bundle exec rspec fix for ruby3.2 (#1709)

Replace File.exists? with File.exist? and
set empty host when nil on finalize_from_uri

Closes #1708

lib/vagrant-libvirt/config.rb

@@ -1304,8 +1304,8 @@ module VagrantPlugins
           end
         end
 
-        # Extract host values from uri if provided, otherwise nil
-        @host = uri.host
+        # Extract host values from uri if provided, otherwise set empty string
+        @host = uri.host || ""
         @port = uri.port
         # only override username if there is a value provided
         @username = nil if @username == UNSET_VALUE

spec/support/libvirt_acceptance_context.rb

@@ -71,7 +71,7 @@ shared_context 'libvirt_acceptance' do
     # allows for a helper Vagrantfile to force specific provider options if testing
     # environment needs them
     vagrantfile = File.join(vagrant_home, 'Vagrantfile')
-    if File.exists?(vagrantfile) and !File.exists?(File.join(target_env.homedir, 'Vagrantfile'))
+    if File.exist?(vagrantfile) and !File.exist?(File.join(target_env.homedir, 'Vagrantfile'))
       FileUtils.cp(vagrantfile, target_env.homedir)
     end
   end

spec/support/matchers/have_file_content.rb

@@ -45,7 +45,7 @@ require "rspec/expectations/version"
 #     end
 RSpec::Matchers.define :have_file_content do |expected|
   match do |actual|
-    next false unless File.exists?(actual)
+    next false unless File.exist?(actual)
 
     @actual   = File.read(actual).chomp
     @expected = if expected.is_a? String

spec/unit/action/clean_machine_folder_spec.rb

@@ -20,7 +20,7 @@ describe VagrantPlugins::ProviderLibvirt::Action::CleanMachineFolder do
 
         expect(subject.call(env)).to be_nil
 
-        expect(File.exists?(machine.data_dir)).to eq(true)
+        expect(File.exist?(machine.data_dir)).to eq(true)
         expect(Dir.entries(machine.data_dir)).to match_array([".", ".."])
       end
     end
@@ -38,7 +38,7 @@ describe VagrantPlugins::ProviderLibvirt::Action::CleanMachineFolder do
 
         expect(subject.call(env)).to be_nil
 
-        expect(File.exists?(machine.data_dir)).to eq(true)
+        expect(File.exist?(machine.data_dir)).to eq(true)
         expect(Dir.entries(machine.data_dir)).to match_array([".", ".."])
       end
     end
@@ -51,7 +51,7 @@ describe VagrantPlugins::ProviderLibvirt::Action::CleanMachineFolder do
 
         expect(subject.call(env)).to be_nil
 
-        expect(File.exists?(machine.data_dir)).to eq(true)
+        expect(File.exist?(machine.data_dir)).to eq(true)
         expect(Dir.entries(machine.data_dir)).to match_array([".", ".."])
       end
     end

spec/unit/config_spec.rb

@@ -86,7 +86,7 @@ describe VagrantPlugins::ProviderLibvirt::Config do
         ],
         [ # connect explicit to unix socket
           {:uri => "qemu+unix:///system"},
-          {:uri => "qemu+unix:///system", :connect_via_ssh => false, :host => nil, :username => nil},
+          {:uri => "qemu+unix:///system", :connect_via_ssh => false, :host => "", :username => nil},
         ],
         [ # via libssh2 should enable ssh as well
           {:uri => "qemu+libssh2://user@remote/system?known_hosts=/home/user/.ssh/known_hosts"},
@@ -139,7 +139,7 @@ describe VagrantPlugins::ProviderLibvirt::Config do
         ],
         [ # with session and using ssh infer connect by ssh and ignore host as not provided
           {},
-          {:uri => "qemu+ssh:///session", :qemu_use_session => true, :connect_via_ssh => true, :host => nil},
+          {:uri => "qemu+ssh:///session", :qemu_use_session => true, :connect_via_ssh => true, :host => ""},
           {
             :env => {'LIBVIRT_DEFAULT_URI' => "qemu+ssh:///session"},
           }