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

114 lines
4.2 KiB
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 'reflect-metadata';
import * as ts from 'typescript';
import {createLanguageService} from '../src/language_service';
import {Hover} from '../src/types';
import {TypeScriptServiceHost} from '../src/typescript_host';
import {toh} from './test_data';
import {MockTypescriptHost} from './test_utils';
describe('hover', () => {
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);
it('should be able to find field in an interpolation', () => {
hover(
` @Component({template: '{{«name»}}'}) export class MyComponent { name: string; }`,
'property name of MyComponent');
});
it('should be able to find a field in a attribute reference', () => {
hover(
` @Component({template: '<input [(ngModel)]="«name»">'}) export class MyComponent { name: string; }`,
'property name of MyComponent');
});
it('should be able to find a method from a call', () => {
hover(
` @Component({template: '<div (click)="«ᐱmyClickᐱ()»;"></div>'}) export class MyComponent { myClick() { }}`,
'method myClick of MyComponent');
});
it('should be able to find a field reference in an *ngIf', () => {
hover(
` @Component({template: '<div *ngIf="«include»"></div>'}) export class MyComponent { include = true;}`,
'property include of MyComponent');
});
it('should be able to find a reference to a component', () => {
hover(
` @Component({template: '«<ᐱtestᐱ-comp></test-comp>»'}) export class MyComponent { }`,
'component TestComponent');
});
it('should be able to find an event provider', () => {
hover(
` @Component({template: '<test-comp «(ᐱtestᐱ)="myHandler()"»></div>'}) export class MyComponent { myHandler() {} }`,
'event testEvent of TestComponent');
});
it('should be able to find an input provider', () => {
hover(
` @Component({template: '<test-comp «[ᐱtcNameᐱ]="name"»></div>'}) export class MyComponent { name = 'my name'; }`,
'property name of TestComponent');
});
it('should be able to ignore a reference declaration', () => {
addCode(
` @Component({template: '<div #«chart»></div>'}) export class MyComponent { }`,
fileName => {
const markers = mockHost.getReferenceMarkers(fileName) !;
const hover = ngService.getHoverAt(fileName, markers.references.chart[0].start);
expect(hover).toBeUndefined();
});
});
function hover(code: string, hoverText: string) {
addCode(code, fileName => {
let tests = 0;
const markers = mockHost.getReferenceMarkers(fileName) !;
const keys = Object.keys(markers.references).concat(Object.keys(markers.definitions));
for (const referenceName of keys) {
const references = (markers.references[referenceName] ||
[]).concat(markers.definitions[referenceName] || []);
for (const reference of references) {
tests++;
const hover = ngService.getHoverAt(fileName, reference.start);
if (!hover) throw new Error(`Expected a hover at location ${reference.start}`);
expect(hover.span).toEqual(reference);
expect(toText(hover)).toEqual(hoverText);
}
}
expect(tests).toBeGreaterThan(0); // If this fails the test is wrong.
});
}
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);
try {
cb(fileName, newContent);
} finally {
mockHost.override(fileName, undefined !);
}
}
function toText(hover: Hover): string { return hover.text.map(h => h.text).join(''); }
});