* object.c (rb_Hash): trivial optimization.

* test/ruby/test_object.rb (TestObject#test_convert_hash): fix
  arguments order.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@34368 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

object.c

@@ -2600,7 +2600,7 @@ rb_Hash(VALUE val)
     if (NIL_P(val)) return rb_hash_new();
     VALUE tmp = rb_check_hash_type(val);
     if (NIL_P(tmp)) {
-	if (TYPE(val) == T_ARRAY && RARRAY_LEN(val) == 0) 
+	if (RB_TYPE_P(val, T_ARRAY) && RARRAY_LEN(val) == 0)
 	    return rb_hash_new();
 	rb_raise(rb_eTypeError, "can't convert %s into Hash", rb_obj_classname(val));
     }

test/ruby/test_object.rb

@@ -198,14 +198,14 @@ def o.respond_to?(*) false; end
   end
 
   def test_convert_hash
-    assert_equal(Hash(nil), {})
-    assert_equal(Hash([]), {})
-    assert_equal(Hash(key: :value), {key: :value})
+    assert_equal({}, Hash(nil))
+    assert_equal({}, Hash([]))
+    assert_equal({key: :value}, Hash(key: :value))
     assert_raise(TypeError) { Hash([1,2]) }
     assert_raise(TypeError) { Hash(Object.new) }
     o = Object.new
     def o.to_hash; {a: 1, b: 2}; end
-    assert_equal(Hash(o), {a: 1, b: 2})
+    assert_equal({a: 1, b: 2}, Hash(o))
     def o.to_hash; 9; end
     assert_raise(TypeError) { Hash(o) }
   end