add test for import pytest error

pythonFiles/tests/pytestadapter/.data/error_pytest_import.txt

@@ -0,0 +1,6 @@
+# Copyright (c) Microsoft Corporation. All rights reserved.
+# Licensed under the MIT License.
+
+@pytest.mark.parametrize("num", range(1, 89))
+def test_odd_even(num):
+    assert True

pythonFiles/tests/pytestadapter/test_discovery.py

@@ -10,6 +10,36 @@
 from .helpers import TEST_DATA_PATH, runner
 
 
+def test_import_error(tmp_path):
+    """Test pytest discovery on a file that has a pytest marker but does not import pytest.
+
+    Copies the contents of a .txt file to a .py file in the temporary directory
+    to then run pytest discovery on.
+
+    The json should still be returned but the errors list should be present.
+
+    Keyword arguments:
+    tmp_path -- pytest fixture that creates a temporary directory.
+    """
+    # Saving some files as .txt to avoid that file displaying a syntax error for
+    # the extension as a whole. Instead, rename it before running this test
+    # in order to test the error handling.
+    file_path = TEST_DATA_PATH / "error_pytest_import.txt"
+    temp_dir = tmp_path / "temp_data"
+    temp_dir.mkdir()
+    p = temp_dir / "error_pytest_import.py"
+    shutil.copyfile(file_path, p)
+    actual_list: Optional[List[Dict[str, Any]]] = runner(
+        ["--collect-only", os.fspath(p)]
+    )
+    assert actual_list
+    for actual in actual_list:
+        assert all(item in actual for item in ("status", "cwd", "error"))
+        assert actual["status"] == "error"
+        assert actual["cwd"] == os.fspath(TEST_DATA_PATH)
+        assert len(actual["error"]) == 2
+
+
 def test_syntax_error(tmp_path):
     """Test pytest discovery on a file that has a syntax error.
 

pythonFiles/vscode_pytest/__init__.py

@@ -79,7 +79,7 @@ def pytest_keyboard_interrupt(excinfo):
     Keyword arguments:
     excinfo -- the exception information of type ExceptionInfo.
     """
-    # The function execonly() returns the exception as a string.
+    # The function exconly() returns the exception as a string.
     ERRORS.append(excinfo.exconly())