Added unit test for tinycore change_host_name.

test/unit/plugins/guests/tinycore/cap/change_host_name_test.rb

@@ -0,0 +1,26 @@
+require File.expand_path("../../../../../base", __FILE__)
+
+describe "VagrantPlugins::GuestTinyCore::Cap::ChangeHostName" do
+  let(:described_class) do
+    VagrantPlugins::GuestTinyCore::Plugin.components.guest_capabilities[:tinycore].get(:change_host_name)
+  end
+  let(:machine) { double("machine") }
+  let(:communicator) { VagrantTests::DummyCommunicator::Communicator.new(machine) }
+  let(:old_hostname) { 'boot2docker' }
+
+  before do
+    allow(machine).to receive(:communicate).and_return(communicator)
+    communicator.stub_command('hostname -f', stdout: old_hostname)
+  end
+
+  after do
+    communicator.verify_expectations!
+  end
+
+  describe ".change_host_name" do
+    it "refreshes the hostname service with the sethostname command" do
+      communicator.expect_command(%q(/usr/bin/sethostname newhostname.newdomain.tld))
+      described_class.change_host_name(machine, 'newhostname.newdomain.tld')
+    end
+  end
+end