import { cloneDeep } from 'lodash' import { VERSION, COMMAND_TRIM_FLAGS, COMMAND_TRIM_FLAGS_AND_RESET, _moveItemInArray, _getRecentData, _getAllFlags, _mergeFlags, _mergePrefs, _resetFlags, mutations, defaultState, newUserFlags } from 'src/modules/serverSideStorage.js' describe('The serverSideStorage module', () => { describe('mutations', () => { describe('setServerSideStorage', () => { const { setServerSideStorage } = mutations const user = { created_at: new Date('1999-02-09'), storage: {} } it('should initialize storage if none present', () => { const state = cloneDeep(defaultState) setServerSideStorage(state, user) expect(state.cache._version).to.eql(VERSION) expect(state.cache._timestamp).to.be.a('number') expect(state.cache.flagStorage).to.eql(defaultState.flagStorage) expect(state.cache.prefsStorage).to.eql(defaultState.prefsStorage) }) it('should initialize storage with proper flags for new users if none present', () => { const state = cloneDeep(defaultState) setServerSideStorage(state, { ...user, created_at: new Date() }) expect(state.cache._version).to.eql(VERSION) expect(state.cache._timestamp).to.be.a('number') expect(state.cache.flagStorage).to.eql(newUserFlags) expect(state.cache.prefsStorage).to.eql(defaultState.prefsStorage) }) it('should merge flags even if remote timestamp is older', () => { const state = { ...cloneDeep(defaultState), cache: { _timestamp: Date.now(), _version: VERSION, ...cloneDeep(defaultState) } } setServerSideStorage( state, { ...user, storage: { _timestamp: 123, _version: VERSION, flagStorage: { ...defaultState.flagStorage, updateCounter: 1 }, prefsStorage: { ...defaultState.prefsStorage } } } ) expect(state.cache.flagStorage).to.eql({ ...defaultState.flagStorage, updateCounter: 1 }) }) it('should reset local timestamp to remote if contents are the same', () => { const state = { ...cloneDeep(defaultState), cache: null } setServerSideStorage( state, { ...user, storage: { _timestamp: 123, _version: VERSION, flagStorage: { ...defaultState.flagStorage, updateCounter: 999 } } } ) expect(state.cache._timestamp).to.eql(123) expect(state.flagStorage.updateCounter).to.eql(999) expect(state.cache.flagStorage.updateCounter).to.eql(999) }) it('should remote version if local missing', () => { const state = cloneDeep(defaultState) setServerSideStorage(state, user) expect(state.cache._version).to.eql(VERSION) expect(state.cache._timestamp).to.be.a('number') expect(state.cache.flagStorage).to.eql(defaultState.flagStorage) }) }) describe('setPreference', () => { const { setPreference, updateCache } = mutations it('should set preference and update journal log accordingly', () => { const state = cloneDeep(defaultState) setPreference(state, { path: 'simple.testing', value: 1 }) expect(state.prefsStorage.simple.testing).to.eql(1) expect(state.prefsStorage._journal.length).to.eql(1) expect(state.prefsStorage._journal[0]).to.eql({ path: 'simple.testing', operation: 'set', args: [1], // should have A timestamp, we don't really care what it is timestamp: state.prefsStorage._journal[0].timestamp }) }) it('should keep journal to a minimum (one entry per path for sets)', () => { const state = cloneDeep(defaultState) setPreference(state, { path: 'simple.testing', value: 1 }) setPreference(state, { path: 'simple.testing', value: 2 }) updateCache(state, { username: 'test' }) expect(state.prefsStorage.simple.testing).to.eql(2) expect(state.prefsStorage._journal.length).to.eql(1) expect(state.prefsStorage._journal[0]).to.eql({ path: 'simple.testing', operation: 'set', args: [2], // should have A timestamp, we don't really care what it is timestamp: state.prefsStorage._journal[0].timestamp }) }) }) }) describe('helper functions', () => { describe('_moveItemInArray', () => { it('should move item according to movement value', () => { expect(_moveItemInArray([1, 2, 3, 4], 4, -1)).to.eql([1, 2, 4, 3]) expect(_moveItemInArray([1, 2, 3, 4], 1, 2)).to.eql([2, 3, 1, 4]) }) it('should clamp movement to within array', () => { expect(_moveItemInArray([1, 2, 3, 4], 4, -10)).to.eql([4, 1, 2, 3]) expect(_moveItemInArray([1, 2, 3, 4], 3, 99)).to.eql([1, 2, 4, 3]) }) }) describe('_getRecentData', () => { it('should handle nulls correctly', () => { expect(_getRecentData(null, null)).to.eql({ recent: null, stale: null, needUpload: true }) }) it('doesn\'t choke on invalid data', () => { expect(_getRecentData({ a: 