Add a test for restoring file permissions on extract.

test/file_options_test.rb

@@ -3,15 +3,46 @@
 class FileOptionsTest < MiniTest::Test
   ZIPPATH = ::File.join(Dir.tmpdir, 'options.zip').freeze
   TXTPATH = ::File.expand_path(::File.join('data', 'file1.txt'), __dir__).freeze
+  TXTPATH_600 = ::File.join(Dir.tmpdir, 'file1.600.txt').freeze
+  TXTPATH_755 = ::File.join(Dir.tmpdir, 'file1.755.txt').freeze
   EXTPATH_1 = ::File.join(Dir.tmpdir, 'extracted_1.txt').freeze
   EXTPATH_2 = ::File.join(Dir.tmpdir, 'extracted_2.txt').freeze
+  EXTPATH_3 = ::File.join(Dir.tmpdir, 'extracted_3.txt').freeze
   ENTRY_1 = 'entry_1.txt'.freeze
   ENTRY_2 = 'entry_2.txt'.freeze
+  ENTRY_3 = 'entry_3.txt'.freeze
 
   def teardown
     ::File.unlink(ZIPPATH) if ::File.exist?(ZIPPATH)
     ::File.unlink(EXTPATH_1) if ::File.exist?(EXTPATH_1)
     ::File.unlink(EXTPATH_2) if ::File.exist?(EXTPATH_2)
+    ::File.unlink(EXTPATH_3) if ::File.exist?(EXTPATH_3)
+    ::File.unlink(TXTPATH_600) if ::File.exist?(TXTPATH_600)
+    ::File.unlink(TXTPATH_755) if ::File.exist?(TXTPATH_755)
+  end
+
+  def test_restore_permissions
+    # Copy and set up files with different permissions.
+    ::FileUtils.cp(TXTPATH, TXTPATH_600)
+    ::File.chmod(0600, TXTPATH_600)
+    ::FileUtils.cp(TXTPATH, TXTPATH_755)
+    ::File.chmod(0755, TXTPATH_755)
+
+    ::Zip::File.open(ZIPPATH, true) do |zip|
+      zip.add(ENTRY_1, TXTPATH)
+      zip.add(ENTRY_2, TXTPATH_600)
+      zip.add(ENTRY_3, TXTPATH_755)
+    end
+
+    zip = ::Zip::File.new(ZIPPATH, false, false, restore_permissions: true)
+    zip.extract(ENTRY_1, EXTPATH_1)
+    zip.extract(ENTRY_2, EXTPATH_2)
+    zip.extract(ENTRY_3, EXTPATH_3)
+    zip.close
+
+    assert_equal(::File.stat(TXTPATH).mode, ::File.stat(EXTPATH_1).mode)
+    assert_equal(::File.stat(TXTPATH_600).mode, ::File.stat(EXTPATH_2).mode)
+    assert_equal(::File.stat(TXTPATH_755).mode, ::File.stat(EXTPATH_3).mode)
   end
 
   def test_restore_times_true