7e742aea7c
This commit adds the basic building blocks for linking partial declarations.
In particular it provides a generic `FileLinker` class that delegates to
a set of (not yet implemented) `PartialLinker` classes.
The Babel plugin makes use of this `FileLinker` providing concrete classes
for `AstHost` and `AstFactory` that work with Babel AST. It can be created
with the following code:
```ts
const plugin = createEs2015LinkerPlugin({ /* options */ });
```
PR Close #39116
48 lines
1.9 KiB
TypeScript
48 lines
1.9 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 * as o from '@angular/compiler';
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import {ImportGenerator, NamedImport, TypeScriptAstFactory} from '@angular/compiler-cli/src/ngtsc/translator';
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import * as ts from 'typescript';
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import {Translator} from '../../src/file_linker/translator';
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import {generate} from './helpers';
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describe('Translator', () => {
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let factory: TypeScriptAstFactory;
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beforeEach(() => factory = new TypeScriptAstFactory());
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describe('translateExpression()', () => {
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it('should generate expression specific output', () => {
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const translator = new Translator<ts.Statement, ts.Expression>(factory);
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const outputAst = new o.WriteVarExpr('foo', new o.LiteralExpr(42));
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const translated = translator.translateExpression(outputAst, new MockImportGenerator());
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expect(generate(translated)).toEqual('(foo = 42)');
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});
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});
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describe('translateStatement()', () => {
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it('should generate statement specific output', () => {
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const translator = new Translator<ts.Statement, ts.Expression>(factory);
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const outputAst = new o.ExpressionStatement(new o.WriteVarExpr('foo', new o.LiteralExpr(42)));
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const translated = translator.translateStatement(outputAst, new MockImportGenerator());
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expect(generate(translated)).toEqual('foo = 42;');
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});
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});
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class MockImportGenerator implements ImportGenerator<ts.Expression> {
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generateNamespaceImport(moduleName: string): ts.Expression {
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return factory.createLiteral(moduleName);
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}
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generateNamedImport(moduleName: string, originalSymbol: string): NamedImport<ts.Expression> {
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return {
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moduleImport: factory.createLiteral(moduleName),
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symbol: originalSymbol,
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};
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}
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}
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});
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