Add tests

Author: satmandu

test/fileutils/test_fileutils.rb

@@ -1237,6 +1237,14 @@ def test_install_pathname
       install Pathname.new('tmp/a'), 'tmp/b'
       rm_f 'tmp/a'; touch 'tmp/a'
       install Pathname.new('tmp/a'), Pathname.new('tmp/b')
+      my_rm_rf 'tmp/new_dir_end_with_slash'
+      install Pathname.new('tmp/a'), 'tmp/new_dir_end_with_slash/'
+      my_rm_rf 'tmp/new_dir_end_with_slash'
+      my_rm_rf 'tmp/new_dir'
+      install Pathname.new('tmp/a'), 'tmp/new_dir/a'
+      my_rm_rf 'tmp/new_dir'
+      install Pathname.new('tmp/a'), 'tmp/new_dir/new_dir_end_with_slash/'
+      my_rm_rf 'tmp/new_dir'
       rm_f 'tmp/a'
       touch 'tmp/a'
       touch 'tmp/b'