feat: 🎸 support Buffer in JSON codec

Author: streamich

src/json/JsonEncoder.ts

@@ -40,6 +40,8 @@ export class JsonEncoder implements BinaryJsonEncoder, StreamingBinaryJsonEncode
           case Uint8Array:
             return this.writeBin(value as Uint8Array);
           default:
+            if (value instanceof Uint8Array) return this.writeBin(value);
+            if (Array.isArray(value)) return this.writeArr(value);
             return this.writeUnknown(value);
         }
       }

src/json/__tests__/buffer.spec.ts

@@ -0,0 +1,12 @@
+import {Writer} from '@jsonjoy.com/util/lib/buffers/Writer';
+import {JsonEncoder} from '../JsonEncoder';
+import {JsonDecoder} from '../JsonDecoder';
+
+test('supports Buffer', () => {
+  const encoder = new JsonEncoder(new Writer());
+  const buf = Buffer.from([1, 2, 3]);
+  const encoded = encoder.encode(buf);
+  const decoder = new JsonDecoder();
+  const decoded = decoder.decode(encoded);
+  expect(decoded).toStrictEqual(new Uint8Array([1, 2, 3]));
+});