### Deno Unit Test Example for Supabase Edge Functions
Source: https://github.com/supabase/supabase/blob/master/apps/docs/content/guides/functions/unit-test.mdx
This TypeScript example demonstrates a unit test for Supabase Edge Functions using Deno. It shows how to initialize a Supabase client with environment variables, test client creation and database connectivity, and invoke an Edge Function to assert its response.
```typescript
import { assert, assertEquals } from 'jsr:@std/assert@1'
import { createClient, SupabaseClient } from 'npm:@supabase/supabase-js@2'
import 'jsr:@std/dotenv/load'
const supabaseUrl = Deno.env.get('SUPABASE_URL') ?? ''
const supabaseKey = Deno.env.get('SUPABASE_PUBLISHABLE_KEY') ?? ''
const options = {
auth: {
autoRefreshToken: false,
persistSession: false,
detectSessionInUrl: false,
},
}
const testClientCreation = async () => {
var client: SupabaseClient = createClient(supabaseUrl, supabaseKey, options)
if (!supabaseUrl) throw new Error('supabaseUrl is required.')
if (!supabaseKey) throw new Error('supabaseKey is required.')
const { data: table_data, error: table_error } = await client.from('my_table').select('*').limit(1)
if (table_error) throw new Error('Invalid Supabase client: ' + table_error.message)
assert(table_data, 'Data should be returned from the query.')
}
const testHelloWorld = async () => {
var client: SupabaseClient = createClient(supabaseUrl, supabaseKey, options)
const { data: func_data, error: func_error } = await client.functions.invoke('hello-world', { body: { name: 'bar' } })
if (func_error) throw new Error('Invalid response: ' + func_error.message)
console.log(JSON.stringify(func_data, null, 2))
assertEquals(func_data.message, 'Hello bar!')
}
Deno.test('Client Creation Test', testClientCreation)
Deno.test('Hello-world Function Test', testHelloWorld)
```
### Connect to Supabase Postgres with supabase-js in Deno Edge Function
Source: https://github.com/supabase/supabase/blob/master/apps/docs/content/guides/functions/connect-to-postgres.mdx
```typescript
import { createClient } from 'npm:@supabase/supabase-js@2'
Deno.serve(async (req) => {
try {
const supabase = createClient(
Deno.env.get('SUPABASE_URL') ?? '',
Deno.env.get('SUPABASE_PUBLISHABLE_KEY') ?? '',
{ global: { headers: { Authorization: req.headers.get('Authorization')! } } }
)
const { data, error } = await supabase.from('countries').select('*')
if (error) throw error
return new Response(JSON.stringify({ data }), { headers: { 'Content-Type': 'application/json' }, status: 200 })
} catch (err) {
return new Response(String(err?.message ?? err), { status: 500 })
}
})
```
### Initialize Supabase Client with Auth Context in Deno Edge Function
Source: https://github.com/supabase/supabase/blob/master/apps/docs/content/guides/functions/auth-legacy-jwt.mdx
```typescript
import { createClient } from 'npm:@supabase/supabase-js@2'
Deno.serve(async (req: Request) => {
const supabaseClient = createClient(
Deno.env.get('SUPABASE_URL') ?? '',
Deno.env.get('SUPABASE_ANON_KEY') ?? '',
{ global: { headers: { Authorization: req.headers.get('Authorization')! } } }
);
})
```
### Invoke Live Supabase Edge Function
Source: https://github.com/supabase/supabase/blob/master/apps/docs/content/guides/functions/deploy.mdx
```bash
curl --request POST 'https://<project_id>.supabase.co/functions/v1/hello-world' \
--header 'Authorization: Bearer ANON_KEY' \
--header 'Content-Type: application/json' \
--data '{ "name":"Functions" }'
```
```js
const { data, error } = await supabase.functions.invoke('hello-world', {
body: { name: 'Functions' },
})
```
### Supabase Edge Functions - Serverless Drivers
Supabase Edge Functions use the Deno runtime which has native support for TCP connections, providing flexibility in choosing your database client. You can use supabase-js, Deno Postgres driver, Postgres.js, or Drizzle ORM.
