added collected items

Author: BeyondEvil

src/pytest_html/plugin.py

@@ -777,6 +777,7 @@ def __init__(self, config, data_file):
         self._title = "Next Gen Report"
         self._data = {
             "title": self._title,
+            "collectedItems": 0,
             "environment": {},
             "tests": [],
         }
@@ -803,6 +804,11 @@ def pytest_sessionstart(self, session):
             self._data["environment"] = metadata
             self._write()
 
+    @pytest.hookimpl(trylast=True)
+    def pytest_collection_finish(self, session):
+        self._data["collectedItems"] = len(session.items)
+        self._write()
+
     @pytest.hookimpl(trylast=True)
     def pytest_runtest_logreport(self, report):
         data = self._config.hook.pytest_report_to_serializable(