1 files changed, 86 insertions, 0 deletions
diff --git a/spec/ruby/core/file/readlink_spec.rb b/spec/ruby/core/file/readlink_spec.rb
new file mode 100644
index 0000000000..568692b9b6
--- /dev/null
+++ b/spec/ruby/core/file/readlink_spec.rb
@@ -0,0 +1,86 @@
+require_relative '../../spec_helper'
+
+describe "File.readlink" do
+  # symlink/readlink are not supported on Windows
+  platform_is_not :windows do
+    describe "with absolute paths" do
+      before :each do
+        @file = tmp('file_readlink.txt')
+        @link = tmp('file_readlink.lnk')
+
+        File.symlink(@file, @link)
+      end
+
+      after :each do
+        rm_r @file, @link
+      end
+
+      it "returns the name of the file referenced by the given link" do
+        touch @file
+        File.readlink(@link).should == @file
+      end
+
+      it "returns the name of the file referenced by the given link when the file does not exist" do
+        File.readlink(@link).should == @file
+      end
+
+      it "raises an Errno::ENOENT if there is no such file" do
+        # TODO: missing_file
+        -> { File.readlink("/this/surely/does/not/exist") }.should.raise(Errno::ENOENT)
+      end
+
+      it "raises an Errno::EINVAL if called with a normal file" do
+        touch @file
+        -> { File.readlink(@file) }.should.raise(Errno::EINVAL)
+      end
+    end
+
+    describe "with paths containing unicode characters" do
+      before :each do
+        @file = tmp('tàrget.txt')
+        @link = tmp('lïnk.lnk')
+        File.symlink(@file, @link)
+      end
+
+      after :each do
+        rm_r @file, @link
+      end
+
+      it "returns the name of the file referenced by the given link" do
+        touch @file
+        result = File.readlink(@link)
+        result.encoding.should.equal? Encoding.find('filesystem')
+        result.should == @file.dup.force_encoding(Encoding.find('filesystem'))
+      end
+    end
+
+    describe "when changing the working directory" do
+      before :each do
+        @cwd = Dir.pwd
+        @tmpdir = tmp("/readlink")
+        Dir.mkdir @tmpdir
+        Dir.chdir @tmpdir
+
+        @link = 'readlink_link'
+        @file = 'readlink_file'
+
+        File.symlink(@file, @link)
+      end
+
+      after :each do
+        rm_r @file, @link
+        Dir.chdir @cwd
+        Dir.rmdir @tmpdir
+      end
+
+      it "returns the name of the file referenced by the given link" do
+        touch @file
+        File.readlink(@link).should == @file
+      end
+
+      it "returns the name of the file referenced by the given link when the file does not exist" do
+        File.readlink(@link).should == @file
+      end
+    end
+  end
+end