7dcf2864a3
The linker is implemented using a Babel transform such that Babel needs to parse and walk a source file to find the declarations that need to be compiled. If it can be determined that a source file is known not to contain any declarations the parsing and walking can be skipped as a performance improvement. This commit adds an exposed function for tools that integrate the linker to use to allow short-circuiting of the linker transform. PR Close #40137
68 lines
1.9 KiB
TypeScript
68 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 {needsLinking} from '../../src/file_linker/needs_linking';
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describe('needsLinking', () => {
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it('should return true for directive declarations', () => {
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expect(needsLinking('file.js', `
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export class Dir {
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ɵdir = ɵɵngDeclareDirective({type: Dir});
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}
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`)).toBeTrue();
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});
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it('should return true for namespaced directive declarations', () => {
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expect(needsLinking('file.js', `
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export class Dir {
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ɵdir = ng.ɵɵngDeclareDirective({type: Dir});
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}
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`)).toBeTrue();
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});
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it('should return true for unrelated usages of ɵɵngDeclareDirective', () => {
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expect(needsLinking('file.js', `
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const fnName = 'ɵɵngDeclareDirective';
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`)).toBeTrue();
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});
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it('should return false when the file does not contain ɵɵngDeclareDirective', () => {
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expect(needsLinking('file.js', `
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const foo = ngDeclareDirective;
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`)).toBeFalse();
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});
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it('should return true for component declarations', () => {
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expect(needsLinking('file.js', `
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export class Cmp {
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ɵdir = ɵɵngDeclareComponent({type: Cmp});
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}
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`)).toBeTrue();
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});
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it('should return true for namespaced component declarations', () => {
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expect(needsLinking('file.js', `
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export class Cmp {
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ɵdir = ng.ɵɵngDeclareComponent({type: Cmp});
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}
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`)).toBeTrue();
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});
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it('should return true for unrelated usages of ɵɵngDeclareComponent', () => {
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expect(needsLinking('file.js', `
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const fnName = 'ɵɵngDeclareComponent';
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`)).toBeTrue();
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});
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it('should return false when the file does not contain ɵɵngDeclareComponent', () => {
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expect(needsLinking('file.js', `
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const foo = ngDeclareComponent;
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`)).toBeFalse();
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});
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});
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