@linkedmink/multilevel-aging-cache/tests/storage/MemoryStorageProvider.test.ts

Package provides an interface to cache and persist data to Redis, MongoDB, memory

import { MemoryStorageProvider } from 'storage/MemoryStorageProvider';
import { setGlobalMockTransport } from '../MockTransport';

describe(MemoryStorageProvider.name, () => {
  let provider: MemoryStorageProvider<string, string>;

  beforeAll(() => {
    setGlobalMockTransport();
  });

  beforeEach(() => {
    provider = new MemoryStorageProvider();
  });

  test('should return instance when constructor parameters are valid', () => {
    expect(provider).toBeDefined();
  });

  test('should set a key/value when set is called', () => {
    const testKey = 'TEST_KEY';
    const testValue = { value: 'TEST_VALUE', age: 0 };

    provider.set(testKey, testValue);

    return provider.get(testKey).then(retrieved => {
      expect(retrieved).toEqual(testValue);
    });
  });

  test('should delete a key/value when delete is called', () => {
    const testKey = 'TEST_KEY';
    const testValue = { value: 'TEST_VALUE', age: 0 };

    provider.set(testKey, testValue);
    provider.delete(testKey);

    return provider.get(testKey).then(retrieved => {
      expect(retrieved).toBeNull();
    });
  });

  test('should return keys when keys is called', () => {
    const testKeys = ['TEST_KEY1', 'TEST_KEY2', 'TEST_KEY3', 'TEST_KEY4'];
    const testValue = { value: 'TEST_VALUE', age: 0 };

    testKeys.forEach(key => provider.set(key, testValue));

    return provider.keys().then(keys => {
      expect(keys.length).toEqual(testKeys.length);
      keys.forEach(key => expect(testKeys.includes(key)).toEqual(true));
    });
  });

  test('should return number of keys when size is called', () => {
    const testKeys = ['TEST_KEY1', 'TEST_KEY2', 'TEST_KEY3', 'TEST_KEY4'];
    const testValue = { value: 'TEST_VALUE', age: 0 };

    testKeys.forEach(key => provider.set(key, testValue));

    return provider.size().then(size => {
      expect(size).toEqual(testKeys.length);
    });
  });
});