Unit tests for ChangeHostName on Enterprise Linux
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Charlie Huggard
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require File.expand_path("../../../../../base", __FILE__)
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require File.expand_path("../../../support/shared/redhat_like_host_name_examples", __FILE__)
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describe "VagrantPlugins::GuestRedHat::Cap::ChangeHostName" do
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let(:described_class) do
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VagrantPlugins::GuestRedHat::Plugin.components.guest_capabilities[:redhat].get(:change_host_name)
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end
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let(:machine) { double("machine") }
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let(:communicator) { VagrantTests::DummyCommunicator::Communicator.new(machine) }
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before do
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machine.stub(:communicate).and_return(communicator)
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communicator.stub_command('hostname -f', stdout: old_hostname)
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communicator.expect_command('hostname -f')
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end
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after do
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communicator.verify_expectations!
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end
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context 'when oldhostname is qualified' do
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let(:old_hostname) { 'oldhostname.olddomain.tld' }
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let(:similar_hostname) {'oldhostname'}
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it_behaves_like 'a full redhat-like host name change'
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include_examples 'inserting hostname in /etc/hosts'
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include_examples 'swapping simple hostname in /etc/hosts'
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include_examples 'swapping qualified hostname in /etc/hosts'
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end
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context 'when oldhostname is simple' do
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let(:old_hostname) { 'oldhostname' }
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let(:similar_hostname) {'oldhostname.olddomain.tld'}
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it_behaves_like 'a full redhat-like host name change'
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include_examples 'inserting hostname in /etc/hosts'
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include_examples 'swapping simple hostname in /etc/hosts'
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context 'and is only able to be determined by hostname (without -f)' do
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before do
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communicator.stub_command('hostname -f',nil)
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communicator.stub_command('hostname', stdout: old_hostname)
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communicator.expect_command('hostname')
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end
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it_behaves_like 'a full redhat-like host name change'
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include_examples 'inserting hostname in /etc/hosts'
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include_examples 'swapping simple hostname in /etc/hosts'
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end
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end
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context 'when the short version of hostname is localhost' do
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let(:old_hostname) { 'localhost.olddomain.tld' }
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it_behaves_like 'a partial redhat-like host name change'
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include_examples 'inserting hostname in /etc/hosts'
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it "does more even when the provided hostname is not different" do
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described_class.change_host_name(machine, old_hostname)
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communicator.received_commands.to_set.should_not == communicator.expected_commands.keys.to_set
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end
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end
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end
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shared_examples 'a partial redhat-like host name change' do
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shared_examples 'shared between newhostname styles' do
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it 'updates hostname on the machine with the new short hostname' do
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communicator.expect_command(%q(hostname newhostname))
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described_class.change_host_name(machine, new_hostname)
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end
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it 'sets dhcp_hostname with the provided short hostname' do
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communicator.expect_command(%q(sed -i 's/\\(DHCP_HOSTNAME=\\).*/\\1"newhostname"/' /etc/sysconfig/network-scripts/ifcfg-*))
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described_class.change_host_name(machine, new_hostname)
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end
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it 'restarts networking' do
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communicator.expect_command(%q(service network restart))
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described_class.change_host_name(machine, new_hostname)
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end
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end
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context 'when newhostname is qualified' do
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let(:new_hostname) {'newhostname.newdomain.tld'}
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include_examples 'shared between newhostname styles'
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it 'updates sysconfig with the provided full hostname' do
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communicator.expect_command(%q(sed -i 's/\\(HOSTNAME=\\).*/\\1newhostname.newdomain.tld/' /etc/sysconfig/network))
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described_class.change_host_name(machine, new_hostname)
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end
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end
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context 'when newhostname is simple' do
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let(:new_hostname) {'newhostname'}
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include_examples 'shared between newhostname styles'
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it 'updates sysconfig with as much hostname as is available' do
