feat: added a test for snappy compression

Added a Snappy example in tests.

test/snappy.js

@@ -0,0 +1,13 @@
+const { Framer } = require('bedrock-protocol') // Import from bedrock-protocol
+
+const mockClient = {
+  batchHeader: 0xFE,
+  compressionAlgorithm: 'snappy',
+  compressionLevel: 6,
+  compressionThreshold: 10,
+  compressionHeader: 1,
+  features: { compressorInHeader: true },
+  compressionReady: true
+}
+
+module.exports = { mockClient }

test/snappy.test.js

@@ -0,0 +1,15 @@
+const { Framer } = require("bedrock-protocol/src/transforms/framer")
+const { mockClient } = require("./snappy")
+
+describe('Framer Snappy Compression', () => {
+    test('compress and decompress using Snappy via Framer', () => {
+        const framer = new Framer(mockClient)
+        const inputBuffer = Buffer.from('This is a test for Snappy compression')
+
+        const compressed = framer.compress(inputBuffer)
+        expect(compressed).not.toEqual(inputBuffer)
+
+        const decompressed = Framer.decompress(mockClient.compressionAlgorithm, compressed)
+        expect(decompressed.toString()).toEqual(inputBuffer.toString())
+    })
+})