test: Add failing test for parser reader cleanup

Author: charmander

packages/pg-protocol/src/inbound-parser.test.ts

@@ -4,6 +4,7 @@ import { parse } from '.'
 import assert from 'assert'
 import { PassThrough } from 'stream'
 import { BackendMessage } from './messages'
+import { Parser } from './parser'
 
 const authOkBuffer = buffers.authenticationOk()
 const paramStatusBuffer = buffers.parameterStatus('client_encoding', 'UTF8')
@@ -565,4 +566,10 @@ describe('PgPacketStream', function () {
       })
     })
   })
+
+  it('cleans up the reader after handling a packet', function () {
+    const parser = new Parser()
+    parser.parse(oneFieldBuf, () => {})
+    assert.strictEqual((parser as any).reader.buffer.byteLength, 0)
+  })
 })