413 lines
15 KiB
TypeScript
413 lines
15 KiB
TypeScript
/**
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* @license
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* Copyright Google LLC All Rights Reserved.
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*
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* Use of this source code is governed by an MIT-style license that can be
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* found in the LICENSE file at https://angular.io/license
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*/
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import {Diagnostic} from '@angular/compiler-cli';
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import * as ts from 'typescript';
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import {ErrorCode, ngErrorCode} from '../../src/ngtsc/diagnostics';
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import {runInEachFileSystem} from '../../src/ngtsc/file_system/testing';
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import {getTokenAtPosition} from '../../src/ngtsc/util/src/typescript';
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import {loadStandardTestFiles} from '../helpers/src/mock_file_loading';
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import {NgtscTestEnvironment} from './env';
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const testFiles = loadStandardTestFiles();
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runInEachFileSystem(() => {
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describe('ngtsc module scopes', () => {
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let env!: NgtscTestEnvironment;
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beforeEach(() => {
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env = NgtscTestEnvironment.setup(testFiles);
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env.tsconfig();
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});
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describe('diagnostics', () => {
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describe('declarations', () => {
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it('should detect when a random class is declared', () => {
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env.write('test.ts', `
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import {NgModule} from '@angular/core';
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export class RandomClass {}
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@NgModule({
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declarations: [RandomClass],
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})
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export class Module {}
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`);
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const diags = env.driveDiagnostics();
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expect(diags.length).toBe(1);
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const node = diagnosticToNode(diags[0], ts.isIdentifier);
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expect(node.text).toEqual('RandomClass');
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expect(diags[0].messageText).toContain('is not a directive, a component, or a pipe.');
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});
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it('should detect when a declaration lives outside the current compilation', () => {
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env.write('dir.d.ts', `
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import {ɵɵDirectiveDefWithMeta} from '@angular/core';
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export declare class ExternalDir {
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static ɵdir: ɵɵDirectiveDefWithMeta<ExternalDir, '[test]', never, never, never, never>;
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}
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`);
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env.write('test.ts', `
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import {NgModule} from '@angular/core';
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import {ExternalDir} from './dir';
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@NgModule({
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declarations: [ExternalDir],
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})
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export class Module {}
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`);
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const diags = env.driveDiagnostics();
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expect(diags.length).toBe(1);
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const node = diagnosticToNode(diags[0], ts.isIdentifier);
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expect(node.text).toEqual('ExternalDir');
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expect(diags[0].messageText).toContain(`not a part of the current compilation`);
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});
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it('should detect when a declaration is shared between two modules', () => {
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env.write('test.ts', `
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import {Directive, NgModule} from '@angular/core';
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@Directive({selector: '[test]'})
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export class TestDir {}
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@NgModule({
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declarations: [TestDir]
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})
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export class ModuleA {}
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@NgModule({
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declarations: [TestDir],
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})
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export class ModuleB {}
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`);
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const diags = env.driveDiagnostics();
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expect(diags.length).toBe(1);
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const node = findContainingClass(diagnosticToNode(diags[0], ts.isIdentifier));
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expect(node.name!.text).toEqual('TestDir');
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const relatedNodes = new Set(diags[0].relatedInformation!.map(
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related =>
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findContainingClass(diagnosticToNode(related, ts.isIdentifier)).name!.text));
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expect(relatedNodes).toContain('ModuleA');
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expect(relatedNodes).toContain('ModuleB');
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expect(relatedNodes.size).toBe(2);
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});
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it('should detect when a declaration is repeated within the same module', () => {
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env.write('test.ts', `
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import {Directive, NgModule} from '@angular/core';
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@Directive({selector: '[test]'})
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export class TestDir {}
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@NgModule({
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declarations: [TestDir, TestDir],
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})
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export class Module {}
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`);
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const diags = env.driveDiagnostics();
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expect(diags.length).toBe(0);
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});
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it('should detect when a declaration is shared between two modules, and is repeated within them',
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() => {
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env.write('test.ts', `
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import {Directive, NgModule} from '@angular/core';
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@Directive({selector: '[test]'})
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export class TestDir {}
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@NgModule({
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declarations: [TestDir, TestDir]
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})
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export class ModuleA {}
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@NgModule({
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declarations: [TestDir, TestDir],
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})
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export class ModuleB {}
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`);
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const diags = env.driveDiagnostics();
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expect(diags.length).toBe(1);
