nxos_pim_rp_address fixes (#26119)

* nxos_pim_rp_address tests

* nxos_pim_rp_address changes

* Address issues with idempotence

test/units/modules/network/nxos/fixtures/nxos_pim_rp_address/config.cfg

@@ -0,0 +1 @@
+ip pim rp-address 1.2.3.4

test/units/modules/network/nxos/test_nxos_pim_rp_address.py

@@ -0,0 +1,62 @@
+# (c) 2016 Red Hat Inc.
+#
+# This file is part of Ansible
+#
+# Ansible is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# Ansible is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with Ansible.  If not, see <http://www.gnu.org/licenses/>.
+
+# Make coding more python3-ish
+from __future__ import (absolute_import, division, print_function)
+__metaclass__ = type
+
+import json
+
+from ansible.compat.tests.mock import patch
+from ansible.modules.network.nxos import nxos_pim_rp_address
+from .nxos_module import TestNxosModule, load_fixture, set_module_args
+
+
+class TestNxosPimRpAddressModule(TestNxosModule):
+
+    module = nxos_pim_rp_address
+
+    def setUp(self):
+        self.mock_load_config = patch('ansible.modules.network.nxos.nxos_pim_rp_address.load_config')
+        self.load_config = self.mock_load_config.start()
+
+        self.mock_get_config = patch('ansible.modules.network.nxos.nxos_pim_rp_address.get_config')
+        self.get_config = self.mock_get_config.start()
+
+    def tearDown(self):
+        self.mock_load_config.stop()
+        self.mock_get_config.stop()
+
+    def load_fixtures(self, commands=None, device=''):
+        self.get_config.return_value = load_fixture('nxos_pim_rp_address', 'config.cfg')
+        self.load_config.return_value = None
+
+    def test_nxos_pim_rp_address(self):
+        set_module_args(dict(rp_address='5.6.7.8'))
+        self.execute_module(changed=True, commands=['ip pim rp-address 5.6.7.8'])
+
+    def test_nxos_pim_rp_address_no_change(self):
+        set_module_args(dict(rp_address='1.2.3.4'))
+        self.execute_module(changed=False, commands=[])
+
+    def test_nxos_pim_rp_address_absent(self):
+        set_module_args(dict(rp_address='1.2.3.4', state='absent'))
+        self.execute_module(changed=True, commands=['no ip pim rp-address 1.2.3.4'])
+
+    def test_nxos_pim_rp_address_absent_no_change(self):
+        set_module_args(dict(rp_address='5.6.7.8', state='absent'))
+        self.execute_module(changed=False, commands=[])