Refactor python tests to run against python3.9

* Introduce sub-package compat to meet packaging and import requirements
* Update documenation for running tests
* Add requirements.txt to improve IDE support

Signed-off-by: Jhon Honce <jhonce@redhat.com>

test/python/docker/__init__.py

@@ -8,7 +8,7 @@ import tempfile
 
 from docker import DockerClient
 
-from test.python.docker import constant
+from .compat import constant
 
 
 class Podman(object):
@@ -39,7 +39,9 @@ class Podman(object):
         self.cmd.append("--root=" + os.path.join(self.anchor_directory, "crio"))
         self.cmd.append("--runroot=" + os.path.join(self.anchor_directory, "crio-run"))
 
-        os.environ["REGISTRIES_CONFIG_PATH"] = os.path.join(self.anchor_directory, "registry.conf")
+        os.environ["REGISTRIES_CONFIG_PATH"] = os.path.join(
+            self.anchor_directory, "registry.conf"
+        )
         p = configparser.ConfigParser()
         p.read_dict(
             {
@@ -51,10 +53,14 @@ class Podman(object):
         with open(os.environ["REGISTRIES_CONFIG_PATH"], "w") as w:
             p.write(w)
 
-        os.environ["CNI_CONFIG_PATH"] = os.path.join(self.anchor_directory, "cni", "net.d")
+        os.environ["CNI_CONFIG_PATH"] = os.path.join(
+            self.anchor_directory, "cni", "net.d"
+        )
         os.makedirs(os.environ["CNI_CONFIG_PATH"], exist_ok=True)
         self.cmd.append("--cni-config-dir=" + os.environ["CNI_CONFIG_PATH"])
-        cni_cfg = os.path.join(os.environ["CNI_CONFIG_PATH"], "87-podman-bridge.conflist")
+        cni_cfg = os.path.join(
+            os.environ["CNI_CONFIG_PATH"], "87-podman-bridge.conflist"
+        )
         # json decoded and encoded to ensure legal json
         buf = json.loads(
             """

test/python/docker/compat/README.md

@@ -13,26 +13,26 @@ To run the tests locally in your sandbox (Fedora 32,33):
 
 ### Run the entire test suite
 
+All commands are run from the root of the repository.
+
 ```shell
-# python3 -m unittest discover test/python/docker
+# python3 -m unittest discover -s test/python/docker
 ```
 
 Passing the -v option to your test script will instruct unittest.main() to enable a higher level of verbosity, and produce detailed output:
 
 ```shell
-# python3 -m unittest -v discover test/python/docker
+# python3 -m unittest -v discover -s test/python/docker
 ```
 
 ### Run a specific test class
 
 ```shell
-# cd test/python/docker
-# python3 -m unittest -v tests.test_images
+# python3 -m unittest -v test.python.docker.compat.test_images.TestImages
 ```
 
 ### Run a specific test within the test class
 
 ```shell
-# cd test/python/docker
-# python3 -m unittest tests.test_images.TestImages.test_import_image
+# python3 -m unittest test.python.docker.compat.test_images.TestImages.test_tag_valid_image
 ```

test/python/docker/compat/common.py

@@ -1,10 +1,12 @@
 from docker import DockerClient
 
-from test.python.docker import constant
+from test.python.docker.compat import constant
 
 
 def run_top_container(client: DockerClient):
-    c = client.containers.create(constant.ALPINE, command="top", detach=True, tty=True, name="top")
+    c = client.containers.create(
+        constant.ALPINE, command="top", detach=True, tty=True, name="top"
+    )
     c.start()
     return c.id
 

test/python/docker/compat/test_containers.py

@@ -5,7 +5,8 @@ import unittest
 
 from docker import DockerClient, errors
 
-from test.python.docker import Podman, common, constant
+from test.python.docker import Podman
+from test.python.docker.compat import common, constant
 
 
 class TestContainers(unittest.TestCase):
@@ -87,9 +88,11 @@ class TestContainers(unittest.TestCase):
         self.assertEqual(len(containers), 2)
 
     def test_start_container_with_random_port_bind(self):
-        container = self.client.containers.create(image=constant.ALPINE,
-                                                  name="containerWithRandomBind",
-                                                  ports={'1234/tcp': None})
+        container = self.client.containers.create(
+            image=constant.ALPINE,
+            name="containerWithRandomBind",
+            ports={"1234/tcp": None},
+        )
         containers = self.client.containers.list(all=True)
         self.assertTrue(container in containers)
 

test/python/docker/compat/test_images.py

@@ -7,7 +7,8 @@ import unittest
 
 from docker import DockerClient, errors
 
-from test.python.docker import Podman, common, constant
+from test.python.docker import Podman
+from test.python.docker.compat import common, constant
 
 
 class TestImages(unittest.TestCase):
@@ -78,7 +79,9 @@ class TestImages(unittest.TestCase):
         self.assertEqual(len(self.client.images.list()), 2)
 
         # List images with filter
-        self.assertEqual(len(self.client.images.list(filters={"reference": "alpine"})), 1)
+        self.assertEqual(
+            len(self.client.images.list(filters={"reference": "alpine"})), 1
+        )
 
     def test_search_image(self):
         """Search for image"""
@@ -91,7 +94,7 @@ class TestImages(unittest.TestCase):
             r = self.client.images.search("bogus/bogus")
         except:
             return
-        self.assertTrue(len(r)==0)
+        self.assertTrue(len(r) == 0)
 
     def test_remove_image(self):
         """Remove image"""

test/python/docker/compat/test_system.py

@@ -5,7 +5,8 @@ import unittest
 
 from docker import DockerClient
 
-from test.python.docker import Podman, common, constant
+from test.python.docker import Podman, constant
+from test.python.docker.compat import common
 
 
 class TestSystem(unittest.TestCase):

test/python/requirements.txt

@@ -0,0 +1,6 @@
+docker~=4.4.3
+
+requests~=2.20.0
+setuptools~=50.3.2
+python-dateutil~=2.8.1
+PyYAML~=5.4.1