Add nginx-ex tests executed on OpenShift 4

Signed-off-by: Petr "Stone" Hracek <phracek@redhat.com>

Makefile

@@ -0,0 +1,3 @@
+.PHONY: test-openshift-4
+test-openshift-4:
+	cd tests && PYTHONPATH=$(CURDIR) python3 -m pytest --verbose --color=yes --showlocals .

tests/test_nginx.py

@@ -0,0 +1,50 @@
+import os
+
+import pytest
+from pathlib import Path
+
+from container_ci_suite.openshift import OpenShiftAPI
+
+test_dir = Path(os.path.abspath(os.path.dirname(__file__)))
+
+VERSION=os.getenv("SINGLE_VERSION")
+if not VERSION:
+    VERSION="1.20-ubi8"
+
+class TestNginxExTemplate:
+
+    def setup_method(self):
+        self.oc_api = OpenShiftAPI(pod_name_prefix="nginx-example")
+        json_raw_file = self.oc_api.get_raw_url_for_json(
+            container="nginx-container", dir="imagestreams", filename="nginx-rhel.json"
+        )
+        self.oc_api.import_is(path=json_raw_file, name="nginx")
+
+    def teardown_method(self):
+        self.oc_api.delete_project()
+
+    def test_template_inside_cluster(self):
+        template_json = self.oc_api.get_raw_url_for_json(
+            container="nginx-ex", dir="openshift/templates", filename="nginx.json"
+        )
+        assert self.oc_api.deploy_template(
+            template=template_json, name_in_template="nginx-example", expected_output="Welcome to your static nginx application",
+            openshift_args=["SOURCE_REPOSITORY_REF=master", f"NGINX_VERSION={VERSION}", "NAME=nginx-example"]
+        )
+        assert self.oc_api.template_deployed(name_in_template="nginx-example")
+        assert self.oc_api.check_response_inside_cluster(
+            name_in_template="nginx-example", expected_output="Welcome to your static nginx application"
+        )
+
+    def test_template_by_request(self):
+        template_json = self.oc_api.get_raw_url_for_json(
+            container="nginx-ex", dir="openshift/templates", filename="nginx.json"
+        )
+        assert self.oc_api.deploy_template(
+            template=template_json, name_in_template="nginx-example", expected_output="Welcome to your static nginx application",
+            openshift_args=["SOURCE_REPOSITORY_REF=master", f"NGINX_VERSION={VERSION}", "NAME=nginx-example"]
+        )
+        assert self.oc_api.template_deployed(name_in_template="nginx-example")
+        assert self.oc_api.check_response_outside_cluster(
+            name_in_template="nginx-example", expected_output="Welcome to your static nginx application"
+        )