Skip tests that suddenly started failing for MinGW

These test failures first appeared on irrelevant changes. It probably
came from changes in GitHub Actions instead of CRuby's.

Until we figure out how to fix these tests, let's skip them to make the
CI usable.

2 files changed, 4 insertions, 0 deletions

diff --git a/test/ruby/test_argf.rb b/test/ruby/test_argf.rb
index 12f7d6485a..903cd62b02 100644
--- a/test/ruby/test_argf.rb
+++ b/test/ruby/test_argf.rb
@@ -267,6 +267,7 @@ class TestArgf < Test::Unit::TestCase
   end
 
   def test_inplace_nonascii
+    omit "not working on MinGW" if /mingw/ =~ RUBY_PLATFORM
     ext = Encoding.default_external or
       omit "no default external encoding"
     t = nil
diff --git a/test/ruby/test_rubyoptions.rb b/test/ruby/test_rubyoptions.rb
index b256a70ba3..1f71c8a444 100644
--- a/test/ruby/test_rubyoptions.rb
+++ b/test/ruby/test_rubyoptions.rb
@@ -347,6 +347,7 @@ class TestRubyOptions < Test::Unit::TestCase
   end
 
   def test_chdir
+    omit "not working on MinGW" if /mingw/ =~ RUBY_PLATFORM
     assert_in_out_err(%w(-C), "", [], /Can't chdir/)
 
     assert_in_out_err(%w(-C test_ruby_test_rubyoptions_foobarbazqux), "", [], /Can't chdir/)
@@ -1043,6 +1044,7 @@ class TestRubyOptions < Test::Unit::TestCase
     end
 
     def test_command_line_progname_nonascii
+      omit "not working on MinGW" if /mingw/ =~ RUBY_PLATFORM
       bug10555 = '[ruby-dev:48752] [Bug #10555]'
       name = expected = nil
       unless (0x80..0x10000).any? {|c|
@@ -1094,6 +1096,7 @@ class TestRubyOptions < Test::Unit::TestCase
     # Since the codepage is shared all processes per conhost.exe, do
     # not chcp, or parallel test may break.
     def test_locale_codepage
+      omit "not working on MinGW" if /mingw/ =~ RUBY_PLATFORM
       locale = Encoding.find("locale")
       list = %W"\u{c7} \u{452} \u{3066 3059 3068}"
       list.each do |s|