chore: import DH V2 D5.6.4 production baseline

api-v3/test/unit/inspection-closing-file.test.ts

@@ -0,0 +1,43 @@
+import assert from 'node:assert/strict';
+import test from 'node:test';
+import {
+  inspectInspectionSignatureFile,
+  MAX_INSPECTION_SIGNATURE_BYTES,
+} from '../../src/inspection-closing/inspection-signature-file';
+
+const png = Buffer.from([137, 80, 78, 71, 13, 10, 26, 10, 0, 0, 0, 0]);
+
+test('D5 signature accepts only PNG content and MIME', () => {
+  assert.deepEqual(inspectInspectionSignatureFile({
+    originalname: 'firma.png',
+    mimetype: 'image/png',
+    size: png.length,
+    buffer: png,
+  }), {
+    originalName: 'firma.png',
+    mimeType: 'image/png',
+    extension: '.png',
+  });
+  assert.throws(() => inspectInspectionSignatureFile({
+    originalname: 'firma.png',
+    mimetype: 'image/png',
+    size: 4,
+    buffer: Buffer.from('test'),
+  }));
+  assert.throws(() => inspectInspectionSignatureFile({
+    originalname: 'firma.png',
+    mimetype: 'application/octet-stream',
+    size: png.length,
+    buffer: png,
+  }));
+});
+
+test('D5 signature rejects empty and oversized files', () => {
+  assert.throws(() => inspectInspectionSignatureFile(undefined));
+  assert.throws(() => inspectInspectionSignatureFile({
+    originalname: 'firma.png',
+    mimetype: 'image/png',
+    size: MAX_INSPECTION_SIGNATURE_BYTES + 1,
+    buffer: Buffer.concat([png, Buffer.alloc(MAX_INSPECTION_SIGNATURE_BYTES)]),
+  }));
+});