fix tests

Author: BeyondEvil

src/pytest_html/plugin.py

@@ -16,6 +16,8 @@
 from functools import lru_cache
 from html import escape
 from os.path import isfile
+from typing import Any
+from typing import Dict
 
 import pytest
 from _pytest.logging import _remove_ansi_escape_sequences
@@ -782,8 +784,15 @@ def __init__(self, config, data_file):
         self._data_file.parent.mkdir(parents=True, exist_ok=True)
 
     def _write(self):
+        try:
+            data = json.dumps(self._data)
+        except TypeError:
+            data = cleanup_unserializable(self._data)
+            data = json.dumps(data)
+
         with self._data_file.open("w", buffering=1, encoding="UTF-8") as f:
-            json.dump(self._data, f)
+            f.write("const jsonData = ")
+            f.write(data)
             f.write("\n")
 
     @pytest.hookimpl(trylast=True)
@@ -801,3 +810,15 @@ def pytest_runtest_logreport(self, report):
         )
         self._data["tests"].append(data)
         self._write()
+
+
+def cleanup_unserializable(d: Dict[str, Any]) -> Dict[str, Any]:
+    """Return new dict with entries that are not json serializable by their str()."""
+    result = {}
+    for k, v in d.items():
+        try:
+            json.dumps({k: v})
+        except TypeError:
+            v = str(v)
+        result[k] = v
+    return result