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const node = findContainingClass(diagnosticToNode(diags[0], ts.isIdentifier));
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expect(node.name!.text).toEqual('TestDir');
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const relatedNodes = new Set(diags[0].relatedInformation!.map(
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related =>
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findContainingClass(diagnosticToNode(related, ts.isIdentifier)).name!.text));
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expect(relatedNodes).toContain('ModuleA');
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expect(relatedNodes).toContain('ModuleB');
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expect(relatedNodes.size).toBe(2);
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});
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});
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describe('imports', () => {
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it('should emit imports in a pure function call', () => {
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env.write('test.ts', `
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import {NgModule} from '@angular/core';
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@NgModule({})
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export class OtherModule {}
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@NgModule({imports: [OtherModule]})
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export class TestModule {}
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`);
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env.driveMain();
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const jsContents = env.getContents('test.js');
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expect(jsContents).toContain('i0.ɵɵdefineNgModule({ type: TestModule });');
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expect(jsContents)
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.toContain(
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'function () { (typeof ngJitMode === "undefined" || ngJitMode) && i0.ɵɵsetNgModuleScope(TestModule, { imports: [OtherModule] }); })();');
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const dtsContents = env.getContents('test.d.ts');
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expect(dtsContents)
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.toContain(
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'static ɵmod: i0.ɵɵNgModuleDefWithMeta<TestModule, never, [typeof OtherModule], never>');
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});
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it('should produce an error when an invalid class is imported', () => {
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env.write('test.ts', `
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import {NgModule} from '@angular/core';
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class NotAModule {}
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@NgModule({imports: [NotAModule]})
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class IsAModule {}
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`);
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const [error] = env.driveDiagnostics();
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expect(error).not.toBeUndefined();
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expect(error.messageText).toContain('IsAModule');
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expect(error.messageText).toContain('NgModule.imports');
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expect(error.code).toEqual(ngErrorCode(ErrorCode.NGMODULE_INVALID_IMPORT));
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expect(diagnosticToNode(error, ts.isIdentifier).text).toEqual('NotAModule');
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});
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it('should produce an error when a non-class is imported from a .d.ts dependency', () => {
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env.write('dep.d.ts', `export declare let NotAClass: Function;`);
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env.write('test.ts', `
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import {NgModule} from '@angular/core';
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import {NotAClass} from './dep';
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@NgModule({imports: [NotAClass]})
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class IsAModule {}
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`);
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const [error] = env.driveDiagnostics();
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expect(error).not.toBeUndefined();
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const messageText = ts.flattenDiagnosticMessageText(error.messageText, '\n');
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expect(messageText)
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.toContain('Value at position 0 in the NgModule.imports of IsAModule is not a class');
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expect(messageText).toContain('Value is a reference to \'NotAClass\'.');
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expect(error.code).toEqual(ngErrorCode(ErrorCode.VALUE_HAS_WRONG_TYPE));
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expect(diagnosticToNode(error, ts.isIdentifier).text).toEqual('NotAClass');
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});
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});
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describe('exports', () => {
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it('should emit exports in a pure function call', () => {
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env.write('test.ts', `
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import {NgModule} from '@angular/core';
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@NgModule({})
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export class OtherModule {}
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@NgModule({exports: [OtherModule]})
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export class TestModule {}
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`);
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env.driveMain();
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const jsContents = env.getContents('test.js');
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expect(jsContents).toContain('i0.ɵɵdefineNgModule({ type: TestModule });');
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expect(jsContents)
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.toContain(
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'(function () { (typeof ngJitMode === "undefined" || ngJitMode) && i0.ɵɵsetNgModuleScope(TestModule, { exports: [OtherModule] }); })();');
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const dtsContents = env.getContents('test.d.ts');
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expect(dtsContents)
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.toContain(
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'static ɵmod: i0.ɵɵNgModuleDefWithMeta<TestModule, never, never, [typeof OtherModule]>');
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});
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it('should produce an error when a non-NgModule class is exported', () => {
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env.write('test.ts', `
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import {NgModule} from '@angular/core';
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class NotAModule {}
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@NgModule({exports: [NotAModule]})
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class IsAModule {}
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`);
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const [error] = env.driveDiagnostics();
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expect(error).not.toBeUndefined();
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expect(error.messageText).toContain('IsAModule');
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expect(error.messageText).toContain('NgModule.exports');
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expect(error.code).toEqual(ngErrorCode(ErrorCode.NGMODULE_INVALID_EXPORT));
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expect(diagnosticToNode(error, ts.isIdentifier).text).toEqual('NotAModule');
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});
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it('should produce a transitive error when an invalid NgModule is exported', () => {
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env.write('test.ts', `
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import {NgModule} from '@angular/core';
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export class NotAModule {}
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@NgModule({
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imports: [NotAModule],
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})
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class InvalidModule {}
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@NgModule({exports: [InvalidModule]})
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class IsAModule {}
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`);
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// Find the diagnostic referencing InvalidModule, which should have come from IsAModule.
