Fix PyTest plugin when xdist is not installed

The pytest_configure_node() hook is only allowed when xdist
is installed. This also updates the tests to run with and
without xdist.

.github/workflows/ci.yaml

@@ -74,11 +74,17 @@ jobs:
           - "3.11"
         tox_env:
           - pytest62
+          - pytest62-xdist
           - pytest70
+          - pytest70-xdist
           - pytest71
+          - pytest71-xdist
           - pytest72
+          - pytest72-xdist
           - pytest73
+          - pytest73-xdist
           - pytest74
+          - pytest74-xdist
 
     steps:
       - uses: actions/checkout@v3

setup.cfg

@@ -47,7 +47,6 @@ dev =
     flake8-quotes
     mypy
     py>=1.9.0
-    pytest-xdist>=2.0.0
     requests-mock[fixture]
     types-requests
     types-setuptools

src/pytest_unflakable/__init__.py

@@ -5,13 +5,16 @@
 import argparse
 
 import os
+import pprint
+import sys
 from typing import TYPE_CHECKING
 
 import pytest
 import logging
 
+from ._api import get_test_suite_manifest
 from ._git import get_current_git_commit, get_current_git_branch
-from ._plugin import UnflakablePlugin, QuarantineMode
+from ._plugin import UnflakablePlugin, QuarantineMode, UnflakableXdistHooks
 
 if TYPE_CHECKING:
     Config = pytest.Config
@@ -130,7 +133,7 @@ def pytest_configure(config: Config) -> None:
     if config.getoption('unflakable_suite_id') is None:
         raise pytest.UsageError('missing required argument --test-suite-id')
 
-    # pytest-xdist workers don't make API calls and amy not have the API key available.
+    # pytest-xdist workers don't make API calls and may not have the API key available.
     if is_xdist_worker:
         api_key = ''
     elif config.option.unflakable_api_key_path is not None:
@@ -143,6 +146,7 @@ def pytest_configure(config: Config) -> None:
 
     branch = config.option.unflakable_branch
     commit = config.option.unflakable_commit
+    test_suite_id = config.option.unflakable_suite_id
     git_auto_detect = not config.getoption('unflakable_no_git_auto_detect', False)
     if git_auto_detect and not is_xdist_worker:
         if commit is None:
@@ -153,24 +157,47 @@ def pytest_configure(config: Config) -> None:
             branch = get_current_git_branch(commit, logger)
             logger.debug('auto-detected branch `%s`', branch)
 
+    insecure_disable_tls_validation = config.getoption(
+        'unflakable_insecure_disable_tls_validation', False)
+    manifest = None
     if is_xdist_worker and 'unflakable_manifest' in config.workerinput:  # type: ignore
-        worker_manifest = config.workerinput['unflakable_manifest']  # type: ignore
+        manifest = config.workerinput['unflakable_manifest']  # type: ignore
+        logger.debug(
+            f'xdist worker received manifest for test suite {test_suite_id}: '
+            f'{pprint.pformat(manifest)}'
+        )
     else:
-        worker_manifest = None
+        try:
+            manifest = get_test_suite_manifest(
+                test_suite_id=test_suite_id,
+                api_key=api_key,
+                base_url=config.option.unflakable_base_url,
+                insecure_disable_tls_validation=insecure_disable_tls_validation,
+                logger=logger,
+            )
+        # IOError is the base class for `requests.RequestException`.
+        except IOError as e:
+            sys.stderr.write(
+                ('ERROR: Failed to get Unflakable manifest: %s\nTest failures will NOT be'
+                 ' quarantined.\n') % (repr(e))),
+
+    if config.pluginmanager.hasplugin('xdist'):
+        config.pluginmanager.register(
+            UnflakableXdistHooks(logger=logger, worker_manifest=manifest)
+        )
 
