237 lines
8.1 KiB
TypeScript
237 lines
8.1 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 'reflect-metadata';
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import * as ts from 'typescript';
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import {createLanguageService} from '../src/language_service';
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import {Completions} from '../src/types';
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import {TypeScriptServiceHost} from '../src/typescript_host';
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import {toh} from './test_data';
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import {MockTypescriptHost} from './test_utils';
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describe('completions', () => {
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let documentRegistry = ts.createDocumentRegistry();
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let mockHost = new MockTypescriptHost(['/app/main.ts', '/app/parsing-cases.ts'], toh);
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let service = ts.createLanguageService(mockHost, documentRegistry);
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let ngHost = new TypeScriptServiceHost(mockHost, service);
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let ngService = createLanguageService(ngHost);
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ngHost.setSite(ngService);
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it('should be able to get entity completions',
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() => { contains('/app/test.ng', 'entity-amp', '&', '>', '<', 'ι'); });
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it('should be able to return html elements', () => {
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let htmlTags = ['h1', 'h2', 'div', 'span'];
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let locations = ['empty', 'start-tag-h1', 'h1-content', 'start-tag', 'start-tag-after-h'];
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for (let location of locations) {
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contains('/app/test.ng', location, ...htmlTags);
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}
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});
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it('should be able to return element diretives',
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() => { contains('/app/test.ng', 'empty', 'my-app'); });
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it('should be able to return h1 attributes',
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() => { contains('/app/test.ng', 'h1-after-space', 'id', 'dir', 'lang', 'onclick'); });
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it('should be able to find common angular attributes',
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() => { contains('/app/test.ng', 'div-attributes', '(click)', '[ngClass]'); });
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it('should be able to get completions in some random garbage', () => {
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const fileName = '/app/test.ng';
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mockHost.override(fileName, ' > {{tle<\n {{retl ><bel/beled}}di>\n la</b </d &a ');
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expect(() => ngService.getCompletionsAt(fileName, 31)).not.toThrow();
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mockHost.override(fileName, undefined);
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});
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it('should be able to infer the type of a ngForOf', () => {
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addCode(
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`
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interface Person {
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name: string,
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street: string
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}
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@Component({template: '<div *ngFor="let person of people">{{person.~{name}name}}</div'})
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export class MyComponent {
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people: Person[]
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}`,
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() => { contains('/app/app.component.ts', 'name', 'name', 'street'); });
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});
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it('should be able to infer the type of a ngForOf with an async pipe', () => {
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addCode(
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`
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interface Person {
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name: string,
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street: string
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}
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@Component({template: '<div *ngFor="let person of people | async">{{person.~{name}name}}</div'})
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export class MyComponent {
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people: Promise<Person[]>;
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}`,
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() => { contains('/app/app.component.ts', 'name', 'name', 'street'); });
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});
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it('should be able to complete every character in the file', () => {
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const fileName = '/app/test.ng';
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expect(() => {
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let chance = 0.05;
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let requests = 0;
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function tryCompletionsAt(position: number) {
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try {
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if (Math.random() < chance) {
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ngService.getCompletionsAt(fileName, position);
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requests++;
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}
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} catch (e) {
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// Emit enough diagnostic information to reproduce the error.
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console.error(
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`Position: ${position}\nContent: "${mockHost.getFileContent(fileName)}"\nStack:\n${e.stack}`);
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throw e;
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}
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}
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try {
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const originalContent = mockHost.getFileContent(fileName);
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// For each character in the file, add it to the file and request a completion after it.
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for (let index = 0, len = originalContent.length; index < len; index++) {
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const content = originalContent.substr(0, index);
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mockHost.override(fileName, content);
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tryCompletionsAt(index);
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}
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// For the complete file, try to get a completion at every character.
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mockHost.override(fileName, originalContent);
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for (let index = 0, len = originalContent.length; index < len; index++) {
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tryCompletionsAt(index);
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}
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// Delete random characters in the file until we get an empty file.
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let content = originalContent;
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while (content.length > 0) {
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const deleteIndex = Math.floor(Math.random() * content.length);
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content = content.slice(0, deleteIndex - 1) + content.slice(deleteIndex + 1);
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mockHost.override(fileName, content);
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const requestIndex = Math.floor(Math.random() * content.length);
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tryCompletionsAt(requestIndex);
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}
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// Build up the string from zero asking for a completion after every char
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buildUp(originalContent, (text, position) => {
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mockHost.override(fileName, text);
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tryCompletionsAt(position);
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});
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} finally {
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mockHost.override(fileName, undefined);
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}
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}).not.toThrow();
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});
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describe('with regression tests', () => {
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it('should not crash with an incomplete component', () => {
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expect(() => {
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const code = `
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@Component({
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template: '~{inside-template}'
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})
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export class MyComponent {
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}`;
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addCode(code, fileName => { contains(fileName, 'inside-template', 'h1'); });
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}).not.toThrow();
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});
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it('should hot crash with an incomplete class', () => {
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expect(() => {
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addCode('\nexport class', fileName => { ngHost.updateAnalyzedModules(); });
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}).not.toThrow();
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});
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});
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function addCode(code: string, cb: (fileName: string, content?: string) => void) {
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const fileName = '/app/app.component.ts';
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const originalContent = mockHost.getFileContent(fileName);
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const newContent = originalContent + code;
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mockHost.override(fileName, originalContent + code);
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ngHost.updateAnalyzedModules();
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try {
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cb(fileName, newContent);
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} finally {
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mockHost.override(fileName, undefined);
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}
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}
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function contains(fileName: string, locationMarker: string, ...names: string[]) {
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let location = mockHost.getMarkerLocations(fileName)[locationMarker];
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if (location == null) {
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throw new Error(`No marker ${locationMarker} found.`);
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}
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expectEntries(locationMarker, ngService.getCompletionsAt(fileName, location), ...names);
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}
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});
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function expectEntries(locationMarker: string, completions: Completions, ...names: string[]) {
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let entries: {[name: string]: boolean} = {};
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if (!completions) {
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throw new Error(
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`Expected result from ${locationMarker} to include ${names.join(', ')} but no result provided`);
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}
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if (!completions.length) {
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throw new Error(
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`Expected result from ${locationMarker} to include ${names.join(', ')} an empty result provided`);
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} else {
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for (let entry of completions) {
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entries[entry.name] = true;
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}
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let missing = names.filter(name => !entries[name]);
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if (missing.length) {
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throw new Error(
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`Expected result from ${locationMarker} to include at least one of the following, ${missing.join(', ')}, in the list of entries ${completions.map(entry => entry.name).join(', ')}`);
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}
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}
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}
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function buildUp(originalText: string, cb: (text: string, position: number) => void) {
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let count = originalText.length;
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let inString: boolean[] = (new Array(count)).fill(false);
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let unused: number[] = (new Array(count)).fill(1).map((v, i) => i);
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function getText() {
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return new Array(count)
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.fill(1)
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.map((v, i) => i)
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.filter(i => inString[i])
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.map(i => originalText[i])
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.join('');
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}
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function randomUnusedIndex() { return Math.floor(Math.random() * unused.length); }
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while (unused.length > 0) {
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let unusedIndex = randomUnusedIndex();
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let index = unused[unusedIndex];
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if (index == null) throw new Error('Internal test buildup error');
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if (inString[index]) throw new Error('Internal test buildup error');
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inString[index] = true;
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unused.splice(unusedIndex, 1);
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let text = getText();
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let position =
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inString.filter((_, i) => i <= index).map(v => v ? 1 : 0).reduce((p, v) => p + v, 0);
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cb(text, position);
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}
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}
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