spec_helper: add :needs_systemd

Signed-off-by: botantony <antonsm21@gmail.com>

Library/Homebrew/services/formula_wrapper.rb

@@ -181,6 +181,8 @@ module Services
     sig { returns(T.nilable(Integer)) }
     def pid
       status_output, _, status_type = status_output_success_type
+      return if status_type.nil?
+
       Regexp.last_match(1).to_i if status_output =~ pid_regex(status_type)
     end
 
@@ -188,6 +190,8 @@ module Services
     sig { returns(T.nilable(Integer)) }
     def exit_code
       status_output, _, status_type = status_output_success_type
+      return if status_type.nil?
+
       Regexp.last_match(1).to_i if status_output =~ exit_code_regex(status_type)
     end
 

Library/Homebrew/test/cmd/services_spec.rb

@@ -3,7 +3,7 @@
 require "cmd/services"
 require "cmd/shared_examples/args_parse"
 
-RSpec.describe Homebrew::Cmd::Services do
+RSpec.describe Homebrew::Cmd::Services, :needs_daemon_manager do
   it_behaves_like "parseable arguments"
 
   it "allows controlling services", :integration_test do

Library/Homebrew/test/services/system_spec.rb

@@ -24,7 +24,7 @@ RSpec.describe Services::System do
   end
 
   describe "#systemctl?" do
-    it "Linux - outputs systemctl presence", :needs_linux do
+    it "Linux with SystemD - outputs systemctl presence", :needs_systemd do
       expect(described_class.systemctl?).to be(true)
     end
 

Library/Homebrew/test/spec_helper.rb

@@ -171,6 +171,14 @@ RSpec.configure do |config|
     skip "Requires homebrew/core to be tapped." unless Dir.exist?(core_tap_path)
   end
 
+  config.before(:each, :needs_systemd) do
+    skip "No SystemD found." unless which("systemctl")
+  end
+
+  config.before(:each, :needs_daemon_manager) do
+    skip "No LaunchCTL or SystemD found." if !which("systemctl") && !which("launchctl")
+  end
+
   config.before do |example|
     next if example.metadata.key?(:needs_network)
     next if example.metadata.key?(:needs_utils_curl)