[rubygems/rubygems] Revert https://github.com/rubygems/rubygems/pull/3445

  These changes completely broke the test suite on ruby core repository.

https://github.com/rubygems/rubygems/commit/84b0bea3e1

1 files changed, 15 insertions, 2 deletions

diff --git a/lib/rubygems/test_case.rb b/lib/rubygems/test_case.rb
index 1a2746d855..054deb222a 100644
--- a/lib/rubygems/test_case.rb
+++ b/lib/rubygems/test_case.rb
@@ -11,7 +11,10 @@ if File.exist?(bundler_gemspec)
   Gem::Specification.dirs.shift
 end
 
-gem 'minitest', '~> 5.13'
+begin
+  gem 'minitest', '~> 5.13'
+rescue Gem::LoadError
+end
 
 begin
   require 'simplecov'
@@ -95,7 +98,7 @@ end
 # and uninstall gems, fetch remote gems through a stub fetcher and be assured
 # your normal set of gems is not affected.
 
-class Gem::TestCase < Minitest::Test
+class Gem::TestCase < (defined?(Minitest::Test) ? Minitest::Test : MiniTest::Unit::TestCase)
 
   extend Gem::Deprecate
 
@@ -124,6 +127,11 @@ class Gem::TestCase < Minitest::Test
     assert_equal expected.sort, loaded.sort if expected
   end
 
+  def assert_path_exists(path, msg = nil)
+    msg = message(msg) { "Expected path '#{path}' to exist" }
+    assert File.exist?(path), msg
+  end
+
   def assert_directory_exists(path, msg = nil)
     msg = message(msg) { "Expected path '#{path}' to be a directory" }
     assert_path_exists path
@@ -217,6 +225,11 @@ class Gem::TestCase < Minitest::Test
     end
   end
 
+  def refute_path_exists(path, msg = nil)
+    msg = message(msg) { "Expected path '#{path}' to not exist" }
+    refute File.exist?(path), msg
+  end
+
   def scan_make_command_lines(output)
     output.scan(/^#{Regexp.escape make_command}(?:[[:blank:]].*)?$/)
   end