angular-cn/packages/language-service/test/definitions_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 * as ts from 'typescript';
import {createLanguageService} from '../src/language_service';
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import {Span} from '../src/types';
import {TypeScriptServiceHost} from '../src/typescript_host';
import {toh} from './test_data';
import {MockTypescriptHost,} from './test_utils';
describe('definitions', () => {
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', () => {
localReference(
` @Component({template: '{{«name»}}'}) export class MyComponent { «ᐱnameᐱ: string;» }`);
});
it('should be able to find a field in a attribute reference', () => {
localReference(
` @Component({template: '<input [(ngModel)]="«name»">'}) export class MyComponent { «ᐱnameᐱ: string;» }`);
});
it('should be able to find a method from a call', () => {
localReference(
` @Component({template: '<div (click)="«myClick»();"></div>'}) export class MyComponent { «ᐱmyClickᐱ() { }»}`);
});
it('should be able to find a field reference in an *ngIf', () => {
localReference(
` @Component({template: '<div *ngIf="«include»"></div>'}) export class MyComponent { «ᐱincludeᐱ = true;»}`);
});
it('should be able to find a reference to a component', () => {
reference(
'parsing-cases.ts',
` @Component({template: '<«test-comp»></test-comp>'}) export class MyComponent { }`);
});
it('should be able to find an event provider', () => {
reference(
'/app/parsing-cases.ts', 'test',
` @Component({template: '<test-comp («test»)="myHandler()"></div>'}) export class MyComponent { myHandler() {} }`);
});
it('should be able to find an input provider', () => {
reference(
'/app/parsing-cases.ts', 'tcName',
` @Component({template: '<test-comp [«tcName»]="name"></div>'}) export class MyComponent { name = 'my name'; }`);
});
it('should be able to find a pipe', () => {
reference(
'common.d.ts',
` @Component({template: '<div *ngIf="input | «async»"></div>'}) export class MyComponent { input: EventEmitter; }`);
});
function localReference(code: string) {
addCode(code, fileName => {
const refResult = mockHost.getReferenceMarkers(fileName) !;
for (const name in refResult.references) {
const references = refResult.references[name];
const definitions = refResult.definitions[name];
expect(definitions).toBeDefined(); // If this fails the test data is wrong.
for (const reference of references) {
const definition = ngService.getDefinitionAt(fileName, reference.start);
if (definition) {
definition.forEach(d => expect(d.fileName).toEqual(fileName));
const match = matchingSpan(definition.map(d => d.span), definitions);
if (!match) {
throw new Error(
`Expected one of ${stringifySpans(definition.map(d => d.span))} to match one of ${stringifySpans(definitions)}`);
}
} else {
throw new Error('Expected a definition');
}
}
}
});
}
function reference(referencedFile: string, code: string): void;
function reference(referencedFile: string, span: Span, code: string): void;
function reference(referencedFile: string, definition: string, code: string): void;
function reference(referencedFile: string, p1?: any, p2?: any): void {
const code: string = p2 ? p2 : p1;
const definition: string = p2 ? p1 : undefined;
let span: Span = p2 && p1.start != null ? p1 : undefined;
if (definition && !span) {
const referencedFileMarkers = mockHost.getReferenceMarkers(referencedFile) !;
expect(referencedFileMarkers).toBeDefined(); // If this fails the test data is wrong.
const spans = referencedFileMarkers.definitions[definition];
expect(spans).toBeDefined(); // If this fails the test data is wrong.
span = spans[0];
}
addCode(code, fileName => {
const refResult = mockHost.getReferenceMarkers(fileName) !;
let tests = 0;
for (const name in refResult.references) {
const references = refResult.references[name];
expect(reference).toBeDefined(); // If this fails the test data is wrong.
for (const reference of references) {
tests++;
const definition = ngService.getDefinitionAt(fileName, reference.start);
if (definition) {
definition.forEach(d => {
if (d.fileName.indexOf(referencedFile) < 0) {
throw new Error(
`Expected reference to file ${referencedFile}, received ${d.fileName}`);
}
if (span) {
expect(d.span).toEqual(span);
}
});
} else {
throw new Error('Expected a definition');
}
}
}
if (!tests) {
throw new Error('Expected at least one reference (test data error)');
}
});
}
function addCode(code: string, cb: (fileName: string, content?: string) => void) {
const fileName = '/app/app.component.ts';
const originalContent = mockHost.getFileContent(fileName);
const newContent = originalContent + code;
mockHost.override(fileName, originalContent + code);
try {
cb(fileName, newContent);
} finally {
mockHost.override(fileName, undefined !);
}
}
});
function matchingSpan(aSpans: Span[], bSpans: Span[]): Span|undefined {
for (const a of aSpans) {
for (const b of bSpans) {
if (a.start == b.start && a.end == b.end) {
return a;
}
}
}
}
function stringifySpan(span: Span) {
return span ? `(${span.start}-${span.end})` : '<undefined>';
}
function stringifySpans(spans: Span[]) {
return spans ? `[${spans.map(stringifySpan).join(', ')}]` : '<empty>';
}