1 files changed, 46 insertions, 0 deletions
diff --git a/test/dl/test_handle.rb b/test/dl/test_handle.rb
index d46e16c084..a9d12eab4f 100644
--- a/test/dl/test_handle.rb
+++ b/test/dl/test_handle.rb
@@ -2,6 +2,52 @@ require 'test_base'
 
 module DL
   class TestHandle < TestBase
+    def test_sym_closed_handle
+      handle = DL::Handle.new(LIBC_SO)
+      handle.close
+      assert_raises(DL::DLError) { handle.sym("calloc") }
+      assert_raises(DL::DLError) { handle["calloc"] }
+    end
+
+    def test_sym_unknown
+      handle = DL::Handle.new(LIBC_SO)
+      assert_raises(DL::DLError) { handle.sym('fooo') }
+      assert_raises(DL::DLError) { handle['fooo'] }
+    end
+
+    def test_sym_with_bad_args
+      handle = DL::Handle.new(LIBC_SO)
+      assert_raises(TypeError) { handle.sym(nil) }
+      assert_raises(TypeError) { handle[nil] }
+    end
+
+    def test_sym_secure
+      assert_raises(SecurityError) do
+        Thread.new do
+          $SAFE = 2
+          handle = DL::Handle.new(LIBC_SO)
+          handle.sym('calloc')
+        end.join
+      end
+    end
+
+    def test_sym
+      handle = DL::Handle.new(LIBC_SO)
+      assert handle.sym('calloc')
+      assert handle['calloc']
+    end
+
+    def test_handle_close
+      handle = DL::Handle.new(LIBC_SO)
+      assert_equal 0, handle.close
+    end
+
+    def test_handle_close_twice
+      handle = DL::Handle.new(LIBC_SO)
+      handle.close
+      handle.close rescue DL::DLError
+    end
+
     def test_dlopen_returns_handle
       assert_instance_of DL::Handle, dlopen(LIBC_SO)
     end