Use from_parent() constructor from pytest 5.4

.travis.yml

@@ -2,15 +2,17 @@ language: python
 
 jobs:
   include:
-    - env: TOXENV=py27
+    - env: TOXENV=py27-pytestlatest
       python: '2.7'
-    - env: TOXENV=py35
+    - env: TOXENV=py35-pytestlatest
       python: '3.5'
-    - env: TOXENV=py36
+    - env: TOXENV=py36-pytestlatest
       python: '3.6'
-    - env: TOXENV=py37
+    - env: TOXENV=py37-pytestlatest
       python: '3.7'
-    - env: TOXENV=py38
+    - env: TOXENV=py38-pytestlatest
+      python: '3.8'
+    - env: TOXENV=py38-pytest53
       python: '3.8'
     - stage: deploy
       python: '3.8'

CHANGELOG.md

@@ -1,3 +1,7 @@
+# 1.2.1
+
+- Remove `from_parent()` warnings in pytest 5.4.2+.
+
 # 1.2.0
 
 - `pytest-cpp` no longer supports Python 3.4.

pytest_cpp/plugin.py

@@ -13,6 +13,10 @@
 _ARGUMENTS = 'cpp_arguments'
 
 
+# pytest 5.4 introduced the 'from_parent' constructor
+needs_from_parent = hasattr(pytest.Item, "from_parent")
+
+
 def pytest_collect_file(parent, path):
     try:
         is_executable = os.stat(str(path)).st_mode & stat.S_IXUSR
@@ -38,7 +42,10 @@ def pytest_collect_file(parent, path):
             return
     for facade_class in FACADES:
         if facade_class.is_test_suite(str(path)):
-            return CppFile(path, parent, facade_class(), test_args)
+            if needs_from_parent:
+                return CppFile.from_parent(fspath=path, parent=parent, facade=facade_class(), arguments=test_args)
+            else:
+                return CppFile(path, parent, facade_class(), test_args)
 
 
 def pytest_addoption(parser):
@@ -57,22 +64,35 @@ def pytest_addoption(parser):
 
 
 class CppFile(pytest.File):
-    def __init__(self, path, parent, facade, arguments):
-        pytest.File.__init__(self, path, parent)
+    def __init__(self, fspath, parent, facade, arguments):
+        pytest.File.__init__(self, fspath, parent)
         self.facade = facade
         self._arguments = arguments
 
+    @classmethod
+    def from_parent(cls, parent, fspath, facade, arguments):
+        # TODO: after dropping python 2, change to keyword only after 'parent'
+        return super().from_parent(parent=parent, fspath=fspath, facade=facade, arguments=arguments)
+
     def collect(self):
         for test_id in self.facade.list_tests(str(self.fspath)):
-            yield CppItem(test_id, self, self.facade, self._arguments)
+            if needs_from_parent:
+                yield CppItem.from_parent(parent=self, name=test_id, facade=self.facade, arguments=self._arguments)
+            else:
+                yield CppItem(test_id, self, self.facade, self._arguments)
 
 
 class CppItem(pytest.Item):
-    def __init__(self, name, collector, facade, arguments):
-        pytest.Item.__init__(self, name, collector)
+    def __init__(self, name, parent, facade, arguments):
+        pytest.Item.__init__(self, name, parent)
         self.facade = facade
         self._arguments = arguments
 
+    @classmethod
+    def from_parent(cls, parent, name, facade, arguments):
+        # TODO: after dropping python 2, change to keyword only after 'parent'
+        return super().from_parent(name=name, parent=parent, facade=facade, arguments=arguments)
+
     def runtest(self):
         failures = self.facade.run_test(str(self.fspath),
                                         self.name,

setup.py

@@ -9,7 +9,10 @@
     entry_points={
         'pytest11': ['cpp = pytest_cpp.plugin'],
     },
-    install_requires=['pytest', 'colorama'],
+    install_requires=[
+        'pytest !=5.4.0, !=5.4.1',
+        'colorama',
+    ],
 
     # metadata for upload to PyPI
     author="Bruno Oliveira",

tox.ini

@@ -1,12 +1,13 @@
 [tox]
-envlist = py{27,35,36,37,38}
+envlist = py{27,35,36,37,38,38}-pytestlatest,py38-pytest53
 
 [testenv]
 deps=
-    pytest
+    pytestlatest: pytest
+    pytest53: pytest ~=5.3
     pytest-mock
     pytest-xdist
     coverage    
 commands=
     coverage run --source=pytest_cpp -m pytest tests
-    py.test -n8 tests
+    pytest -n8 tests