minitest: use class constant location as test suite source location

lib/datadog/ci/contrib/minitest/helpers.rb

@@ -6,7 +6,12 @@ module Contrib
       module Minitest
         module Helpers
           def self.test_suite_name(klass, method_name)
-            source_location, = klass.instance_method(method_name).source_location
+            source_location = extract_source_location_from_class(klass)
+            # if we are in anonymous class, fallback to the method source location
+            if source_location.nil?
+              source_location, = klass.instance_method(method_name).source_location
+            end
+
             source_file_path = Pathname.new(source_location.to_s).relative_path_from(Pathname.pwd).to_s
 
             "#{klass.name} at #{source_file_path}"
@@ -16,6 +21,15 @@ def self.parallel?(klass)
             klass.ancestors.include?(::Minitest::Parallel::Test) ||
               (defined?(::Minitest::Queue) && ::Minitest.singleton_class.ancestors.include?(::Minitest::Queue))
           end
+
+          def self.extract_source_location_from_class(klass)
+            return nil if klass.nil? || klass.name.nil?
+
+            source_location = klass.const_source_location(klass.name)
+            source_location.first unless source_location.nil?
+          rescue
+            nil
+          end
         end
       end
     end

sig/datadog/ci/contrib/minitest/helpers.rbs

@@ -6,6 +6,8 @@ module Datadog
           def self.test_suite_name: (untyped klass, String? method_name) -> ::String
 
           def self.parallel?: (untyped klass) -> bool
+
+          def self.extract_source_location_from_class: (untyped klass) -> String?
         end
       end
     end