Added test-tool target for the test suite of tool/test files.

common.mk

@@ -187,6 +187,7 @@ INSTALL_DATA_MODE = 0644
 TESTSDIR      = $(srcdir)/test
 TOOL_TESTSDIR = $(srcdir)/tool/test
 TEST_EXCLUDES = --excludes-dir=$(TESTSDIR)/excludes --name=!/memory_leak/
+EXCLUDE_TESTFRAMEWORK = --exclude=/testunit/ --exclude=/minitest/
 TESTWORKDIR   = testwork
 TESTOPTS      = $(RUBY_TESTOPTS)
 
@@ -753,9 +754,14 @@ yes-test-knownbug: prog PHONY
 
 test-testframework: $(TEST_RUNNABLE)-test-testframework
 yes-test-testframework: prog PHONY
-	$(gnumake_recursive)$(Q)$(exec) $(RUNRUBY) "$(srcdir)/test/runner.rb" --ruby="$(RUNRUBY)" --basedir=$(TOOL_TESTSDIR) $(TESTOPTS) testunit minitest
+	$(gnumake_recursive)$(Q)$(exec) $(RUNRUBY) "$(TOOL_TESTSDIR)/runner.rb" --ruby="$(RUNRUBY)" --basedir=$(TOOL_TESTSDIR) $(TESTOPTS) testunit minitest
 no-test-testframework: PHONY
 
+test-tool: $(TEST_RUNNABLE)-test-tool
+yes-test-tool: prog PHONY
+	$(gnumake_recursive)$(Q)$(exec) $(RUNRUBY) "$(TOOL_TESTSDIR)/runner.rb" --ruby="$(RUNRUBY)" --basedir=$(TOOL_TESTSDIR) $(TESTOPTS) $(EXCLUDE_TESTFRAMEWORK)
+no-test-tool: PHONY
+
 test-sample: test-basic # backward compatibility for mswin-build
 test-short: btest-ruby test-knownbug test-basic
 test: test-short

tool/test/runner.rb

@@ -0,0 +1,39 @@
+# frozen_string_literal: false
+require 'rbconfig'
+
+src_testdir = File.dirname(File.realpath(__FILE__))
+$LOAD_PATH << src_testdir
+tool_dir = File.join src_testdir, ".."
+$LOAD_PATH.unshift "#{tool_dir}/lib"
+
+# Get bundled gems on load path
+Dir.glob("#{src_testdir}/../gems/*/*.gemspec")
+  .reject {|f| f =~ /minitest|test-unit|power_assert/ }
+  .map {|f| $LOAD_PATH.unshift File.join(File.dirname(f), "lib") }
+
+require 'test/unit'
+
+module Gem
+end
+class Gem::TestCase < MiniTest::Unit::TestCase
+  @@project_dir = File.dirname($LOAD_PATH.last)
+end
+
+ENV["GEM_SKIP"] = ENV["GEM_HOME"] = ENV["GEM_PATH"] = "".freeze
+
+require_relative "#{tool_dir}/lib/profile_test_all" if ENV.has_key?('RUBY_TEST_ALL_PROFILE')
+require_relative "#{tool_dir}/lib/tracepointchecker"
+require_relative "#{tool_dir}/lib/zombie_hunter"
+require_relative "#{tool_dir}/lib/iseq_loader_checker"
+
+if ENV['COVERAGE']
+  require_relative "#{tool_dir}/test-coverage.rb"
+end
+
+begin
+  exit Test::Unit::AutoRunner.run(true, src_testdir)
+rescue NoMemoryError
+  system("cat /proc/meminfo") if File.exist?("/proc/meminfo")
+  system("ps x -opid,args,%cpu,%mem,nlwp,rss,vsz,wchan,stat,start,time,etime,blocked,caught,ignored,pending,f") if File.exist?("/bin/ps")
+  raise
+end