angular-cn/packages/language-service/test/completions_spec.ts

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