Add test coverage for non-GET HTTP methods in NFs and EFs

[Copilot]

POST requests to Netlify Functions weren't working with @netlify/dev and the Vite plugin. The functionality was fixed but test coverage was missing for non-GET HTTP methods.

Changes

Added test coverage for POST, PUT, DELETE, and PATCH requests across key packages:

@netlify/functions-dev (4 tests)

• POST with JSON body
• PUT with path parameters and body
• DELETE with path parameters
• PATCH with JSON body

@netlify/dev (3 integration tests)

• POST to functions with JSON body
• PUT with path parameters
• DELETE with path parameters

@netlify/edge-functions-dev (4 tests, skipped)

• Tests for POST, PUT, DELETE, PATCH
• Skipped due to pre-existing Deno environment issues in test suite

@netlify/vite-plugin (3 tests)

• POST to functions
• PUT to functions
• POST to edge functions

Example

test('Handles POST requests with body', async () => {
  const fixture = new Fixture().withFile(
    'netlify/functions/echo.mjs',
    `export default async (req) => {
      const body = await req.text()
      return new Response(JSON.stringify({
        method: req.method,
        body: body
      }), {
        headers: { 'Content-Type': 'application/json' }
      })
    }`,
  )
  
  const req = new Request('https://site.netlify/.netlify/functions/echo', {
    method: 'POST',
    body: JSON.stringify({ message: 'Hello' }),
    headers: { 'Content-Type': 'application/json' },
  })
  
  const match = await functions.match(req, destPath)
  const res = await match!.handle(req)
  expect(res?.status).toBe(200)
  expect(await res?.json()).toEqual({
    method: 'POST',
    body: JSON.stringify({ message: 'Hello' }),
  })
})

Original prompt

Issue Title: Add test coverage for non-GET requests to NFs and EFs
Issue Description: POST requests to NFs weren't working with @netlify/dev and the Vite plugin. We fixed it but didn't add test coverage.
Fixes https://linear.app/netlify/issue/FRB-1879/add-test-coverage-for-non-get-requests-to-nfs-and-efs

Comment by User db2967f5-c49c-428b-ae14-6c61855027c1:
netlify/primitives

Comment by User c8ba5c18-8b2b-41c2-8484-9ca4ad793475:
📋 I wasn't able to determine which GitHub repository to work in.

Please tell me which repository this work should be done in using the format owner/repository-name (e.g., github/copilot), then I'll automatically start working on it!

Comment by User :
This thread is for an agent session with githubcopilot.

Comment by User e186620e-0ca5-4c3e-8da4-8665bb797a9b:
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Try again or contact Cursor support at hi@cursor.com.

Request ID: serverGenReqId_39cb84b5-454f-4685-b4f8-3b01e7b39a1c

Comment by User :
This thread is for an agent session with cursor.

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