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communicator.expect_command(%q(sed -i 's/\\(HOSTNAME=\\).*/\\1newhostname/' /etc/sysconfig/network))
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described_class.change_host_name(machine, new_hostname)
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end
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end
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end
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shared_examples 'a full redhat-like host name change' do
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include_examples 'a partial redhat-like host name change'
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it "does nothing when the provided hostname is not different" do
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described_class.change_host_name(machine, old_hostname)
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communicator.received_commands.to_set.should == communicator.expected_commands.keys.to_set
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end
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it "does more when the provided hostname is a similar version" do
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described_class.change_host_name(machine, similar_hostname)
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communicator.received_commands.to_set.should_not == communicator.expected_commands.keys.to_set
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end
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end
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shared_examples 'mutating /etc/hosts helpers' do
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let(:sed_command) do
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# Here we run the change_host_name through and extract the recorded sed
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# command from the dummy communicator
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described_class.change_host_name(machine, new_hostname)
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communicator.received_commands.find { |cmd| cmd =~ %r(^sed .* /etc/hosts$) }
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end
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# Now we extract the regexp from that sed command so we can do some
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# verification on it
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let(:expression) { sed_command.sub(%r{^sed -i '\(.*\)' /etc/hosts$}, "\1") }
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let(:search) { Regexp.new(expression.split('@')[1].gsub(/\\/,'')) }
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let(:replace) { expression.split('@')[2] }
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end
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shared_examples 'inserting hostname in /etc/hosts' do
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include_examples 'mutating /etc/hosts helpers'
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context 'when target hostname is qualified' do
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let(:new_hostname) {'newhostname.newdomain.tld'}
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it 'works with a basic file' do
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original_etc_hosts = <<-ETC_HOSTS.gsub(/^ */, '')
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127.0.0.1 localhost.localdomain localhost
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::1 localhost6.localdomain6 localhost6
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ETC_HOSTS
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modified_etc_hosts = original_etc_hosts.gsub(search, replace)
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modified_etc_hosts.should == <<-RESULT.gsub(/^ */, '')
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127.0.0.1 newhostname.newdomain.tld newhostname localhost.localdomain localhost
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::1 localhost6.localdomain6 localhost6
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RESULT
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end
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end
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context 'when target hostname is simple' do
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let(:new_hostname) {'newhostname'}
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it 'works with a basic file' do
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original_etc_hosts = <<-ETC_HOSTS.gsub(/^ */, '')
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127.0.0.1 localhost.localdomain localhost
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::1 localhost6.localdomain6 localhost6
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ETC_HOSTS
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modified_etc_hosts = original_etc_hosts.gsub(search, replace)
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modified_etc_hosts.should == <<-RESULT.gsub(/^ */, '')
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127.0.0.1 newhostname localhost.localdomain localhost
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::1 localhost6.localdomain6 localhost6
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RESULT
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end
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end
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end
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shared_examples 'swapping simple hostname in /etc/hosts' do
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include_examples 'mutating /etc/hosts helpers'
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context 'when target hostname is qualified' do
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let(:new_hostname) {'newhostname.newdomain.tld'}
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it 'works with a basic file' do
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original_etc_hosts = <<-ETC_HOSTS.gsub(/^ */, '')
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127.0.0.1 oldhostname localhost.localdomain localhost
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::1 localhost6.localdomain6 localhost6
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ETC_HOSTS
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modified_etc_hosts = original_etc_hosts.gsub(search, replace)
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modified_etc_hosts.should == <<-RESULT.gsub(/^ */, '')
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127.0.0.1 newhostname.newdomain.tld newhostname localhost.localdomain localhost
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::1 localhost6.localdomain6 localhost6
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RESULT
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end
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it 'does not touch suffixed hosts' do
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original_etc_hosts = <<-ETC_HOSTS.gsub(/^ */, '')
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127.0.0.1 oldhostname oldhostname.nope localhost.localdomain localhost
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::1 localhost6.localdomain6 localhost6
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ETC_HOSTS
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modified_etc_hosts = original_etc_hosts.gsub(search, replace)
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modified_etc_hosts.should == <<-RESULT.gsub(/^ */, '')
