web/test/cache-object_test.ts

import {CacheObject} from '../cache-object.js';

suite('CacheObject', () => {
  let cacheObj: CacheObject;

  setup(() => {
    cacheObj = new CacheObject('cacheObjectTest');
  });

  teardown(() => {
    cacheObj.clear();
  });

  test('read with empty cache returns empty object', () => {
    assert.deepEqual(cacheObj.read(), {});
  });

  test('read with corrupted cache returns empty object', () => {
    cacheObj.write({a: 1});
    localStorage.setItem(cacheObj.key, '1');
    assert.deepEqual(cacheObj.read(), {});
  });

  test('write followed by read succeeds', () => {
    cacheObj.write({a: 1});
    assert.deepEqual(cacheObj.read(), {a: 1});
  });

  test('write then read by second CacheObject succeeds', () => {
    cacheObj.write({a: 1});
    const obj2 = new CacheObject('cacheObjectTest');
    assert.deepEqual(obj2.read(), {a: 1});
  });

  test('write then clear then read yields empty object', () => {
    cacheObj.write({a: 1});
    cacheObj.clear();
    assert.deepEqual(cacheObj.read(), {});
  });

  test('write with a non-object throws an error', () => {
    assert.throws(
      () => cacheObj.write([]), 'obj parameter value is not an Object');
  });
});