Add HTML5 authoring diff preview

services/api-server/tests/test_api.py

@@ -115,6 +115,8 @@ def test_html5_server_rendered_project_editor(tmp_path: Path):
     assert "data-html5-authoring-preview" in editor.text
     assert "data-html5-authoring-preview-form" in editor.text
     assert f'hx-post="/html5/projects/{project_id}/authoring/completion-preview"' in editor.text
+    assert "data-html5-authoring-diff-form" in editor.text
+    assert f'hx-post="/html5/projects/{project_id}/authoring/semantic-diff-preview"' in editor.text
     assert "data-html5-authoring-changes" in editor.text
     assert f'hx-get="/html5/projects/{project_id}/authoring/changes"' in editor.text
     assert 'hx-get="/html5/projects/' in editor.text
@@ -2296,6 +2298,30 @@ def test_authoring_context_and_completion_preview(tmp_path: Path):
     assert "ADD" in html5_preview.text
     assert "<html" not in html5_preview.text
 
+    html5_diff_preview = client.post(
+        f"/html5/projects/{project_id}/authoring/semantic-diff-preview",
+        data={
+            "routine_name": "Проведение",
+            "source_path": str(module),
+            "original_text": source_text,
+            "proposed_text": source_text.replace(
+                "    Сумма = 0;",
+                "    Сумма = 0;\n    Если Отказ Тогда\n        Возврат;\n    КонецЕсли;",
+            ),
+            "task_id": "task.authoring",
+            "session_id": "session.authoring",
+            "user_id": "dev.ivan",
+        },
+    )
+    assert html5_diff_preview.status_code == 200
+    assert "text/html" in html5_diff_preview.headers["content-type"]
+    assert "data-html5-authoring-diff-result" in html5_diff_preview.text
+    assert "Diff preview" in html5_diff_preview.text
+    assert "Если Отказ Тогда" in html5_diff_preview.text
+    assert "task-session" in html5_diff_preview.text
+    assert "BLOCKED" in html5_diff_preview.text
+    assert "<html" not in html5_diff_preview.text
+
     diff_preview = client.post(
         f"/projects/{project_id}/authoring/semantic-diff-preview",
         json={