(mappings).toContain(
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{source: '<h3>', generated: 'i0.ΔelementStart(0, "h3")', sourceUrl: '../test.ts'});
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expect(mappings).toContain({
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source: '<ng-content select="title">',
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generated: 'i0.Δprojection(1, 1)',
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sourceUrl: '../test.ts'
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});
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expect(mappings).toContain(
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{source: '</h3>', generated: 'i0.ΔelementEnd()', sourceUrl: '../test.ts'});
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expect(mappings).toContain(
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{source: '<div>', generated: 'i0.ΔelementStart(2, "div")', sourceUrl: '../test.ts'});
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expect(mappings).toContain(
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{source: '<ng-content>', generated: 'i0.Δprojection(3)', sourceUrl: '../test.ts'});
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expect(mappings).toContain(
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{source: '</div>', generated: 'i0.ΔelementEnd()', sourceUrl: '../test.ts'});
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});
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});
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it('should create (simple string) inline template source-mapping', () => {
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const mappings = compileAndMap('<div>this is a test</div><div>{{ 1 + 2 }}</div>');
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// Creation mode
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expect(mappings).toContain(
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{generated: 'i0.ΔelementStart(0, "div")', source: '<div>', sourceUrl: '../test.ts'});
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expect(mappings).toContain({
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generated: 'i0.Δtext(1, "this is a test")',
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source: 'this is a test',
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sourceUrl: '../test.ts'
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});
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expect(mappings).toContain(
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{generated: 'i0.ΔelementEnd()', source: '</div>', sourceUrl: '../test.ts'});
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expect(mappings).toContain(
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{generated: 'i0.ΔelementStart(2, "div")', source: '<div>', sourceUrl: '../test.ts'});
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expect(mappings).toContain(
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{generated: 'i0.Δtext(3)', source: '{{ 1 + 2 }}', sourceUrl: '../test.ts'});
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expect(mappings).toContain(
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{generated: 'i0.ΔelementEnd()', source: '</div>', sourceUrl: '../test.ts'});
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// Update mode
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expect(mappings).toContain({
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generated: 'i0.ΔtextBinding(3, i0.Δinterpolation1("", 1 + 2, ""))',
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source: '{{ 1 + 2 }}',
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sourceUrl: '../test.ts'
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});
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});
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it('should create (simple backtick string) inline template source-mapping', () => {
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const mappings = compileAndMap('<div>this is a test</div><div>{{ 1 + 2 }}</div>');
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// Creation mode
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expect(mappings).toContain(
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{generated: 'i0.ΔelementStart(0, "div")', source: '<div>', sourceUrl: '../test.ts'});
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expect(mappings).toContain({
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generated: 'i0.Δtext(1, "this is a test")',
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source: 'this is a test',
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sourceUrl: '../test.ts'
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});
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expect(mappings).toContain(
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{generated: 'i0.ΔelementEnd()', source: '</div>', sourceUrl: '../test.ts'});
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expect(mappings).toContain(
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{generated: 'i0.ΔelementStart(2, "div")', source: '<div>', sourceUrl: '../test.ts'});
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expect(mappings).toContain(
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{generated: 'i0.Δtext(3)', source: '{{ 1 + 2 }}', sourceUrl: '../test.ts'});
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expect(mappings).toContain(
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{generated: 'i0.ΔelementEnd()', source: '</div>', sourceUrl: '../test.ts'});
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// Update mode
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expect(mappings).toContain({
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generated: 'i0.ΔtextBinding(3, i0.Δinterpolation1("", 1 + 2, ""))',
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source: '{{ 1 + 2 }}',
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sourceUrl: '../test.ts'
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});
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});
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it('should create correct inline template source-mapping when the source contains escape sequences',
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() => {
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// Note that the escaped double quotes, which need un-escaping to be parsed correctly.
