Break up python APIv2 tests

* Tests broken up into areas of concern
* Introduced fixtures to reduce duplicated code
* Introduced new assert methods with APITestCase
* General cleanup of code while visiting
* Tests now targeting quay.io

Known issues:
* is-official against quay.io not working

Fixes: #9238
Signed-off-by: Jhon Honce <jhonce@redhat.com>

test/apiv2/python/rest_api/fixtures/api_testcase.py

@@ -0,0 +1,103 @@
+import json
+import subprocess
+import unittest
+
+import requests
+import sys
+import time
+
+from .podman import Podman
+
+
+class APITestCase(unittest.TestCase):
+    PODMAN_URL = "http://localhost:8080"
+    podman = None  # initialized podman configuration for tests
+    service = None  # podman service instance
+
+    @classmethod
+    def setUpClass(cls):
+        super().setUpClass()
+
+        APITestCase.podman = Podman()
+        APITestCase.service = APITestCase.podman.open(
+            "system", "service", "tcp:localhost:8080", "--time=0"
+        )
+        # give the service some time to be ready...
+        time.sleep(2)
+
+        returncode = APITestCase.service.poll()
+        if returncode is not None:
+            raise subprocess.CalledProcessError(returncode, "podman system service")
+
+        r = requests.post(
+            APITestCase.uri("/images/pull?reference=quay.io%2Flibpod%2Falpine%3Alatest")
+        )
+        if r.status_code != 200:
+            raise subprocess.CalledProcessError(
+                r.status_code, f"podman images pull quay.io/libpod/alpine:latest {r.text}"
+            )
+
+    @classmethod
+    def tearDownClass(cls):
+        APITestCase.service.terminate()
+        stdout, stderr = APITestCase.service.communicate(timeout=0.5)
+        if stdout:
+            sys.stdout.write("\nService Stdout:\n" + stdout.decode("utf-8"))
+        if stderr:
+            sys.stderr.write("\nService Stderr:\n" + stderr.decode("utf-8"))
+        return super().tearDownClass()
+
+    def setUp(self):
+        super().setUp()
+        APITestCase.podman.run("run", "alpine", "/bin/ls", check=True)
+
+    def tearDown(self) -> None:
+        APITestCase.podman.run("pod", "rm", "--all", "--force", check=True)
+        APITestCase.podman.run("rm", "--all", "--force", check=True)
+        super().tearDown()
+
+    @property
+    def podman_url(self):
+        return "http://localhost:8080"
+
+    @staticmethod
+    def uri(path):
+        return APITestCase.PODMAN_URL + "/v2.0.0/libpod" + path
+
+    def resolve_container(self, path):
+        """Find 'first' container and return 'Id' formatted into given URI path."""
+
+        try:
+            r = requests.get(self.uri("/containers/json?all=true"))
+            containers = r.json()
+        except Exception as e:
+            msg = f"Bad container response: {e}"
+            if r is not None:
+                msg += ": " + r.text
+            raise self.failureException(msg)
+        return path.format(containers[0]["Id"])
+
+    def assertContainerExists(self, member, msg=None):  # pylint: disable=invalid-name
+        r = requests.get(self.uri(f"/containers/{member}/exists"))
+        if r.status_code == 404:
+            if msg is None:
+                msg = f"Container '{member}' does not exist."
+            self.failureException(msg)
+
+    def assertContainerNotExists(self, member, msg=None):  # pylint: disable=invalid-name
+        r = requests.get(self.uri(f"/containers/{member}/exists"))
+        if r.status_code == 204:
+            if msg is None:
+                msg = f"Container '{member}' exists."
+            self.failureException(msg)
+
+    def assertId(self, content):  # pylint: disable=invalid-name
+        objects = json.loads(content)
+        try:
+            if isinstance(objects, dict):
+                _ = objects["Id"]
+            else:
+                for item in objects:
+                    _ = item["Id"]
+        except KeyError:
+            self.failureException("Failed in find 'Id' in return value.")