1 files changed, 20 insertions, 4 deletions
diff --git a/spec/ruby/shared/file/writable_real.rb b/spec/ruby/shared/file/writable_real.rb
index e9721fd379..4602996187 100644
--- a/spec/ruby/shared/file/writable_real.rb
+++ b/spec/ruby/shared/file/writable_real.rb
@@ -16,13 +16,29 @@ describe :file_writable_real, shared: true do
   end
 
   it "raises an ArgumentError if not passed one argument" do
-    -> { File.writable_real?        }.should raise_error(ArgumentError)
+    -> { File.writable_real?        }.should.raise(ArgumentError)
   end
 
   it "raises a TypeError if not passed a String type" do
-    -> { @object.send(@method, 1)     }.should raise_error(TypeError)
-    -> { @object.send(@method, nil)   }.should raise_error(TypeError)
-    -> { @object.send(@method, false) }.should raise_error(TypeError)
+    -> { @object.send(@method, 1)     }.should.raise(TypeError)
+    -> { @object.send(@method, nil)   }.should.raise(TypeError)
+    -> { @object.send(@method, false) }.should.raise(TypeError)
+  end
+
+  platform_is_not :windows do
+    as_real_superuser do
+      context "when run by a real superuser" do
+        it "returns true unconditionally" do
+          file = tmp('temp.txt')
+          touch file
+
+          File.chmod(0555, file)
+          @object.send(@method, file).should == true
+
+          rm_r file
+        end
+      end
+    end
   end
 end