1 files changed, 125 insertions, 0 deletions
diff --git a/src/onaptests/steps/loop/clamp.py b/src/onaptests/steps/loop/clamp.py
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+++ b/src/onaptests/steps/loop/clamp.py
@@ -0,0 +1,125 @@
+#!/usr/bin/python
+#
+# This program and the accompanying materials
+# are made available under the terms of the Apache License, Version 2.0
+# which accompanies this distribution, and is available at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+"""Clamp Scenario class."""
+from yaml import load
+import time
+
+from onapsdk.clamp.clamp_element import Clamp
+from onapsdk.sdc.service import Service
+
+from onapsdk.configuration import settings
+from onaptests.steps.onboard.clamp import OnboardClampStep
+from onaptests.steps.loop.instantiate_loop import InstantiateLoop
+
+from ..base import YamlTemplateBaseStep
+
+
+class ClampStep(YamlTemplateBaseStep):
+    """class defining the different CLAMP scenarios."""
+
+    count: int = 0
+
+    def __init__(self, cleanup=False):
+        super().__init__(cleanup=cleanup)
+        self._yaml_template: dict = None
+        self.add_step(OnboardClampStep(cleanup=cleanup))
+        Clamp(cert=settings.CERT)
+        self.loop_instance = None
+
+    @property
+    def yaml_template(self) -> dict:
+        """Step YAML template.
+
+        Load from file if it's a root step, get from parent otherwise.
+
+        Returns:
+            dict: Step YAML template
+
+        """
+        if self.is_root:
+            if not self._yaml_template:
+                with open(settings.SERVICE_YAML_TEMPLATE, "r") as yaml_template:
+                    self._yaml_template: dict = load(yaml_template)
+            return self._yaml_template
+        return self.parent.yaml_template
+
+    @property
+    def service_name(self) -> str:
+        """Service name.
+
+        Get from YAML template if it's a root step, get from parent otherwise.
+
+        Returns:
+            str: Service name
+
+        """
+        if self.is_root:
+            return next(iter(self.yaml_template.keys()))
+        else:
+            return self.parent.service_name
+
+
+    def check(self, operational_policies: list, is_template: bool = False) -> str:
+        """Check CLAMP requirements to create a loop."""
+        self._logger.info("Check operational policy")
+        for policy in operational_policies:
+            exist = Clamp.check_policies(policy_name=policy["name"],
+                                         req_policies=30)# 30 required policy
+            self._logger.info("Operational policy found.")
+            if not exist:
+                raise ValueError("Couldn't load the policy %s", policy)
+        # retrieve the service..based on service name
+        service: Service = Service(self.service_name)
+        if is_template:
+            loop_template = Clamp.check_loop_template(service=service)
+            self._logger.info("Loop template checked.")
+            return loop_template
+
+    def instantiate_clamp(self, loop_template: str, loop_name: str, operational_policies: list):
+        """Instantite a closed loopin CLAMP."""
+        loop = InstantiateLoop(template=loop_template,
+                               loop_name=loop_name,
+                               operational_policies=operational_policies,
+                               cert=settings.CERT)
+        return loop.instantiate_loop()
+
+    def loop_counter(self, action: str) -> None:
+        """ Count number of loop instances."""
+        if  action == "plus":
+            self.count += 1
+        if  action == "minus":
+            self.count -= 1
+
+    @YamlTemplateBaseStep.store_state
+    def execute(self):
+        super().execute() # TODO work only the 1st time, not if already onboarded
+        # time to wait for template load in CLAMP
+        self._logger.info("Wait a little bit to give a chance to the distribution")
+        time.sleep(settings.CLAMP_DISTRIBUTION_TIMER)
+        # Test 1
+        operational_policies = settings.OPERATIONAL_POLICIES
+        loop_template = self.check(operational_policies, True)
+        # Test 2
+        loop_name = "instance_" + self.service_name + str(self.count)
+        self.loop_counter(action="plus")
+        self.loop_instance = self.instantiate_clamp(
+            loop_template=loop_template,
+            loop_name=loop_name,
+            operational_policies=operational_policies)
+
+    def cleanup(self) -> None:
+        """Cleanup Service.
+
+        Raises:
+            Exception: Clamp cleaning failed
+
+        """
+        self.loop_counter(action="minus")
+        self.loop_instance.undeploy_microservice_from_dcae()
+        self.loop_instance.delete()
+        super().cleanup()