1 files changed, 64 insertions, 0 deletions
diff --git a/activejob/test/cases/serializers_test.rb b/activejob/test/cases/serializers_test.rb
new file mode 100644
index 0000000000..90d4155b3b
--- /dev/null
+++ b/activejob/test/cases/serializers_test.rb
@@ -0,0 +1,64 @@
+# frozen_string_literal: true
+
+require "helper"
+require "active_job/serializers"
+
+class SerializersTest < ActiveSupport::TestCase
+  class DummyValueObject
+    attr_accessor :value
+
+    def initialize(value)
+      @value = value
+    end
+  end
+
+  class DummySerializer < ActiveJob::Serializers::ObjectSerializer
+    class << self
+      def serialize(object)
+        { key => object.value }
+      end
+
+      def deserialize(hash)
+        DummyValueObject.new(hash[key])
+      end
+
+      def key
+        "_dummy_serializer"
+      end
+
+      private
+
+      def klass
+        DummyValueObject
+      end
+    end
+  end
+
+  setup do
+    @value_object = DummyValueObject.new 123
+    ActiveJob::Base._additional_serializers = []
+  end
+
+  test "can't serialize unknown object" do
+    assert_raises ActiveJob::SerializationError do
+      ActiveJob::Serializers.serialize @value_object
+    end
+  end
+
+  test "won't deserialize unknown hash" do
+    hash = { "_dummy_serializer" => 123, "_aj_symbol_keys" => [] }
+    assert ActiveJob::Serializers.deserialize(hash), hash.except("_aj_symbol_keys")
+  end
+
+  test "adds new serializer" do
+    ActiveJob::Base.add_serializers DummySerializer
+    assert ActiveJob::Base.serializers.include?(DummySerializer)
+  end
+
+  test "can't add serializer with the same key twice" do
+    ActiveJob::Base.add_serializers DummySerializer
+    assert_raises ArgumentError do
+      ActiveJob::Base.add_serializers DummySerializer
+    end
+  end
+end