Initial backend for Next Gen

src/pytest_html/nextgen.py

@@ -0,0 +1,66 @@
+import json
+from typing import Any
+from typing import Dict
+
+import pytest
+
+
+class NextGenReport:
+    def __init__(self, config, data_file):
+        self._config = config
+        self._data_file = data_file
+
+        self._title = "Next Gen Report"
+        self._data = {
+            "title": self._title,
+            "collectedItems": 0,
+            "environment": {},
+            "tests": [],
+        }
+
+        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:
+            f.write("const jsonData = ")
+            f.write(data)
+            f.write("\n")
+
+    @pytest.hookimpl(trylast=True)
+    def pytest_sessionstart(self, session):
+        config = session.config
+        if hasattr(config, "_metadata") and config._metadata:
+            metadata = config._metadata
+            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(
+            config=self._config, report=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

src/pytest_html/plugin.py

@@ -19,12 +19,14 @@
 
 import pytest
 from _pytest.logging import _remove_ansi_escape_sequences
+from _pytest.pathlib import Path
 from py.xml import html
 from py.xml import raw
 
 from . import __pypi_url__
 from . import __version__
 from . import extras
+from . import nextgen
 
 
 @lru_cache()
@@ -101,7 +103,9 @@ def pytest_configure(config):
         if not hasattr(config, "workerinput"):
             # prevent opening htmlpath on worker nodes (xdist)
             config._html = HTMLReport(htmlpath, config)
+            config._next_gen = nextgen.NextGenReport(config, Path("nextgendata.js"))
             config.pluginmanager.register(config._html)
+            config.pluginmanager.register(config._next_gen)
 
 
 def pytest_unconfigure(config):
@@ -110,6 +114,11 @@ def pytest_unconfigure(config):
         del config._html
         config.pluginmanager.unregister(html)
 
+    next_gen = getattr(config, "_next_gen", None)
+    if next_gen:
+        del config._next_gen
+        config.pluginmanager.unregister(next_gen)
+
 
 @pytest.hookimpl(tryfirst=True, hookwrapper=True)
 def pytest_runtest_makereport(item, call):