/**
 * Copyright (c) Facebook, Inc. and its affiliates.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
 * @emails oncall+recoil
 * @flow strict-local
 * @format
 */
'use strict';

const {
  getRecoilTestFn
} = require('recoil-shared/__test_utils__/Recoil_TestingUtils');

let cacheFromPolicy;
const testRecoil = getRecoilTestFn(() => {
  cacheFromPolicy = require('../Recoil_cacheFromPolicy');
});
describe('cacheFromPolicy()', () => {
  testRecoil('equality: reference, eviction: keep-all', () => {
    const policy = {
      equality: 'reference',
      eviction: 'keep-all'
    };
    const cache = cacheFromPolicy<{
      [string]: number
    }, boolean>(policy);
    const obj1 = {
      a: 1
    };
    const obj2 = {
      b: 2
    };
    const obj3 = {
      c: 3
    };
    cache.set(obj1, true);
    cache.set(obj2, true);
    cache.set(obj3, true);
    expect(cache.size()).toBe(3);
    expect(cache.get(obj1)).toBe(true);
    expect(cache.get(obj2)).toBe(true);
    expect(cache.get(obj3)).toBe(true);
    expect(cache.get({ ...obj1
    })).toBe(undefined);
    expect(cache.get({ ...obj2
    })).toBe(undefined);
    expect(cache.get({ ...obj3
    })).toBe(undefined);
  });
  testRecoil('equality: value, eviction: keep-all', () => {
    const policy = {
      equality: 'value',
      eviction: 'keep-all'
    };
    const cache = cacheFromPolicy<{
      [string]: number
    }, boolean>(policy);
    const obj1 = {
      a: 1
    };
    const obj2 = {
      b: 2
    };
    const obj3 = {
      c: 3
    };
    cache.set(obj1, true);
    cache.set(obj2, true);
    cache.set(obj3, true);
    expect(cache.size()).toBe(3);
    expect(cache.get(obj1)).toBe(true);
    expect(cache.get(obj2)).toBe(true);
    expect(cache.get(obj3)).toBe(true);
    expect(cache.get({ ...obj1
    })).toBe(true);
    expect(cache.get({ ...obj2
    })).toBe(true);
    expect(cache.get({ ...obj3
    })).toBe(true);
  });
  testRecoil('equality: reference, eviction: lru', () => {
    const policy = {
      equality: 'reference',
      eviction: 'lru',
      maxSize: 2
    };
    const cache = cacheFromPolicy<{
      [string]: number
    }, boolean>(policy);
    const obj1 = {
      a: 1
    };
    const obj2 = {
      b: 2
    };
    const obj3 = {
      c: 3
    };
    cache.set(obj1, true);
    cache.set(obj2, true);
    cache.set(obj3, true);
    expect(cache.size()).toBe(2);
    expect(cache.get(obj1)).toBe(undefined);
    expect(cache.get(obj2)).toBe(true);
    expect(cache.get(obj3)).toBe(true);
    cache.set(obj1, true);
    expect(cache.size()).toBe(2);
    expect(cache.get(obj2)).toBe(undefined);
    expect(cache.get(obj1)).toBe(true);
    expect(cache.get(obj3)).toBe(true);
    expect(cache.get({ ...obj1
    })).toBe(undefined);
    expect(cache.get({ ...obj3
    })).toBe(undefined);
  });
  testRecoil('equality: value, eviction: lru', () => {
    const policy = {
      equality: 'value',
      eviction: 'lru',
      maxSize: 2
    };
    const cache = cacheFromPolicy<{
      [string]: number
    }, boolean>(policy);
    const obj1 = {
      a: 1
    };
    const obj2 = {
      b: 2
    };
    const obj3 = {
      c: 3
    };
    cache.set(obj1, true);
    cache.set(obj2, true);
    cache.set(obj3, true);
    expect(cache.size()).toBe(2);
    expect(cache.get(obj1)).toBe(undefined);
    expect(cache.get(obj2)).toBe(true);
    expect(cache.get(obj3)).toBe(true);
    cache.set(obj1, true);
    expect(cache.size()).toBe(2);
    expect(cache.get(obj2)).toBe(undefined);
    expect(cache.get(obj1)).toBe(true);
    expect(cache.get(obj3)).toBe(true);
    expect(cache.get({ ...obj2
    })).toBe(undefined);
    expect(cache.get({ ...obj1
    })).toBe(true);
    expect(cache.get({ ...obj3
    })).toBe(true);
  });
  testRecoil('equality: reference, eviction: most-recent', () => {
    const policy = {
      equality: 'reference',
      eviction: 'most-recent'
    };
    const cache = cacheFromPolicy<{
      [string]: number
    }, boolean>(policy);
    const obj1 = {
      a: 1
    };
    const obj2 = {
      b: 2
    };
    const obj3 = {
      c: 3
    };
    cache.set(obj1, true);
    cache.set(obj2, true);
    cache.set(obj3, true);
    expect(cache.size()).toBe(1);
    expect(cache.get(obj1)).toBe(undefined);
    expect(cache.get(obj2)).toBe(undefined);
    expect(cache.get(obj3)).toBe(true);
    cache.set(obj1, true);
    expect(cache.size()).toBe(1);
    expect(cache.get(obj2)).toBe(undefined);
    expect(cache.get(obj3)).toBe(undefined);
    expect(cache.get(obj1)).toBe(true);
    expect(cache.get({ ...obj2
    })).toBe(undefined);
    expect(cache.get({ ...obj1
    })).toBe(undefined);
    expect(cache.get({ ...obj3
    })).toBe(undefined);
  });
  testRecoil('equality: value, eviction: most-recent', () => {
    const policy = {
      equality: 'value',
      eviction: 'most-recent'
    };
    const cache = cacheFromPolicy<{
      [string]: number
    }, boolean>(policy);
    const obj1 = {
      a: 1
    };
    const obj2 = {
      b: 2
    };
    const obj3 = {
      c: 3
    };
    cache.set(obj1, true);
    cache.set(obj2, true);
    cache.set(obj3, true);
    expect(cache.size()).toBe(1);
    expect(cache.get(obj1)).toBe(undefined);
    expect(cache.get(obj2)).toBe(undefined);
    expect(cache.get(obj3)).toBe(true);
    cache.set(obj1, true);
    expect(cache.size()).toBe(1);
    expect(cache.get(obj2)).toBe(undefined);
    expect(cache.get(obj3)).toBe(undefined);
    expect(cache.get(obj1)).toBe(true);
    expect(cache.get({ ...obj2
    })).toBe(undefined);
    expect(cache.get({ ...obj3
    })).toBe(undefined);
    expect(cache.get({ ...obj1
    })).toBe(true);
  });
});