Allow to pass context around serializers

test/unit/active_model/serializer/context_test.rb

@@ -0,0 +1,19 @@
+require 'test_helper'
+
+module ActiveModel
+  class Serializer
+    class ContextTest < ActiveModel::TestCase
+      def test_context_using_a_hash
+        serializer = UserSerializer.new(nil, context: { a: 1, b: 2 })
+        assert_equal(1, serializer.context[:a])
+        assert_equal(2, serializer.context[:b])
+      end
+
+      def test_context_using_an_object
+        serializer = UserSerializer.new(nil, context: Struct.new(:a, :b).new(1, 2))
+        assert_equal(1, serializer.context.a)
+        assert_equal(2, serializer.context.b)
+      end
+    end
+  end
+end