1 files changed, 18 insertions, 0 deletions
diff --git a/activemodel/test/cases/type/unsigned_integer_test.rb b/activemodel/test/cases/type/unsigned_integer_test.rb
new file mode 100644
index 0000000000..16301b3ac0
--- /dev/null
+++ b/activemodel/test/cases/type/unsigned_integer_test.rb
@@ -0,0 +1,18 @@
+require "cases/helper"
+require "active_model/type"
+
+module ActiveModel
+  module Type
+    class UnsignedIntegerTest < ActiveModel::TestCase
+      test "unsigned int max value is in range" do
+        assert_equal(4294967295, UnsignedInteger.new.serialize(4294967295))
+      end
+
+      test "minus value is out of range" do
+        assert_raises(::RangeError) do
+          UnsignedInteger.new.serialize(-1)
+        end
+      end
+    end
+  end
+end