Config Page

test/mpjpegParser.test.js

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+'use strict';
+
+const { MpjpegParser } = require('../src/cameraSwitch');
+
+// Baut ein FFmpeg-`-f mpjpeg`-Paket: Boundary + Header (Content-Length) + Body + CRLF.
+function packet(jpeg) {
+  return Buffer.concat([
+    Buffer.from(`--frame\r\nContent-Type: image/jpeg\r\nContent-Length: ${jpeg.length}\r\n\r\n`, 'latin1'),
+    jpeg,
+    Buffer.from('\r\n', 'latin1'),
+  ]);
+}
+
+describe('MpjpegParser', () => {
+  test('ein Frame', () => {
+    const frames = [];
+    const p = new MpjpegParser((f) => frames.push(f));
+    const jpeg = Buffer.from([0xFF, 0xD8, 1, 2, 3, 0xFF, 0xD9]);
+    p.push(packet(jpeg));
+    expect(frames).toHaveLength(1);
+    expect(frames[0].equals(jpeg)).toBe(true);
+  });
+
+  test('mehrere Frames in einem Chunk', () => {
+    const frames = [];
+    const p = new MpjpegParser((f) => frames.push(f));
+    const a = Buffer.from([0xFF, 0xD8, 1]);
+    const b = Buffer.from([0xFF, 0xD8, 2, 3, 4]);
+    p.push(Buffer.concat([packet(a), packet(b)]));
+    expect(frames).toHaveLength(2);
+    expect(frames[0].equals(a)).toBe(true);
+    expect(frames[1].equals(b)).toBe(true);
+  });
+
+  test('über Chunk-Grenze gesplittetes Frame', () => {
+    const frames = [];
+    const p = new MpjpegParser((f) => frames.push(f));
+    const jpeg = Buffer.from([10, 20, 30, 40, 50]);
+    const pkt = packet(jpeg);
+    p.push(pkt.subarray(0, 6));   // mitten im Header
+    expect(frames).toHaveLength(0);
+    p.push(pkt.subarray(6));      // Rest
+    expect(frames).toHaveLength(1);
+    expect(frames[0].equals(jpeg)).toBe(true);
+  });
+
+  test('Body über mehrere Chunks', () => {
+    const frames = [];
+    const p = new MpjpegParser((f) => frames.push(f));
+    const jpeg = Buffer.from([1, 2, 3, 4, 5, 6, 7, 8]);
+    const pkt = packet(jpeg);
+    const cut = pkt.length - 5; // mitten im Body trennen
+    p.push(pkt.subarray(0, cut));
+    expect(frames).toHaveLength(0);
+    p.push(pkt.subarray(cut));
+    expect(frames).toHaveLength(1);
+    expect(frames[0].equals(jpeg)).toBe(true);
+  });
+});