Ripper: Add keyword options to `assert_parse_files`

test/ripper/assert_parse_files.rb

@@ -5,26 +5,39 @@ module TestRipper; end
 class TestRipper::Generic < Test::Unit::TestCase
   SRCDIR = File.expand_path("../../..", __FILE__)
 
-  def assert_parse_files(dir, pattern = "**/*.rb")
+  def assert_parse_files(dir, pattern = "**/*.rb", exclude: nil, gc_stress: GC.stress, test_ratio: nil)
+    test_ratio ||= ENV["TEST_RIPPER_RATIO"]&.tap {|s|break s.to_f} || 0.05 # testing all files needs too long time...
     assert_separately(%W[--disable-gem -rripper - #{SRCDIR}/#{dir} #{pattern}],
                       __FILE__, __LINE__, "#{<<-"begin;"}\n#{<<-'end;'}", timeout: Float::INFINITY)
+    GC.stress = false
     pattern = "#{pattern}"
+    exclude = (
+      #{exclude if exclude}
+    )
+    test_ratio = (
+      #{test_ratio}
+    )
+    gc_stress = (
+      #{gc_stress}
+    )
     begin;
-      TEST_RATIO = ENV["TEST_RIPPER_RATIO"]&.tap {|s|break s.to_f} || 0.05 # testing all files needs too long time...
       class Parser < Ripper
         PARSER_EVENTS.each {|n| eval "def on_#{n}(*args) r = [:#{n}, *args]; r.inspect; Object.new end" }
         SCANNER_EVENTS.each {|n| eval "def on_#{n}(*args) r = [:#{n}, *args]; r.inspect; Object.new end" }
       end
       dir = ARGV.shift
-      scripts = Dir.chdir(dir) {Dir[pattern]}
+      scripts = Dir.glob(pattern, base: dir)
-      if (1...scripts.size).include?(num = scripts.size * TEST_RATIO)
+      scripts.reject! {|script| File.fnmatch?(exclude, script, File::FNM_PATHNAME)} if exclude
+      if (1...scripts.size).include?(num = scripts.size * test_ratio)
         scripts = scripts.sample(num)
       end
       scripts.sort!
       for script in scripts
         assert_nothing_raised {
           parser = Parser.new(File.read("#{dir}/#{script}"), script)
-          parser.instance_eval "parse", "<#{script}>"
+          EnvUtil.under_gc_stress(gc_stress) do
+            parser.instance_eval "parse", "<#{script}>"
+          end
         }
       end
     end;