fix: handle cases where pytest itself fails (#70)

* Check if traceback location is not `None`

* Check if exception repr object is not null before retrieving message and lineno

* Remove `__future__.print_function` import

* Add test

* Match line using regex

plugin_test.py

@@ -34,6 +34,28 @@ def test_success():
     no_fnmatch_line(result, "::error file=test_annotation_succeed_no_output.py")
 
 
+def test_annotation_pytest_error(testdir):
+    testdir.makepyfile(
+        """
+        import pytest
+        pytest_plugins = 'pytest_github_actions_annotate_failures'
+
+        @pytest.fixture
+        def fixture():
+            return 1
+
+        def test_error():
+            assert fixture() == 1
+        """
+    )
+    testdir.monkeypatch.setenv("GITHUB_ACTIONS", "true")
+    result = testdir.runpytest_subprocess()
+
+    result.stderr.re_match_lines(
+        [r"::error file=test_annotation_pytest_error\.py,line=8::test_error.*",]
+    )
+
+
 def test_annotation_fail(testdir):
     testdir.makepyfile(
         """

pytest_github_actions_annotate_failures/plugin.py

@@ -1,12 +1,21 @@
 # -*- coding: utf-8 -*-
-from __future__ import print_function
+
+from __future__ import annotations
 
 import os
 import sys
 from collections import OrderedDict
+from typing import TYPE_CHECKING
+
+from _pytest._code.code import ExceptionRepr
 
 import pytest
 
+if TYPE_CHECKING:
+    from _pytest.nodes import Item
+    from _pytest.reports import CollectReport
+
+
 # Reference:
 # https://docs.pytest.org/en/latest/writing_plugins.html#hookwrapper-executing-around-other-hooks
 # https://docs.pytest.org/en/latest/writing_plugins.html#hook-function-ordering-call-example
@@ -17,10 +26,10 @@
 
 
 @pytest.hookimpl(tryfirst=True, hookwrapper=True)
-def pytest_runtest_makereport(item, call):
+def pytest_runtest_makereport(item: Item, call):
     # execute all other hooks to obtain the report object
     outcome = yield
-    report = outcome.get_result()
+    report: CollectReport = outcome.get_result()
 
     # enable only in a workflow of GitHub Actions
     # ref: https://help.github.com/en/actions/configuring-and-managing-workflows/using-environment-variables#default-environment-variables
@@ -57,13 +66,14 @@ def pytest_runtest_makereport(item, call):
         longrepr = report.head_line or item.name
 
         # get the error message and line number from the actual error
-        if hasattr(report.longrepr, "reprcrash"):
-            longrepr += "\n\n" + report.longrepr.reprcrash.message
-            traceback_entries = report.longrepr.reprtraceback.reprentries
-            if len(traceback_entries) > 1:
+        if isinstance(report.longrepr, ExceptionRepr):
+            if report.longrepr.reprcrash is not None:
+                longrepr += "\n\n" + report.longrepr.reprcrash.message
+            tb_entries = report.longrepr.reprtraceback.reprentries
+            if len(tb_entries) > 1 and tb_entries[0].reprfileloc is not None:
                 # Handle third-party exceptions
-                lineno = traceback_entries[0].reprfileloc.lineno
-            else:
+                lineno = tb_entries[0].reprfileloc.lineno
+            elif report.longrepr.reprcrash is not None:
                 lineno = report.longrepr.reprcrash.lineno
         elif isinstance(report.longrepr, tuple):
             _, lineno, message = report.longrepr