feat(json-pack): 🎸 add array Bencode encoding

Author: streamich

src/json-pack/bencode/BencodeEncoder.ts

@@ -55,15 +55,15 @@ export class BencodeEncoder implements BinaryJsonEncoder {
   }
 
   public writeNull(): void {
-    throw new Error('Method not implemented.');
+    throw new Error('NULL_NOT_SUPPORTED');
   }
 
   public writeUndef(): void {
-    throw new Error('Method not implemented.');
+    throw new Error('UNDEF_NOT_SUPPORTED');
   }
 
   public writeBoolean(bool: boolean): void {
-    throw new Error('Method not implemented.');
+    throw new Error('BOOL_NOT_SUPPORTED');
   }
 
   public writeNumber(num: number): void {
@@ -120,7 +120,11 @@ export class BencodeEncoder implements BinaryJsonEncoder {
   }
 
   public writeArr(arr: unknown[]): void {
-    throw new Error('Method not implemented.');
+    const writer = this.writer;
+    writer.u8(0x6c); // 'l'
+    const length = arr.length;
+    for (let i = 0; i < length; i++) this.writeAny(arr[i]);
+    writer.u8(0x65); // 'e'
   }
 
   public writeObj(obj: Record<string, unknown>): void {

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

@@ -112,27 +112,27 @@ describe('binary', () => {
   });
 });
 
-// describe('array', () => {
-//   test('empty array', () => {
-//     assertEncoder([]);
-//   });
+describe('array', () => {
+  test('empty array', () => {
+    assertEncoder([], utf8`le`);
+  });
 
-//   test('array with one element', () => {
-//     assertEncoder([1]);
-//   });
+  test('array with one integer element', () => {
+    assertEncoder([1], utf8`li1ee`);
+  });
 
-//   test('array with two elements', () => {
-//     assertEncoder([1, 2]);
-//   });
+  test('array with two integer elements', () => {
+    assertEncoder([1, 2], utf8`li1ei2ee`);
+  });
 
-//   test('array of array', () => {
-//     assertEncoder([[123]]);
-//   });
+  test('array of array', () => {
+    assertEncoder([[123]], utf8`lli123eee`);
+  });
 
-//   test('array of various types', () => {
-//     assertEncoder([0, 1.32, 'str', true, false, null, [1, 2, 3]]);
-//   });
-// });
+  test('array of various types', () => {
+    assertEncoder([0, 1.32, 'str', [1, 2, 3]], utf8`li0ei1e3:strli1ei2ei3eee`);
+  });
+});
 
 // describe('object', () => {
 //   test('empty object', () => {