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127.0.0.1 newhostname.newdomain.tld newhostname oldhostname.nope localhost.localdomain localhost
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::1 localhost6.localdomain6 localhost6
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RESULT
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end
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end
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context 'when target hostname is simple' do
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let(:new_hostname) {'newhostname'}
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it 'works with a basic file' do
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original_etc_hosts = <<-ETC_HOSTS.gsub(/^ */, '')
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127.0.0.1 oldhostname localhost.localdomain localhost
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::1 localhost6.localdomain6 localhost6
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ETC_HOSTS
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modified_etc_hosts = original_etc_hosts.gsub(search, replace)
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modified_etc_hosts.should == <<-RESULT.gsub(/^ */, '')
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127.0.0.1 newhostname localhost.localdomain localhost
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::1 localhost6.localdomain6 localhost6
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RESULT
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end
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it 'does not touch suffixed hosts' do
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original_etc_hosts = <<-ETC_HOSTS.gsub(/^ */, '')
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127.0.0.1 oldhostname oldhostname.nope localhost.localdomain localhost
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::1 localhost6.localdomain6 localhost6
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ETC_HOSTS
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modified_etc_hosts = original_etc_hosts.gsub(search, replace)
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modified_etc_hosts.should == <<-RESULT.gsub(/^ */, '')
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127.0.0.1 newhostname oldhostname.nope localhost.localdomain localhost
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::1 localhost6.localdomain6 localhost6
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RESULT
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end
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end
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end
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shared_examples 'swapping qualified hostname in /etc/hosts' do
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include_examples 'mutating /etc/hosts helpers'
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context 'when target hostname is qualified' do
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let(:new_hostname) {'newhostname.newdomain.tld'}
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it 'works with a basic file' do
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original_etc_hosts = <<-ETC_HOSTS.gsub(/^ */, '')
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127.0.0.1 oldhostname.olddomain.tld oldhostname localhost.localdomain localhost
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::1 localhost6.localdomain6 localhost6
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ETC_HOSTS
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modified_etc_hosts = original_etc_hosts.gsub(search, replace)
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modified_etc_hosts.should == <<-RESULT.gsub(/^ */, '')
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127.0.0.1 newhostname.newdomain.tld newhostname localhost.localdomain localhost
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::1 localhost6.localdomain6 localhost6
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RESULT
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end
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it 'does not touch suffixed hosts' do
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original_etc_hosts = <<-ETC_HOSTS.gsub(/^ */, '')
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127.0.0.1 oldhostname.olddomain.tld oldhostname oldhostname.nope localhost.localdomain localhost
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::1 localhost6.localdomain6 localhost6
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ETC_HOSTS
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modified_etc_hosts = original_etc_hosts.gsub(search, replace)
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modified_etc_hosts.should == <<-RESULT.gsub(/^ */, '')
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127.0.0.1 newhostname.newdomain.tld newhostname oldhostname.nope localhost.localdomain localhost
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::1 localhost6.localdomain6 localhost6
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RESULT
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end
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end
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context 'when target hostname is simple' do
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let(:new_hostname) {'newhostname'}
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it 'works with a basic file' do
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original_etc_hosts = <<-ETC_HOSTS.gsub(/^ */, '')
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127.0.0.1 oldhostname.olddomain.tld oldhostname localhost.localdomain localhost
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::1 localhost6.localdomain6 localhost6
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ETC_HOSTS
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modified_etc_hosts = original_etc_hosts.gsub(search, replace)
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modified_etc_hosts.should == <<-RESULT.gsub(/^ */, '')
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127.0.0.1 newhostname localhost.localdomain localhost
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::1 localhost6.localdomain6 localhost6
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RESULT
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end
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it 'does not touch suffixed hosts' do
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original_etc_hosts = <<-ETC_HOSTS.gsub(/^ */, '')
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127.0.0.1 oldhostname.olddomain.tld oldhostname oldhostname.nope localhost.localdomain localhost
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::1 localhost6.localdomain6 localhost6
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ETC_HOSTS
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modified_etc_hosts = original_etc_hosts.gsub(search, replace)
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modified_etc_hosts.should == <<-RESULT.gsub(/^ */, '')
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127.0.0.1 newhostname oldhostname.nope localhost.localdomain localhost
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::1 localhost6.localdomain6 localhost6
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RESULT
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end
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end
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end
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