angular-docs-cn/packages/language-service/test/utils_spec.ts

124 lines
4.1 KiB
TypeScript

/**
* @license
* Copyright Google LLC 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 ng from '@angular/compiler';
import * as ts from 'typescript';
import {getClassDeclFromDecoratorProp, getDirectiveClassLike} from '../src/ts_utils';
import {getPathToNodeAtPosition} from '../src/utils';
import {MockTypescriptHost} from './test_utils';
describe('getDirectiveClassLike', () => {
it('should return a directive class', () => {
const sourceFile = ts.createSourceFile(
'foo.ts', `
@NgModule({
declarations: [],
})
class AppModule {}
`,
ts.ScriptTarget.ES2015);
const result = sourceFile.forEachChild(c => {
const directive = getDirectiveClassLike(c);
if (directive) {
return directive;
}
});
expect(result).toBeTruthy();
const {decoratorId, classId} = result!;
expect(decoratorId.kind).toBe(ts.SyntaxKind.Identifier);
expect(decoratorId.text).toBe('NgModule');
expect(classId.text).toBe('AppModule');
});
});
describe('getPathToNodeAtPosition', () => {
const html = '<div c></div>';
const nodes: ng.Node[] = [];
beforeAll(() => {
const parser = new ng.HtmlParser();
const {rootNodes, errors} = parser.parse(html, 'url');
expect(errors.length).toBe(0);
nodes.push(...rootNodes);
});
it('should capture element', () => {
// Try to get a path to an element
// <|div c></div>
// ^ cursor is here
const position = html.indexOf('div');
const path = getPathToNodeAtPosition(nodes, position);
// There should be just 1 node in the path, the Element node
expect(path.empty).toBe(false);
expect(path.head instanceof ng.Element).toBe(true);
expect(path.head).toBe(path.tail);
});
it('should capture attribute', () => {
// Try to get a path to an attribute
// <div |c></div>
// ^ cusor is here, before the attribute
const position = html.indexOf('c');
const path = getPathToNodeAtPosition(nodes, position);
expect(path.empty).toBe(false);
expect(path.head instanceof ng.Element).toBe(true);
expect(path.tail instanceof ng.Attribute).toBe(true);
});
it('should capture attribute before cursor', () => {
// Try to get a path to an attribute
// <div c|></div>
// ^ cursor is here, after the attribute
const position = html.indexOf('c') + 1;
const path = getPathToNodeAtPosition(nodes, position);
expect(path.empty).toBe(false);
expect(path.head instanceof ng.Element).toBe(true);
expect(path.tail instanceof ng.Attribute).toBe(true);
});
});
describe('getClassDeclFromTemplateNode', () => {
it('should find class declaration in syntax-only mode', () => {
const sourceFile = ts.createSourceFile(
'foo.ts', `
@Component({
template: '<div></div>'
})
class MyComponent {}`,
ts.ScriptTarget.ES2015, true /* setParentNodes */);
function visit(node: ts.Node): ts.ClassDeclaration|undefined {
if (ts.isPropertyAssignment(node)) {
return getClassDeclFromDecoratorProp(node);
}
return node.forEachChild(visit);
}
const classDecl = sourceFile.forEachChild(visit);
expect(classDecl).toBeTruthy();
expect(classDecl!.kind).toBe(ts.SyntaxKind.ClassDeclaration);
expect((classDecl as ts.ClassDeclaration).name!.text).toBe('MyComponent');
});
it('should return class declaration for AppComponent', () => {
const host = new MockTypescriptHost(['/app/app.component.ts']);
const tsLS = ts.createLanguageService(host);
const sourceFile = tsLS.getProgram()!.getSourceFile('/app/app.component.ts');
expect(sourceFile).toBeTruthy();
const classDecl = sourceFile!.forEachChild(function visit(node): ts.Node|undefined {
if (ts.isPropertyAssignment(node)) {
return getClassDeclFromDecoratorProp(node);
}
return node.forEachChild(visit);
});
expect(classDecl).toBeTruthy();
expect(ts.isClassDeclaration(classDecl!)).toBe(true);
expect((classDecl as ts.ClassDeclaration).name!.text).toBe('AppComponent');
});
});