1 files changed, 27 insertions, 0 deletions
diff --git a/activemodel/test/cases/type/string_test.rb b/activemodel/test/cases/type/string_test.rb
new file mode 100644
index 0000000000..7b25a1ef74
--- /dev/null
+++ b/activemodel/test/cases/type/string_test.rb
@@ -0,0 +1,27 @@
+require "cases/helper"
+require "active_model/type"
+
+module ActiveModel
+  class StringTypeTest < ActiveModel::TestCase
+    test "type casting" do
+      type = Type::String.new
+      assert_equal "t", type.cast(true)
+      assert_equal "f", type.cast(false)
+      assert_equal "123", type.cast(123)
+    end
+
+    test "immutable strings are not duped coming out" do
+      s = "foo"
+      type = Type::ImmutableString.new
+      assert_same s, type.cast(s)
+      assert_same s, type.deserialize(s)
+    end
+
+    test "values are duped coming out" do
+      s = "foo"
+      type = Type::String.new
+      assert_not_same s, type.cast(s)
+      assert_not_same s, type.deserialize(s)
+    end
+  end
+end