Fixed tests

Author: ianunruh

test/reference_key_map_behavior.rb

@@ -148,14 +148,16 @@ def test_can_iterate_over_all_entries
   def test_size
     Ref::Mock.use do
       hash = map_class.new
-      assert_true hash.empty?
+      assert hash.empty?
       assert_equal 0, hash.size
+      key_1 = Object.new
       key_2 = Object.new
       hash[key_1] = "value 1"
-      assert_false hash.empty?
+      hash[key_2] = "value 2"
+      refute hash.empty?
       assert_equal 2, hash.size
       Ref::Mock.gc(key_2)
-      assert_false hash.empty?
+      refute hash.empty?
       assert_equal 1, hash.size
     end
   end

test/reference_value_map_behavior.rb

@@ -128,16 +128,16 @@ def test_can_iterate_over_all_entries
   def test_size
     Ref::Mock.use do
       hash = map_class.new
-      assert_true hash.empty?
+      assert hash.empty?
       assert_equal 0, hash.size
       value_1 = "value 1"
       value_2 = "value 2"
       hash["key 1"] = value_1
       hash["key 2"] = value_2
-      assert_false hash.empty?
+      refute hash.empty?
       assert_equal 2, hash.size
       Ref::Mock.gc(value_2)
-      assert_false hash.empty?
+      refute hash.empty?
       assert_equal 1, hash.size
     end
   end