(NETDEV-37) Add support for hostname

CHANGELOG.md

@@ -17,6 +17,8 @@ Changelog
    * `vlan`
    * `set_erspan_dscp`
    * `set_erspan_gre_proto`
+* Extend network_dns with attributes:
+  * `hostname`
 * Added ability to specify environment at run time
 
 Example:

lib/cisco_node_utils/cmd_ref/hostname.yaml

@@ -0,0 +1,8 @@
+# hostname
+---
+
+name:
+  get_command: "show running-config all | include 'hostname '"
+  get_value: '/^hostname (\S+)$/'
+  set_value: "<state> hostname <name>"
+  default_value: ""

lib/cisco_node_utils/hostname.rb

@@ -0,0 +1,62 @@
+# Hostname provider class
+#
+# September 2018
+#
+# Copyright (c) 2014-2018 Cisco and/or its affiliates.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+require_relative 'node_util'
+
+module Cisco
+  # Hostname- node utility class for hostname configuration
+  class HostName < NodeUtil
+    attr_reader :name
+
+    def initialize(name, instantiate=true)
+      @name = name
+      create if instantiate
+    end
+
+    def self.hostname
+      hash = {}
+      hostname = config_get('hostname', 'name')
+      hash[hostname] = HostName.new(hostname, false)
+      hash
+    end
+
+    def hostname=(host)
+      if host
+        config_set(
+          'hostname', 'name',
+          state: '', name: host)
+      else
+        config_set(
+          'hostname', 'name',
+          state: 'no', name: '')
+      end
+    end
+
+    def ==(other)
+      name == other.name
+    end
+
+    def create
+      config_set('hostname', 'name', state: '', name: @name)
+    end
+
+    def destroy
+      config_set('hostname', 'name', state: 'no', name: @name)
+    end
+  end # class
+end # module

tests/test_hostname.rb

@@ -0,0 +1,64 @@
+#
+# Minitest for HostName class
+#
+# Copyright (c) 2014-2018 Cisco and/or its affiliates.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+require_relative 'ciscotest'
+require_relative '../lib/cisco_node_utils/hostname'
+
+# TestHostname - Minitest for SyslogSetting node utility.
+class TestHostName < CiscoTestCase
+  def setup
+    # setup runs at the beginning of each test
+    super
+    hostname_setup
+  end
+
+  def teardown
+    # teardown runs at the end of each test
+    hostname_teardown
+    super
+  end
+
+  @current_hostname = ''
+
+  def hostname_setup
+    hostname_output = Cisco::Client.filter_cli(
+      cli_output: config('show running-config | include ^hostname'),
+      value:      /hostname (.*)/)
+    @current_hostname = hostname_output.first unless hostname_output.nil?
+    # Turn the feature off for a clean test.
+    config('no hostname')
+  end
+
+  def hostname_teardown
+    if @current_hostname != ''
+      config("hostname #{@current_hostname}")
+    else
+      config('no hostname')
+    end
+  end
+
+  # TESTS
+
+  def test_hostname_name
+    hostname_setting = Cisco::HostName.new('testhost')
+    assert_equal(Cisco::HostName.hostname['testhost'], hostname_setting)
+    hostname_setting = Cisco::HostName.new('testhost2')
+    assert_equal(Cisco::HostName.hostname['testhost2'], hostname_setting)
+    hostname_setting.send('hostname=', nil)
+    assert_nil(Cisco::HostName.hostname['testhost2'])
+  end
+end