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const error = env.driveDiagnostics().find(
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error => diagnosticToNode(error, ts.isIdentifier).text === 'InvalidModule');
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if (error === undefined) {
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return fail('Expected to find a diagnostic referencing InvalidModule');
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}
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expect(error.messageText).toContain('IsAModule');
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expect(error.messageText).toContain('NgModule.exports');
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expect(error.code).toEqual(ngErrorCode(ErrorCode.NGMODULE_INVALID_EXPORT));
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});
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});
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describe('re-exports', () => {
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it('should produce an error when a non-declared/imported class is re-exported', () => {
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env.write('test.ts', `
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import {Directive, NgModule} from '@angular/core';
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@Directive({selector: 'test'})
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class Dir {}
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@NgModule({exports: [Dir]})
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class IsAModule {}
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`);
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const [error] = env.driveDiagnostics();
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expect(error).not.toBeUndefined();
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expect(error.messageText).toContain('IsAModule');
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expect(error.messageText).toContain('NgModule.exports');
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expect(error.code).toEqual(ngErrorCode(ErrorCode.NGMODULE_INVALID_REEXPORT));
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expect(diagnosticToNode(error, ts.isIdentifier).text).toEqual('Dir');
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});
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});
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it('should not produce component template type-check errors if its module is invalid', () => {
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env.tsconfig({'fullTemplateTypeCheck': true});
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// Set up 3 files, each of which declare an NgModule that's invalid in some way. This will
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// produce a bunch of diagnostics related to the issues with the modules. Each module also
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// declares a component with a template that references a <doesnt-exist> element. This test
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// verifies that none of the produced diagnostics mention this nonexistent element, since
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// no template type-checking should be performed for a component that's part of an invalid
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// NgModule.
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// This NgModule declares something which isn't a directive/pipe.
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env.write('invalid-declaration.ts', `
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import {Component, NgModule} from '@angular/core';
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@Component({
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selector: 'test-cmp',
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template: '<doesnt-exist></doesnt-exist>',
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})
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export class TestCmp {}
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export class NotACmp {}
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@NgModule({declarations: [TestCmp, NotACmp]})
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export class Module {}
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`);
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// This NgModule imports something which isn't an NgModule.
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env.write('invalid-import.ts', `
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import {Component, NgModule} from '@angular/core';
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@Component({
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selector: 'test-cmp',
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template: '<doesnt-exist></doesnt-exist>',
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})
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export class TestCmp {}
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export class NotAModule {}
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@NgModule({
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declarations: [TestCmp],
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imports: [NotAModule],
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})
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export class Module {}
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`);
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// This NgModule imports a DepModule which itself is invalid (it declares something which
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// isn't a directive/pipe).
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env.write('transitive-error-in-import.ts', `
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import {Component, NgModule} from '@angular/core';
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@Component({
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selector: 'test-cmp',
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template: '<doesnt-exist></doesnt-exist>',
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})
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export class TestCmp {}
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export class NotACmp {}
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@NgModule({
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declarations: [NotACmp],
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exports: [NotACmp],
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})
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export class DepModule {}
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@NgModule({
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declarations: [TestCmp],
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imports: [DepModule],
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})
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export class Module {}
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`);
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for (const diag of env.driveDiagnostics()) {
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// None of the diagnostics should be related to the fact that the component uses an
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// unknown element, because in all cases the component's scope was invalid.
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expect(diag.messageText)
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.not.toContain(
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'doesnt-exist',
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'Template type-checking ran for a component, when it shouldn\'t have.');
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}
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});
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});
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});
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function diagnosticToNode<T extends ts.Node>(
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diagnostic: ts.Diagnostic|Diagnostic|ts.DiagnosticRelatedInformation,
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guard: (node: ts.Node) => node is T): T {
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const diag = diagnostic as ts.Diagnostic | ts.DiagnosticRelatedInformation;
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if (diag.file === undefined) {
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throw new Error(`Expected ts.Diagnostic to have a file source`);
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}
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const node = getTokenAtPosition(diag.file, diag.start!);
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expect(guard(node)).toBe(true);
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return node as T;
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}
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});
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function findContainingClass(node: ts.Node): ts.ClassDeclaration {
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while (!ts.isClassDeclaration(node)) {
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if (node.parent && node.parent !== node) {
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node = node.parent;
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} else {
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throw new Error('Expected node to have a ClassDeclaration parent');
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}
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}
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return node;
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}
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