c38195f59e
Previously, in cases were values were expensive to compute and would be used multiple times, a combination of a regular `Map` and a helper function (`getOrDefault()`) was used to ensure values were only computed once. This commit uses a special `Map`-like structure to compute and memoize such expensive values without the need to a helper function. PR Close #34512
93 lines
3.2 KiB
TypeScript
93 lines
3.2 KiB
TypeScript
/**
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* @license
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* Copyright Google Inc. 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 {FactoryMap, isRelativePath, stripExtension} from '../src/utils';
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describe('FactoryMap', () => {
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it('should return an existing value', () => {
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const factoryFnSpy = jasmine.createSpy('factory');
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const factoryMap = new FactoryMap<string, string>(factoryFnSpy, [['k1', 'v1'], ['k2', 'v2']]);
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expect(factoryMap.get('k1')).toBe('v1');
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expect(factoryMap.get('k2')).toBe('v2');
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expect(factoryFnSpy).not.toHaveBeenCalled();
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});
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it('should not treat falsy values as missing', () => {
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const factoryFnSpy = jasmine.createSpy('factory').and.returnValue('never gonna happen');
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const factoryMap = new FactoryMap<string, any>(factoryFnSpy, [
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['k1', ''],
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['k2', 0],
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['k3', false],
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['k4', null],
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['k5', undefined],
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]);
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expect(factoryMap.get('k1')).toBe('');
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expect(factoryMap.get('k2')).toBe(0);
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expect(factoryMap.get('k3')).toBe(false);
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expect(factoryMap.get('k4')).toBe(null);
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expect(factoryMap.get('k5')).toBe(undefined);
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expect(factoryFnSpy).not.toHaveBeenCalled();
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});
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it('should create, store and return the value if it does not exist', () => {
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const factoryFnSpy = jasmine.createSpy('factory').and.returnValues('v3', 'never gonna happen');
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const factoryMap = new FactoryMap(factoryFnSpy, [['k1', 'v1'], ['k2', 'v2']]);
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expect(factoryMap.get('k3')).toBe('v3');
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expect(factoryFnSpy).toHaveBeenCalledTimes(1);
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factoryFnSpy.calls.reset();
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expect(factoryMap.get('k3')).toBe('v3');
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expect(factoryFnSpy).not.toHaveBeenCalled();
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});
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});
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describe('isRelativePath()', () => {
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it('should return true for relative paths', () => {
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expect(isRelativePath('.')).toBe(true);
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expect(isRelativePath('..')).toBe(true);
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expect(isRelativePath('./')).toBe(true);
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expect(isRelativePath('../')).toBe(true);
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expect(isRelativePath('./abc/xyz')).toBe(true);
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expect(isRelativePath('../abc/xyz')).toBe(true);
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});
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it('should return true for absolute paths', () => {
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expect(isRelativePath('/')).toBe(true);
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expect(isRelativePath('/abc/xyz')).toBe(true);
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});
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it('should return false for other paths', () => {
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expect(isRelativePath('abc')).toBe(false);
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expect(isRelativePath('abc/xyz')).toBe(false);
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expect(isRelativePath('.abc')).toBe(false);
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expect(isRelativePath('..abc')).toBe(false);
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expect(isRelativePath('@abc')).toBe(false);
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expect(isRelativePath('.abc/xyz')).toBe(false);
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expect(isRelativePath('..abc/xyz')).toBe(false);
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expect(isRelativePath('@abc/xyz')).toBe(false);
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});
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});
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describe('stripExtension()', () => {
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it('should strip the extension from a file name', () => {
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expect(stripExtension('foo.ts')).toBe('foo');
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expect(stripExtension('/foo/bar.ts')).toBe('/foo/bar');
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expect(stripExtension('/foo/bar.d.ts')).toBe('/foo/bar');
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});
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it('should do nothing if there is no extension in a file name', () => {
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expect(stripExtension('foo')).toBe('foo');
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expect(stripExtension('/foo/bar')).toBe('/foo/bar');
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expect(stripExtension('/fo-o/b_ar')).toBe('/fo-o/b_ar');
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});
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});
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