angular-cn/packages/language-service/ivy/test/mock_host.ts

78 lines
2.6 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 {join} from 'path';
import * as ts from 'typescript/lib/tsserverlibrary';
const logger: ts.server.Logger = {
close(): void{},
hasLevel(level: ts.server.LogLevel): boolean {
return false;
},
loggingEnabled(): boolean {
return false;
},
perftrc(s: string): void{},
info(s: string): void{},
startGroup(): void{},
endGroup(): void{},
msg(s: string, type?: ts.server.Msg): void{},
getLogFileName(): string |
undefined {
return;
},
};
export const TEST_SRCDIR = process.env.TEST_SRCDIR!;
export const PROJECT_DIR =
join(TEST_SRCDIR, 'angular', 'packages', 'language-service', 'test', 'project');
export const TSCONFIG = join(PROJECT_DIR, 'tsconfig.json');
export const APP_COMPONENT = join(PROJECT_DIR, 'app', 'app.component.ts');
export const APP_MAIN = join(PROJECT_DIR, 'app', 'main.ts');
export const PARSING_CASES = join(PROJECT_DIR, 'app', 'parsing-cases.ts');
export const host: ts.server.ServerHost = {
...ts.sys,
readFile(absPath: string, encoding?: string): string |
undefined {
// TODO: Need to remove all annotations in templates like we do in
// MockTypescriptHost
return ts.sys.readFile(absPath, encoding);
},
// TODO: Need to cast as never because this is not a proper ServerHost interface.
// ts.sys lacks methods like watchFile() and watchDirectory(), but these are not
// needed for now.
} as never;
/**
* Create a ConfiguredProject and an actual program for the test project located
* in packages/language-service/test/project. Project creation exercises the
* actual code path, but a mock host is used for the filesystem to intercept
* and modify test files.
*/
export function setup() {
const projectService = new ts.server.ProjectService({
host,
logger,
cancellationToken: ts.server.nullCancellationToken,
useSingleInferredProject: true,
useInferredProjectPerProjectRoot: true,
typingsInstaller: ts.server.nullTypingsInstaller,
});
// Opening APP_COMPONENT forces a new ConfiguredProject to be created based
// on the tsconfig.json in the test project.
projectService.openClientFile(APP_COMPONENT);
const project = projectService.findProject(TSCONFIG);
if (!project) {
throw new Error(`Failed to create project for ${TSCONFIG}`);
}
// The following operation forces a ts.Program to be created.
const tsLS = project.getLanguageService();
return {projectService, project, tsLS};
}