app/utils/config-property.spec.ts

0001 import {ConfigProperty} from "./config-property"
0002
0003 describe('ConfigProperty', () => {
0004   let configProperty: ConfigProperty<string>;
0005   let mockSaveCallback: jasmine.Spy;
0006   let defaultValue: string;
0007   let key: string;
0008
0009   beforeEach(() => {
0010     key = 'testKey';
0011     defaultValue = 'default';
0012     mockSaveCallback = jasmine.createSpy('saveCallback');
0013
0014     configProperty = new ConfigProperty<string>(key, defaultValue, mockSaveCallback);
0015   });
0016
0017   it('should initialize with default value if no value in localStorage', () => {
0018     localStorage.removeItem(key);
0019     configProperty = new ConfigProperty<string>(key, defaultValue);
0020     expect(configProperty.value).toBe(defaultValue);
0021   });
0022
0023   it('should use stored value if available', () => {
0024     const storedValue = "stored";
0025     localStorage.setItem(key, storedValue);
0026     configProperty = new ConfigProperty<string>(key, defaultValue);
0027     expect(configProperty.value).toBe(storedValue);
0028   });
0029
0030   it('should call saveCallback when setting value', () => {
0031     const newValue = 'new value';
0032     configProperty.value = newValue;
0033     expect(configProperty.value).toBe(newValue);
0034     expect(mockSaveCallback).toHaveBeenCalled();
0035   });
0036
0037   it('should not change value if validator fails', () => {
0038     const badValue = 'bad';
0039     configProperty = new ConfigProperty<string>(key, defaultValue, mockSaveCallback, (value) => false);
0040     configProperty.value = badValue;
0041
0042     expect(configProperty.value).toBe(defaultValue); // Still the default, not the bad value
0043     expect(mockSaveCallback).not.toHaveBeenCalled();
0044   });
0045
0046   // Additional tests to cover other scenarios...
0047 });