feat(json-pack): 🎸 add Bencode encoding support for Set type

Author: streamich

src/json-pack/bencode/BencodeEncoder.ts

@@ -42,6 +42,8 @@ export class BencodeEncoder implements BinaryJsonEncoder {
             return this.writeBin(value as Uint8Array);
           case Map:
             return this.writeMap(value as Map<unknown, unknown>);
+          case Set:
+            return this.writeSet(value as Set<unknown>);
           default:
             return this.writeUnknown(value);
         }
@@ -155,4 +157,8 @@ export class BencodeEncoder implements BinaryJsonEncoder {
     }
     writer.u8(0x65); // 'e'
   }
+
+  public writeSet(set: Set<unknown>): void {
+    this.writeArr([...set.values()]);
+  }
 }

src/json-pack/bencode/__tests__/BencodeEncoder.spec.ts

@@ -134,6 +134,28 @@ describe('array', () => {
   });
 });
 
+describe('set', () => {
+  test('empty array', () => {
+    assertEncoder(new Set(), utf8`le`);
+  });
+
+  test('array with one integer element', () => {
+    assertEncoder(new Set([1]), utf8`li1ee`);
+  });
+
+  test('array with two integer elements', () => {
+    assertEncoder(new Set([1, 2]), utf8`li1ei2ee`);
+  });
+
+  test('array of array', () => {
+    assertEncoder(new Set([new Set([123])]), utf8`lli123eee`);
+  });
+
+  test('array of various types', () => {
+    assertEncoder(new Set([0, 1.32, 'str', new Set([1, 2, 3])]), utf8`li0ei1e3:strli1ei2ei3eee`);
+  });
+});
+
 describe('object', () => {
   test('empty object', () => {
     assertEncoder({}, utf8`de`);