1 files changed, 36 insertions, 0 deletions
diff --git a/tool/lib/test/unit/testcase.rb b/tool/lib/test/unit/testcase.rb
new file mode 100644
index 0000000000..58cfbcab99
--- /dev/null
+++ b/tool/lib/test/unit/testcase.rb
@@ -0,0 +1,36 @@
+# frozen_string_literal: true
+require 'test/unit/assertions'
+
+module Test
+  module Unit
+    # remove silly TestCase class
+    remove_const(:TestCase) if defined?(self::TestCase)
+
+    class TestCase < MiniTest::Unit::TestCase # :nodoc: all
+      include Assertions
+
+      def on_parallel_worker?
+        false
+      end
+
+      def run runner
+        @options = runner.options
+        super runner
+      end
+
+      def self.test_order
+        :sorted
+      end
+
+      def self.method_added(name)
+        super
+        return unless name.to_s.start_with?("test_")
+        @test_methods ||= {}
+        if @test_methods[name]
+          warn "test/unit warning: method #{ self }##{ name } is redefined"
+        end
+        @test_methods[name] = true
+      end
+    end
+  end
+end