Add in-tree mspec and ruby/spec

* For easier modifications of ruby/spec by MRI developers.
* .gitignore: track changes under spec.
* spec/mspec, spec/rubyspec: add in-tree mspec and ruby/spec.
  These files can therefore be updated like any other file in MRI.
  Instructions are provided in spec/README.
  [Feature #13156] [ruby-core:79246]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@58595 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 80 insertions, 0 deletions

diff --git a/spec/rubyspec/core/file/realpath_spec.rb b/spec/rubyspec/core/file/realpath_spec.rb
new file mode 100644
index 0000000000..e6ddfdad7c
--- /dev/null
+++ b/spec/rubyspec/core/file/realpath_spec.rb
@@ -0,0 +1,80 @@
+require File.expand_path('../../../spec_helper', __FILE__)
+
+platform_is_not :windows do
+  describe "File.realpath" do
+    before :each do
+      @real_dir = tmp('dir_realpath_real')
+      @link_dir = tmp('dir_realpath_link')
+
+      mkdir_p @real_dir
+      File.symlink(@real_dir, @link_dir)
+
+      @file = File.join(@real_dir, 'file')
+      @link = File.join(@link_dir, 'link')
+
+      touch @file
+      File.symlink(@file, @link)
+
+      @fake_file = File.join(@real_dir, 'fake_file')
+      @fake_link = File.join(@link_dir, 'fake_link')
+
+      File.symlink(@fake_file, @fake_link)
+
+      @dir_for_relative_link = File.join(@real_dir, 'dir1')
+      mkdir_p @dir_for_relative_link
+
+      @relative_path_to_file = File.join('..', 'file')
+      @relative_symlink = File.join(@dir_for_relative_link, 'link')
+      File.symlink(@relative_path_to_file, @relative_symlink)
+    end
+
+    after :each do
+      rm_r @file, @link, @fake_link, @real_dir, @link_dir
+    end
+
+    it "returns '/' when passed '/'" do
+      File.realpath('/').should == '/'
+    end
+
+    it "returns the real (absolute) pathname not containing symlinks" do
+      File.realpath(@link).should == @file
+    end
+
+    it "uses base directory for interpreting relative pathname" do
+      File.realpath(File.basename(@link), @link_dir).should == @file
+    end
+
+    it "uses current directory for interpreting relative pathname" do
+      Dir.chdir @link_dir do
+        File.realpath(File.basename(@link)).should == @file
+      end
+    end
+
+    it "uses link directory for expanding relative links" do
+      File.realpath(@relative_symlink).should == @file
+    end
+
+    it "raises an Errno::ELOOP if the symlink points to itself" do
+      File.unlink @link
+      File.symlink(@link, @link)
+      lambda { File.realpath(@link) }.should raise_error(Errno::ELOOP)
+    end
+
+    it "raises Errno::ENOENT if the file is absent" do
+      lambda { File.realpath(@fake_file) }.should raise_error(Errno::ENOENT)
+    end
+
+    it "raises Errno::ENOENT if the symlink points to an absent file" do
+      lambda { File.realpath(@fake_link) }.should raise_error(Errno::ENOENT)
+    end
+  end
+end
+
+platform_is :windows do
+  describe "File.realpath" do
+    it "returns the same path" do
+      file = __FILE__
+      File.realpath(file).should == file
+    end
+  end
+end