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const mappings = compileAndMap('<div class=\\"some-class\\">this is a test</div>');
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expect(mappings).toContain({
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generated: 'i0.ΔelementStart(0, "div", _c0)',
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source: '<div class=\\"some-class\\">',
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sourceUrl: '../test.ts'
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});
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const c2Mapping =
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mappings.find(mapping => /var _c0 = \[1, "some-class"\];/.test(mapping.generated));
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expect(c2Mapping).toBeDefined();
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});
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});
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if (tsSourceMapBug29300Fixed()) {
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describe('External templates (where TS supports source-mapping)', () => {
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it('should create external template source-mapping', () => {
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const mappings =
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compileAndMap('<div>this is a test</div><div>{{ 1 + 2 }}</div>', './dir/test.html');
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// Creation mode
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expect(mappings).toContain({
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generated: 'i0.ΔelementStart(0, "div")',
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source: '<div>',
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sourceUrl: '../dir/test.html'
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});
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expect(mappings).toContain({
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generated: 'i0.Δtext(1, "this is a test")',
|
|
source: 'this is a test',
|
|
sourceUrl: '../dir/test.html'
|
|
});
|
|
expect(mappings).toContain(
|
|
{generated: 'i0.ΔelementEnd()', source: '</div>', sourceUrl: '../dir/test.html'});
|
|
expect(mappings).toContain({
|
|
generated: 'i0.ΔelementStart(2, "div")',
|
|
source: '<div>',
|
|
sourceUrl: '../dir/test.html'
|
|
});
|
|
expect(mappings).toContain(
|
|
{generated: 'i0.Δtext(3)', source: '{{ 1 + 2 }}', sourceUrl: '../dir/test.html'});
|
|
expect(mappings).toContain(
|
|
{generated: 'i0.ΔelementEnd()', source: '</div>', sourceUrl: '../dir/test.html'});
|
|
|
|
// Update mode
|
|
expect(mappings).toContain({
|
|
generated: 'i0.ΔtextBinding(3, i0.Δinterpolation1("", 1 + 2, ""))',
|
|
source: '{{ 1 + 2 }}',
|
|
sourceUrl: '../dir/test.html'
|
|
});
|
|
});
|
|
|
|
it('should create correct mappings when templateUrl is in a different rootDir', () => {
|
|
const mappings = compileAndMap(
|
|
'<div>this is a test</div><div>{{ 1 + 2 }}</div>', 'extraRootDir/test.html');
|
|
|
|
// Creation mode
|
|
expect(mappings).toContain({
|
|
generated: 'i0.ΔelementStart(0, "div")',
|
|
source: '<div>',
|
|
sourceUrl: '../extraRootDir/test.html'
|
|
});
|
|
expect(mappings).toContain({
|
|
generated: 'i0.Δtext(1, "this is a test")',
|
|
source: 'this is a test',
|
|
sourceUrl: '../extraRootDir/test.html'
|
|
});
|
|
expect(mappings).toContain({
|
|
generated: 'i0.ΔelementEnd()',
|
|
source: '</div>',
|
|
sourceUrl: '../extraRootDir/test.html'
|
|
});
|
|
expect(mappings).toContain({
|
|
generated: 'i0.ΔelementStart(2, "div")',
|
|
source: '<div>',
|
|
sourceUrl: '../extraRootDir/test.html'
|
|
});
|
|
expect(mappings).toContain({
|
|
generated: 'i0.Δtext(3)',
|
|
source: '{{ 1 + 2 }}',
|
|
sourceUrl: '../extraRootDir/test.html'
|
|
});
|
|
expect(mappings).toContain({
|
|
generated: 'i0.ΔelementEnd()',
|
|
source: '</div>',
|
|
sourceUrl: '../extraRootDir/test.html'
|
|
});
|
|
|
|
// Update mode
|
|
expect(mappings).toContain({
|
|
generated: 'i0.ΔtextBinding(3, i0.Δinterpolation1("", 1 + 2, ""))',
|
|
source: '{{ 1 + 2 }}',
|
|
sourceUrl: '../extraRootDir/test.html'
|
|
});
|
|
});
|
|
});
|
|
}
|
|
|
|
function compileAndMap(template: string, templateUrl: string | null = null) {
|
|
const templateConfig = templateUrl ? `templateUrl: '${templateUrl}'` :
|
|
('template: `' + template.replace(/`/g, '\\`') + '`');
|
|
env.tsconfig({sourceMap: true});
|
|
env.write('test.ts', `
|
|
import {Component} from '@angular/core';
|
|
|
|
@Component({
|
|
selector: 'test-cmp',
|
|
${templateConfig}
|
|
})
|
|
export class TestCmp {}
|
|
`);
|
|
if (templateUrl) {
|
|
env.write(templateUrl, template);
|
|
}
|
|
env.driveMain();
|
|
return getMappedSegments(env, 'test.js');
|
|
}
|
|
|
|
/**
|
|
* Helper function for debugging failed mappings.
|
|
* This lays out the segment mappings in the console to make it easier to compare.
|
|
*/
|
|
function dumpMappings(mappings: SegmentMapping[]) {
|
|
mappings.forEach(map => {
|
|
// tslint:disable-next-line:no-console
|
|
console.log(
|
|
padValue(map.sourceUrl, 20, 0) + ' : ' + padValue(inspect(map.source), 100, 23) + ' : ' +
|
|
inspect(map.generated));
|
|
});
|
|
function padValue(value: string, max: number, start: number) {
|
|
const padding = value.length > max ? ('\n' +
|
|
' '.repeat(max + start)) :
|
|
' '.repeat(max - value.length);
|
|
return value + padding;
|
|
}
|
|
}
|
|
});
|