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Mock localStorage for jasmine tests in TypeScript. This is the testing script. Copy the parts between snip and snap to mock your localStorage
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/// <reference path="../../library.test.d.ts"/> | |
import * as angular from "angular"; angular; | |
import * as mocks from "angular-mocks/ngMock"; mocks; | |
describe('feat(localStorage Mock): ', function() { | |
beforeAll(() => { | |
angular.module('mock-module',[]) | |
}); | |
// --- snip --- | |
// Mock localStorage | |
beforeEach(() => { | |
var store = {}; | |
spyOn(localStorage, 'getItem').and.callFake( (key:string):String => { | |
return store[key] || null; | |
}); | |
spyOn(localStorage, 'removeItem').and.callFake((key:string):void => { | |
delete store[key]; | |
}); | |
spyOn(localStorage, 'setItem').and.callFake((key:string, value:string):string => { | |
return store[key] = <string>value; | |
}); | |
spyOn(localStorage, 'clear').and.callFake(() => { | |
store = {}; | |
}); | |
}); | |
// --- snap --- | |
beforeEach(()=> { | |
angular.mock.module('mock-module'); | |
}); | |
it('should set an Item', () => { | |
expect(localStorage.setItem('foo', 'bar')).toBe('bar'); // bar | |
expect(localStorage.getItem('foo')).toBe('bar'); // bar | |
}); | |
it('should return null for non existing items', () => { | |
expect(localStorage.getItem('foo')).toBeNull(); // null | |
}); | |
it('should set and remove Item', () => { | |
expect(localStorage.setItem('foo', 'bar')).toBe('bar'); // bar | |
expect(localStorage.removeItem('foo')).toBeUndefined(); // undefined | |
expect(localStorage.getItem('foo')).toBeNull(); // null | |
}); | |
it('should clear the storage', () => { | |
expect(localStorage.setItem('foo', 'bar')).toBe('bar'); // bar | |
expect(localStorage.setItem('bar', 'foo')).toBe('foo'); // foo | |
expect(localStorage.clear()).toBeUndefined(); // undefined | |
expect(localStorage.getItem('foo')).toBeNull(); // null | |
expect(localStorage.getItem('bar')).toBeNull(); // null | |
}); | |
}); |
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