tests: create a test to check for mon_initial_members

Signed-off-by: Alfredo Deza <adeza@redhat.com>

Resolves: pytest#harness

tests/functional/tests/mon/test_initial_members.py

@@ -0,0 +1,32 @@
+import pytest
+
+
+
+uses_mon_initial_members = pytest.mark.skipif(
+    'mon_initial_members' not in pytest.config.slaveinput['node_config']['components'],
+    reason="only run in monitors configured with initial_members"
+)
+
+
+class TestMon(object):
+
+    def get_line_from_config(self, string, conf_path):
+        with open(conf_path) as ceph_conf:
+            ceph_conf_lines = ceph_conf.readlines()
+            for line in ceph_conf:
+                if string in line:
+                    return line
+
+    @uses_mon_initial_members
+    def test_ceph_config_has_inital_members_line(self, scenario_config):
+        cluster_name = scenario_config.get('ceph', {}).get('cluster_name', 'ceph')
+        ceph_conf_path = '/etc/ceph/%s.conf' % cluster_name
+        initial_members_line = self.get_line_from_config('mon_initial_members', ceph_conf_path)
+        assert initial_members_line
+
+    @uses_mon_initial_members
+    def test_initial_members_line_has_correct_value(self, scenario_config):
+        cluster_name = scenario_config.get('ceph', {}).get('cluster_name', 'ceph')
+        ceph_conf_path = '/etc/ceph/%s.conf' % cluster_name
+        initial_members_line = self.get_line_from_config('mon_initial_members', ceph_conf_path)
+        assert initial_members_line == 'mon_initial_members = mon0'