Change the way we build the test and its expected results to accomoda…

…te for internal changes in ruby 3.3 evaluation of __FILE__ within the eval() call

fastlane/spec/plugins_specs/plugin_generator_spec.rb

@@ -111,7 +111,9 @@
     end
 
     it "creates a plugin.rb file for the plugin" do
-      plugin_rb_file = File.join(tmp_dir, gem_name, 'lib', 'fastlane', 'plugin', "#{plugin_name}.rb")
+      relative_path = File.join('lib', 'fastlane', 'plugin', "#{plugin_name}.rb")
+      plugin_rb_file = File.join(tmp_dir, gem_name, relative_path)
+
       expect(File.exist?(plugin_rb_file)).to be(true)
 
       plugin_rb_contents = File.read(plugin_rb_file)
@@ -122,7 +124,10 @@
         $LOAD_PATH.unshift(lib) unless $LOAD_PATH.include?(lib)
 
         # rubocop:disable Security/Eval
-        eval(plugin_rb_contents)
+        # starting with ruby 3.3 we must pass the __FILE__ of the actual file location for the all_class method implementation to work
+        # also we expand the relative_path within the chdir, as Dir.chdir on Mac will make it so tmp paths will always be under /private,
+        # while expand_path called from outside of the chdir will not prefix by /private
+        eval(plugin_rb_contents, binding, File.expand_path(relative_path), __LINE__)
         # rubocop:enable Security/Eval
 
         # If we evaluate the contents of the generated plugin.rb file,