Add session ID test

src/analytics/identifiers/session.test.ts

@@ -0,0 +1,79 @@
+jest.mock('#/storage', () => ({
+  device: {
+    get: jest.fn(),
+    set: jest.fn(),
+  },
+}))
+
+jest.mock('#/analytics/identifiers/util', () => ({
+  isSessionIdExpired: jest.fn(),
+}))
+
+jest.mock('#/lib/appState', () => ({
+  onAppStateChange: jest.fn(() => ({remove: jest.fn()})),
+}))
+
+beforeEach(() => {
+  jest.resetModules()
+  jest.clearAllMocks()
+})
+
+function getMocks() {
+  const {device} = require('#/storage')
+  const {isSessionIdExpired} = require('#/analytics/identifiers/util')
+  return {
+    device: jest.mocked(device),
+    isSessionIdExpired: jest.mocked(isSessionIdExpired),
+  }
+}
+
+describe('session initialization', () => {
+  it('creates new session and sets timestamp when none exists', () => {
+    const {device, isSessionIdExpired} = getMocks()
+    device.get.mockReturnValue(undefined)
+    isSessionIdExpired.mockReturnValue(false)
+
+    const {getInitialSessionId} = require('./session')
+    const id = getInitialSessionId()
+
+    expect(id).toBeDefined()
+    expect(typeof id).toBe('string')
+    expect(device.set).toHaveBeenCalledWith(['nativeSessionId'], id)
+    expect(device.set).toHaveBeenCalledWith(
+      ['nativeSessionIdLastEventAt'],
+      expect.any(Number),
+    )
+  })
+
+  it('reuses existing session when not expired', () => {
+    const {device, isSessionIdExpired} = getMocks()
+    const existingId = 'existing-session-id'
+    device.get.mockImplementation((key: string[]) => {
+      if (key[0] === 'nativeSessionId') return existingId
+      if (key[0] === 'nativeSessionIdLastEventAt') return Date.now()
+      return undefined
+    })
+    isSessionIdExpired.mockReturnValue(false)
+
+    const {getInitialSessionId} = require('./session')
+
+    expect(getInitialSessionId()).toBe(existingId)
+  })
+
+  it('creates new session when existing is expired', () => {
+    const {device, isSessionIdExpired} = getMocks()
+    const existingId = 'existing-session-id'
+    device.get.mockImplementation((key: string[]) => {
+      if (key[0] === 'nativeSessionId') return existingId
+      if (key[0] === 'nativeSessionIdLastEventAt') return Date.now() - 999999
+      return undefined
+    })
+    isSessionIdExpired.mockReturnValue(true)
+
+    const {getInitialSessionId} = require('./session')
+    const id = getInitialSessionId()
+
+    expect(id).not.toBe(existingId)
+    expect(device.set).toHaveBeenCalledWith(['nativeSessionId'], id)
+  })
+})