Поставил HTML по дефолту

tests/test_trace_endpoint.py

@@ -46,7 +46,7 @@ def _build_client(trace_provider=None) -> TestClient:
     return TestClient(app)
 
 
-def test_trace_endpoint_returns_text_with_default_levels() -> None:
+def test_trace_endpoint_returns_html_by_default() -> None:
     captured: list[tuple[str, TraceQueryRequest]] = []
 
     async def trace_provider(trace_id: str, request: TraceQueryRequest) -> TraceLogView:
@@ -67,6 +67,32 @@ def test_trace_endpoint_returns_text_with_default_levels() -> None:
     finally:
         client.close()
 
+    assert response.status_code == 200
+    assert response.headers["content-type"].startswith("text/html")
+    assert "trace_id:" in response.text
+    assert "first error" in response.text
+    assert "second warning" in response.text
+    assert captured == [("trace-1", TraceQueryRequest(levels=("ERROR", "WARNING", "INFO"), include_attrs_json=False, response_format="html"))]
+
+
+def test_trace_endpoint_returns_text_when_requested() -> None:
+    async def trace_provider(_trace_id: str, _request: TraceQueryRequest) -> TraceLogView:
+        return TraceLogView(
+            trace_id="trace-1",
+            parent_id="root-trace",
+            child_ids=("child-1", "child-2"),
+            records=(
+                _trace_record(row_id=1, level="ERROR", message="first error"),
+                _trace_record(row_id=2, level="WARNING", message="second warning"),
+            ),
+        )
+
+    client = _build_client(trace_provider)
+    try:
+        response = client.get("/traces/trace-1?format=text")
+    finally:
+        client.close()
+
     assert response.status_code == 200
     assert response.text == (
         "trace_id: trace-1\n"
@@ -79,7 +105,6 @@ def test_trace_endpoint_returns_text_with_default_levels() -> None:
         "first error\n"
         "second warning"
     )
-    assert captured == [("trace-1", TraceQueryRequest(levels=("ERROR", "WARNING", "INFO"), include_attrs_json=False, response_format="text"))]
 
 
 def test_trace_endpoint_appends_attrs_json_in_text_mode() -> None:
@@ -95,7 +120,7 @@ def test_trace_endpoint_appends_attrs_json_in_text_mode() -> None:
 
     client = _build_client(trace_provider)
     try:
-        response = client.get("/traces/trace-1?attrs_json=true")
+        response = client.get("/traces/trace-1?format=text&attrs_json=true")
     finally:
         client.close()
 
@@ -125,7 +150,7 @@ def test_trace_endpoint_separates_messages_by_step_in_text_mode() -> None:
 
     client = _build_client(trace_provider)
     try:
-        response = client.get("/traces/trace-1")
+        response = client.get("/traces/trace-1?format=text")
     finally:
         client.close()