1 }, { b: 2 })).to.eql({ recent: null, stale: null, needUpload: true }) }) it('should prefer the valid non-null correctly, needUpload works properly', () => { const nonNull = { _version: VERSION, _timestamp: 1 } expect(_getRecentData(nonNull, null)).to.eql({ recent: nonNull, stale: null, needUpload: true }) expect(_getRecentData(null, nonNull)).to.eql({ recent: nonNull, stale: null, needUpload: false }) }) it('should prefer the one with higher timestamp', () => { const a = { _version: VERSION, _timestamp: 1 } const b = { _version: VERSION, _timestamp: 2 } expect(_getRecentData(a, b)).to.eql({ recent: b, stale: a, needUpload: false }) expect(_getRecentData(b, a)).to.eql({ recent: b, stale: a, needUpload: false }) }) it('case where both are same', () => { const a = { _version: VERSION, _timestamp: 3 } const b = { _version: VERSION, _timestamp: 3 } expect(_getRecentData(a, b)).to.eql({ recent: b, stale: a, needUpload: false }) expect(_getRecentData(b, a)).to.eql({ recent: b, stale: a, needUpload: false }) }) }) describe('_getAllFlags', () => { it('should handle nulls properly', () => { expect(_getAllFlags(null, null)).to.eql([]) }) it('should output list of keys if passed single object', () => { expect(_getAllFlags({ flagStorage: { a: 1, b: 1, c: 1 } }, null)).to.eql(['a', 'b', 'c']) }) it('should union keys of both objects', () => { expect(_getAllFlags({ flagStorage: { a: 1, b: 1, c: 1 } }, { flagStorage: { c: 1, d: 1 } })).to.eql(['a', 'b', 'c', 'd']) }) }) describe('_mergeFlags', () => { it('should handle merge two flag sets correctly picking higher numbers', () => { expect( _mergeFlags( { flagStorage: { a: 0, b: 3 } }, { flagStorage: { b: 1, c: 4, d: 9 } }, ['a', 'b', 'c', 'd']) ).to.eql({ a: 0, b: 3, c: 4, d: 9 }) }) }) describe('_mergePrefs', () => { it('should prefer recent and apply journal to it', () => { expect( _mergePrefs( // RECENT { simple: { a: 1, b: 0, c: true }, _journal: [ { path: 'simple.b', operation: 'set', args: [0], timestamp: 2 }, { path: 'simple.c', operation: 'set', args: [true], timestamp: 4 } ] }, // STALE { simple: { a: 1, b: 1, c: false }, _journal: [ { path: 'simple.a', operation: 'set', args: [1], timestamp: 1 }, { path: 'simple.b', operation: 'set', args: [1], timestamp: 3 } ] } ) ).to.eql({ simple: { a: 1, b: 1, c: true }, _journal: [ { path: 'simple.a', operation: 'set', args: [1], timestamp: 1 }, { path: 'simple.b', operation: 'set', args: [1], timestamp: 3 }, { path: 'simple.c', operation: 'set', args: [true], timestamp: 4 } ] }) }) it('should allow setting falsy values', () => { expect( _mergePrefs( // RECENT { simple: { a: 1, b: 0, c: false }, _journal: [ { path: 'simple.b', operation: 'set', args: [0], timestamp: 2 }, { path: 'simple.c', operation: 'set', args: [false], timestamp: 4 } ] }, // STALE { simple: { a: 0, b: 0, c: true }, _journal: [ { path: 'simple.a', operation: 'set', args: [0], timestamp: 1 }, { path: 'simple.b', operation: 'set', args: [0], timestamp: 3 } ] } ) ).to.eql({ simple: { a: 0, b: 0, c: false }, _journal: [ { path: 'simple.a', operation: 'set', args: [0], timestamp: 1 }, { path: 'simple.b', operation: 'set', args: [0], timestamp: 3 }, { path: 'simple.c', operation: 'set', args: [false], timestamp: 4 } ] }) }) it('should work with strings', () => { expect( _mergePrefs( // RECENT { simple: { a: 'foo' }, _journal: [ { path: 'simple.a', operation: 'set', args: ['foo'], timestamp: 2 } ] }, // STALE { simple: { a: 'bar' }, _journal: [ { path: 'simple.a', operation: 'set', args: ['bar'], timestamp: 4 } ] } ) ).to.eql({ simple: { a: 'bar' }, _journal: [ { path: 'simple.a', operation: 'set', args: ['bar'], timestamp: 4 } ] }) }) }) describe('_resetFlags', () => { it('should reset all known flags to 0 when reset flag is set to > 0 and < 9000', () => { const totalFlags = { a: 0, b: 3, reset: 1 } expect(_resetFlags(totalFlags)).to.eql({ a: 0, b: 0, reset: 0 }) }) it('should trim all flags to known when reset is set to 1000', () => { const totalFlags = { a: 0, b: 3, c: 33, reset: COMMAND_TRIM_FLAGS } expect(_resetFlags(totalFlags, { a: 0, b: 0, reset: 0 })).to.eql({ a: 0, b: 3, reset: 0 }) }) it('should trim all flags to known and reset when reset is set to 1001', () => { const totalFlags = { a: 0, b: 3, c: 33, reset: COMMAND_TRIM_FLAGS_AND_RESET } expect(_resetFlags(totalFlags, { a: 0, b: 0, reset: 0 })).to.eql({ a: 0, b: 0, reset: 0 }) }) }) }) })