chore: more tests for client bus

Author: AlemTuzlak

packages/event-bus/tests/index.test.ts

@@ -1,7 +1,88 @@
-import { describe, expect, it } from 'vitest'
+import { afterEach, describe, expect, it, vi } from 'vitest'
+import { ClientEventBus } from '../src/client'
 
-describe('devtools', () => {
-  it('should pass', () => {
-    expect(true).toBe(true)
+describe('ClientEventBus', () => {
+  describe('debug', () => {
+    afterEach(() => {
+      vi.restoreAllMocks()
+    })
+    it('should log events to the console when debug set to true', () => {
+      const logSpy = vi.spyOn(console, 'log').mockImplementation(() => {})
+      const clientBus = new ClientEventBus({ debug: true })
+      clientBus.start()
+
+      expect(logSpy).toHaveBeenCalledWith(
+        '🌴 [tanstack-devtools:client-bus]',
+        'Initializing client event bus',
+      )
+      logSpy.mockRestore()
+      clientBus.stop()
+    })
+
+    it('should not log events to the console when debug set to false', () => {
+      const logSpy = vi.spyOn(console, 'log').mockImplementation(() => {})
+      const clientBus = new ClientEventBus({ debug: false })
+      clientBus.start()
+
+      expect(logSpy).not.toHaveBeenCalled()
+      logSpy.mockRestore()
+      clientBus.stop()
+    })
+  })
+  it('should emit events to a subscribed listener', () => {
+    const clientBus = new ClientEventBus()
+    clientBus.start()
+    const handler = vi.fn()
+    window.addEventListener('test:event', handler)
+
+    window.dispatchEvent(
+      new CustomEvent('tanstack-dispatch-event', {
+        detail: {
+          type: 'test:event',
+          payload: { foo: 'bar' },
+        },
+      }),
+    )
+    expect(handler).toHaveBeenCalled()
+    clientBus.stop()
+  })
+
+  it('should emit events to listeners that are subscribed', () => {
+    const clientBus = new ClientEventBus()
+    clientBus.start()
+    const handler = vi.fn()
+    window.addEventListener('test:event', handler)
+    const secondHandler = vi.fn()
+    window.addEventListener('test:event', secondHandler)
+
+    window.dispatchEvent(
+      new CustomEvent('tanstack-dispatch-event', {
+        detail: {
+          type: 'test:event',
+          payload: { foo: 'bar' },
+        },
+      }),
+    )
+    expect(handler).toHaveBeenCalled()
+    expect(secondHandler).toHaveBeenCalled()
+    clientBus.stop()
+  })
+
+  it('should emit events to global listeners when they are subscribed', () => {
+    const clientBus = new ClientEventBus()
+    clientBus.start()
+    const handler = vi.fn()
+    window.addEventListener('tanstack-devtools-global', handler)
+
+    window.dispatchEvent(
+      new CustomEvent('tanstack-dispatch-event', {
+        detail: {
+          type: 'test:event',
+          payload: { foo: 'bar' },
+        },
+      }),
+    )
+    expect(handler).toHaveBeenCalled()
+    clientBus.stop()
   })
 })