Collect test output, add basic failover test.

features/basic_failover.py

@@ -0,0 +1,33 @@
+from lettuce import world, steps
+
+PATRONI_CONFIG = '{}.yml'
+
+
+@steps
+class BasicFailoverSteps(object):
+
+    def __init__(self, environ):
+        self.env = environ
+
+    def basic_replication(self, step):
+        '''Basic replication'''
+        step.behave_as("""
+            Given I start postgres0
+            And I start postgres1
+            When I add the table foo to postgres0
+            Then table foo is present on postgres1 after 10 seconds
+            """)
+
+    def start_patroni(self, step, pg_name):
+        '''I start (\w+)'''
+        return world.pctl.start_patroni(pg_name)
+
+    def stop_patroni(self, step, pg_name):
+        '''I shut down (\w+)'''
+        return world.pctl.stop_patroni(pg_name)
+
+    def check_role(self, step, pg_name, pg_role, max_promotion_timeout):
+        '''(\w+) role is the (\w+) after (\d+) seconds'''
+        return world.pctl.check_role_has_changed_to(pg_name, pg_role, timeout=int(max_promotion_timeout))
+
+BasicFailoverSteps(world)