[ruby/rdoc] Clean up home directories for each test

https://github.com/ruby/rdoc/commit/f067c174da

test/rdoc/support/test_case.rb

@@ -37,7 +37,8 @@ class RDoc::TestCase < Test::Unit::TestCase
     super
 
     @orig_home = ENV["HOME"]
-    ENV["HOME"] = Dir.tmpdir
+    FileUtils.mkdir_p(@test_home = Dir.mktmpdir("test_rdoc_"))
+    ENV["HOME"] = @test_home
 
     @top_level = nil
 
@@ -64,6 +65,7 @@ class RDoc::TestCase < Test::Unit::TestCase
 
   def teardown
     ENV["HOME"] = @orig_home if defined?(@orig_home)
+    defined?(@test_home) and FileUtils.rm_rf @test_home
 
     super
   end

test/rdoc/test_rdoc_ri_driver.rb

@@ -6,17 +6,13 @@ class TestRDocRIDriver < RDoc::TestCase
   def setup
     super
 
-    @tmpdir = File.join Dir.tmpdir, "test_rdoc_ri_driver_#{$$}"
-    @home_ri = File.join @tmpdir, 'dot_ri'
+    @home_ri = File.join @test_home, 'dot_ri'
 
-    FileUtils.mkdir_p @tmpdir
     FileUtils.mkdir_p @home_ri
 
-    @orig_ri = ENV['RI']
-    ENV['HOME'] = @tmpdir
-    @rdoc_home = File.join ENV["HOME"], ".rdoc"
+    @orig_ri = ENV.delete('RI')
+    @rdoc_home = File.join @test_home, ".rdoc"
     FileUtils.mkdir_p @rdoc_home
-    ENV.delete 'RI'
 
     @options = RDoc::RI::Driver.default_options
     @options[:use_system] = false
@@ -24,7 +20,7 @@ class TestRDocRIDriver < RDoc::TestCase
     @options[:use_home]   = false
     @options[:use_gems]   = false
 
-    @options[:home]       = @tmpdir
+    @options[:home]       = @rdoc_home
     @options[:use_stdout] = true
     @options[:formatter]  = @RM::ToRdoc
 
@@ -33,7 +29,6 @@ class TestRDocRIDriver < RDoc::TestCase
 
   def teardown
     defined?(@orig_ri) and ENV['RI'] = @orig_ri
-    defined?(@tmpdir) and FileUtils.rm_rf @tmpdir
 
     super
   end

test/rdoc/test_rdoc_store.rb

@@ -319,8 +319,7 @@ class TestRDocStore < XrefTestCase
   end
 
   def test_friendly_path
-    @orig_xdg_data_home = ENV['XDG_DATA_HOME']
-    ENV.delete('XDG_DATA_HOME')
+    @orig_xdg_data_home = ENV.delete('XDG_DATA_HOME')
 
     @s.path = @tmpdir
     @s.type = nil