Move spec/rubyspec to spec/ruby for consistency

* Other ruby implementations use the spec/ruby directory.
  [Misc #13792] [ruby-core:82287]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@59979 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

spec/ruby/shared/file/writable_real.rb

@@ -0,0 +1,33 @@
+describe :file_writable_real, shared: true do
+  before :each do
+    @file = tmp('i_exist')
+  end
+
+  after :each do
+    rm_r @file
+  end
+
+  it "returns true if named file is writable by the real user id of the process, otherwise false" do
+    File.open(@file,'w') { @object.send(@method, @file).should == true }
+  end
+
+  it "accepts an object that has a #to_path method" do
+    File.open(@file,'w') { @object.send(@method, mock_to_path(@file)).should == true }
+  end
+
+  it "raises an ArgumentError if not passed one argument" do
+    lambda { File.writable_real?        }.should raise_error(ArgumentError)
+  end
+
+  it "raises a TypeError if not passed a String type" do
+    lambda { @object.send(@method, 1)     }.should raise_error(TypeError)
+    lambda { @object.send(@method, nil)   }.should raise_error(TypeError)
+    lambda { @object.send(@method, false) }.should raise_error(TypeError)
+  end
+end
+
+describe :file_writable_real_missing, shared: true do
+  it "returns false if the file does not exist" do
+    @object.send(@method, 'fake_file').should == false
+  end
+end