1 files changed, 36 insertions, 0 deletions

diff --git a/spec/ruby/core/file/setgid_spec.rb b/spec/ruby/core/file/setgid_spec.rb
new file mode 100644
index 0000000000..f5df5390f5
--- /dev/null
+++ b/spec/ruby/core/file/setgid_spec.rb
@@ -0,0 +1,36 @@
+require_relative '../../spec_helper'
+require_relative '../../shared/file/setgid'
+
+describe "File.setgid?" do
+  it_behaves_like :file_setgid, :setgid?, File
+end
+
+describe "File.setgid?" do
+  before :each do
+    @name = tmp('test.txt')
+    touch @name
+  end
+
+  after :each do
+    rm_r @name
+  end
+
+  it "returns false if the file was just made" do
+    File.setgid?(@name).should == false
+  end
+
+  it "returns false if the file does not exist" do
+    rm_r @name # delete it prematurely, just for this part
+    File.setgid?(@name).should == false
+  end
+
+  as_superuser do
+    platform_is_not :windows do
+      it "returns true when the gid bit is set" do
+        system "chmod g+s #{@name}"
+
+        File.setgid?(@name).should == true
+      end
+    end
+  end
+end