Test inspect_established_receptor_connections

Add functional test case for inspecting
established receptor connections.

InstanceLink starts in ADDING state, and should
move to ESTABLISHED state if the connection
is detected in the receptor status output.

Signed-off-by: Seth Foster <fosterbseth@gmail.com>

awx/main/tests/functional/test_linkstate.py

@@ -0,0 +1,30 @@
+import pytest
+
+from awx.main.models import Instance, ReceptorAddress, InstanceLink
+from awx.main.tasks.system import inspect_established_receptor_connections
+
+
+@pytest.mark.django_db
+class TestLinkState:
+    @pytest.fixture(autouse=True)
+    def configure_settings(self, settings):
+        settings.IS_K8S = True
+
+    def test_inspect_established_receptor_connections(self):
+        '''
+        Change link state from ADDING to ESTABLISHED
+        if the receptor status KnownConnectionCosts field
+        has an entry for the source and target node.
+        '''
+        hop1 = Instance.objects.create(hostname='hop1')
+        hop2 = Instance.objects.create(hostname='hop2')
+        hop2addr = ReceptorAddress.objects.create(instance=hop2, address='hop2', port=5678)
+        InstanceLink.objects.create(source=hop1, target=hop2addr, link_state=InstanceLink.States.ADDING)
+
+        # calling with empty KnownConnectionCosts should not change the link state
+        inspect_established_receptor_connections({"KnownConnectionCosts": {}})
+        assert InstanceLink.objects.get(source=hop1, target=hop2addr).link_state == InstanceLink.States.ADDING
+
+        mesh_state = {"KnownConnectionCosts": {"hop1": {"hop2": 1}}}
+        inspect_established_receptor_connections(mesh_state)
+        assert InstanceLink.objects.get(source=hop1, target=hop2addr).link_state == InstanceLink.States.ESTABLISHED