Step 5 implemented

tests/ui/test_upload_page.py

@@ -0,0 +1,53 @@
+"""Tests for transcription.ui.upload_page."""
+
+from pathlib import Path
+from uuid import uuid4
+
+import pytest
+
+from transcription.services.upload import UploadError, UploadJobResult
+from transcription.ui import upload_page
+
+
+@pytest.mark.unit
+class TestUploadPageBehavior:
+    """Verify upload page helper and submission behavior."""
+
+    def test_accepted_upload_types_contains_supported_extensions(self):
+        """accepted_upload_types includes all MVP-supported upload extensions."""
+        accepted = upload_page.accepted_upload_types()
+        assert ".jpg" in accepted
+        assert ".jpeg" in accepted
+        assert ".png" in accepted
+        assert ".tif" in accepted
+        assert ".tiff" in accepted
+        assert ".pdf" in accepted
+
+    def test_submit_upload_calls_upload_service(self, monkeypatch):
+        """submit_upload delegates file persistence and job creation to upload service."""
+        expected = UploadJobResult(
+            document_id=uuid4(),
+            job_id=uuid4(),
+            stored_path=Path("uploads/mock.jpg"),
+            original_filename="mock.jpg",
+        )
+
+        def fake_create_upload_job(*, filename: str, file_bytes: bytes):
+            assert filename == "mock.jpg"
+            assert file_bytes == b"bytes"
+            return expected
+
+        monkeypatch.setattr(upload_page, "create_upload_job", fake_create_upload_job)
+
+        result = upload_page.submit_upload(filename="mock.jpg", file_bytes=b"bytes")
+        assert result == expected
+
+    def test_submit_upload_surfaces_upload_error(self, monkeypatch):
+        """submit_upload raises UploadError for invalid upload payloads."""
+        def fake_create_upload_job(*, filename: str, file_bytes: bytes):
+            raise UploadError("invalid payload")
+
+        monkeypatch.setattr(upload_page, "create_upload_job", fake_create_upload_job)
+
+        with pytest.raises(UploadError):
+            upload_page.submit_upload(filename="bad.jpg", file_bytes=b"")