test(plugins/resend): add Vitest unit test suite for ResendPlugin

plugins/resend/index.test.ts

@@ -0,0 +1,107 @@
+import { describe, it, expect, vi, beforeEach } from 'vitest'
+import { ResendPlugin } from './index'
+
+describe('ResendPlugin - Initialization', () => {
+    it('should initialize with correct plugin name and options', () => {
+        const plugin = new ResendPlugin({ apiKey: 're_test_123' })
+        expect(plugin).toBeInstanceOf(ResendPlugin)
+        expect(plugin.name).toBe('starbasedb:resend')
+        expect(plugin.apiKey).toBe('re_test_123')
+        expect(plugin.options?.requiresAuth).toBe(false)
+    })
+
+    it('should initialize without options and have undefined apiKey', () => {
+        const plugin = new ResendPlugin()
+        expect(plugin).toBeInstanceOf(ResendPlugin)
+        expect(plugin.apiKey).toBeUndefined()
+        expect(plugin.options?.requiresAuth).toBe(false)
+    })
+})
+
+describe('ResendPlugin - sendEmail()', () => {
+    const mockApiKey = 're_test_secret_key'
+    let plugin: ResendPlugin
+
+    beforeEach(() => {
+        vi.clearAllMocks()
+        plugin = new ResendPlugin({ apiKey: mockApiKey })
+    })
+
+    it('should send email successfully with correct headers and payload', async () => {
+        const mockSuccessResponse = {
+            id: 're_msg_123456789',
+        }
+
+        const fetchSpy = vi.fn().mockResolvedValue({
+            ok: true,
+            status: 200,
+            json: vi.fn().mockResolvedValue(mockSuccessResponse),
+        })
+        vi.stubGlobal('fetch', fetchSpy)
+
+        const from = 'onboarding@resend.dev'
+        const to = ['user@example.com', 'admin@example.com']
+        const subject = 'Welcome to Starbase'
+        const html = '<p>Hello StarbaseDB!</p>'
+
+        const result = await plugin.sendEmail(from, to, subject, html)
+
+        expect(fetchSpy).toHaveBeenCalledTimes(1)
+        expect(fetchSpy).toHaveBeenCalledWith('https://api.resend.com/emails', {
+            method: 'POST',
+            headers: {
+                Authorization: `Bearer ${mockApiKey}`,
+                'Content-Type': 'application/json',
+            },
+            body: JSON.stringify({
+                from,
+                to,
+                subject,
+                html,
+            }),
+        })
+
+        expect(result).toEqual(mockSuccessResponse)
+    })
+
+    it('should throw an error with API message when response is not ok', async () => {
+        const mockErrorResponse = {
+            message: 'Invalid API key provided',
+            statusCode: 401,
+        }
+
+        const fetchSpy = vi.fn().mockResolvedValue({
+            ok: false,
+            status: 401,
+            json: vi.fn().mockResolvedValue(mockErrorResponse),
+        })
+        vi.stubGlobal('fetch', fetchSpy)
+
+        await expect(
+            plugin.sendEmail(
+                'from@test.com',
+                ['to@test.com'],
+                'Test Subject',
+                '<p>Test</p>'
+            )
+        ).rejects.toThrow('Invalid API key provided')
+    })
+
+    it('should throw fallback error message when response is not ok and no message is returned', async () => {
+        const fetchSpy = vi.fn().mockResolvedValue({
+            ok: false,
+            status: 500,
+            json: vi.fn().mockResolvedValue({}),
+        })
+        vi.stubGlobal('fetch', fetchSpy)
+
+        await expect(
+            plugin.sendEmail(
+                'from@test.com',
+                ['to@test.com'],
+                'Test Subject',
+                '<p>Test</p>'
+            )
+        ).rejects.toThrow('Failed to send email')
+    })
+})