     config.pluginmanager.register(UnflakablePlugin(
         api_key=api_key,
         base_url=config.option.unflakable_base_url,
         branch=branch,
         commit=commit,
         failure_retries=config.option.unflakable_failure_retries,
-        insecure_disable_tls_validation=config.getoption(
-            'unflakable_insecure_disable_tls_validation', False),
+        insecure_disable_tls_validation=insecure_disable_tls_validation,
         quarantine_mode=quarantine_mode,
-        test_suite_id=config.option.unflakable_suite_id,
+        test_suite_id=test_suite_id,
         upload_results=not is_xdist_worker and (
             not config.getoption('unflakable_no_upload_results', False)),
         logger=logger,
-        worker_manifest=worker_manifest,
+        manifest=manifest,
         is_xdist_worker=is_xdist_worker,
     ))

src/pytest_unflakable/_plugin.py

@@ -8,16 +8,13 @@
 )
 
 import logging
-import pprint
 
 import pytest
 import _pytest
-import sys
 from time import time
 from datetime import datetime, timezone
 
 from ._api import (
-    get_test_suite_manifest,
     create_test_suite_run,
     build_test_suite_run_url,
     CreateTestSuiteRunRequest,
@@ -152,6 +149,30 @@ def count_towards_summary(self) -> bool:
 ItemReports = Dict[CallPhase, UnflakableReport]
 
 
+class UnflakableXdistHooks:
+    logger: logging.Logger
+
+    def __init__(
+            self,
+            logger: logging.Logger,
+            worker_manifest: Optional[TestSuiteManifest],
+    ):
+        self.logger = logger
+        self.manifest = worker_manifest
+
+    # This is a `xdist.workermanage.WorkerController`, but pytest-xdist doesn't provide types.
+    def pytest_configure_node(self, node: Any) -> None:
+        """
+        Hook called by pytest-xdist to configure each worker node.
+
+        We leverage this hook to send the manifest to the worker.
+        """
+        nodeid = node.workerinput['workerid']
+        self.logger.debug(f'called hook pytest_configure_node: {nodeid}')
+        if self.manifest is not None:
+            node.workerinput['unflakable_manifest'] = self.manifest
+
+
 class UnflakablePlugin:
     api_key: str
     base_url: Optional[str]
@@ -186,7 +207,7 @@ def __init__(
             test_suite_id: str,
             upload_results: bool,
             logger: logging.Logger,
-            worker_manifest: Optional[TestSuiteManifest],
+            manifest: Optional[TestSuiteManifest],
             is_xdist_worker: bool,
     ):
         self.api_key = api_key
@@ -203,26 +224,7 @@ def __init__(
         self.is_xdist_worker = is_xdist_worker
         self.item_reports = {}
 
-        self.manifest = worker_manifest
-        if self.manifest is None:
-            try:
-                self.manifest = get_test_suite_manifest(
-                    test_suite_id=self.test_suite_id,
-                    api_key=self.api_key,
-                    base_url=self.base_url,
-                    insecure_disable_tls_validation=self.insecure_disable_tls_validation,
-                    logger=self.logger,
-                )
-            # IOError is the base class for `requests.RequestException`.
-            except IOError as e:
-                sys.stderr.write(
-                    ('ERROR: Failed to get Unflakable manifest: %s\nTest failures will NOT be'
-                     ' quarantined.\n') % (repr(e))),
-        else:
-            logger.debug(
-                f'xdist worker received manifest for test suite {self.test_suite_id}: '
-                f'{pprint.pformat(self.manifest)}'
-            )
+        self.manifest = manifest
 
         self.quarantined_tests = set([
             (quarantined_test['filename'], tuple(quarantined_test['name'])) for
@@ -495,18 +497,6 @@ def pytest_sessionstart(self, session: pytest.Session) -> None:
         self.session = session
         self.start_time = time()
 
-    # This is a `xdist.workermanage.WorkerController`, but pytest-xdist doesn't provide types.
-    def pytest_configure_node(self, node: Any) -> None:
-        """
-        Hook called by pytest-xdist to configure each worker node.
-
-        We leverage this hook to send the manifest to the worker.
-        """
-        nodeid = node.workerinput['workerid']
-        self.logger.debug(f'called hook pytest_configure_node: {nodeid}')
-        if self.manifest is not None:
-            node.workerinput['unflakable_manifest'] = self.manifest
-
     def _build_test_suite_run_request(
             self,
             session: pytest.Session,