1 files changed, 61 insertions, 0 deletions
diff --git a/activesupport/test/json/encoding_test.rb b/activesupport/test/json/encoding_test.rb
index 856ca75cbc..00f43be6d4 100644
--- a/activesupport/test/json/encoding_test.rb
+++ b/activesupport/test/json/encoding_test.rb
@@ -32,6 +32,25 @@ class TestJSONEncoding < ActiveSupport::TestCase
     end
   end
 
+  class OptionsTest
+    def as_json(options = :default)
+      options
+    end
+  end
+
+  class HashWithAsJson < Hash
+    attr_accessor :as_json_called
+
+    def initialize(*)
+      super
+    end
+
+    def as_json(options={})
+      @as_json_called = true
+      super
+    end
+  end
+
   TrueTests     = [[ true,  %(true)  ]]
   FalseTests    = [[ false, %(false) ]]
   NilTests      = [[ nil,   %(null)  ]]
@@ -319,6 +338,16 @@ class TestJSONEncoding < ActiveSupport::TestCase
                   "other_hash" => {"foo"=>"other_foo","test"=>"other_test"}}, ActiveSupport::JSON.decode(hash.to_json))
   end
 
+  def test_hash_as_json_without_options
+    json = { foo: OptionsTest.new }.as_json
+    assert_equal({"foo" => :default}, json)
+  end
+
+  def test_array_as_json_without_options
+    json = [ OptionsTest.new ].as_json
+    assert_equal([:default], json)
+  end
+
   def test_struct_encoding
     Struct.new('UserNameAndEmail', :name, :email)
     Struct.new('UserNameAndDate', :name, :date)
@@ -367,6 +396,38 @@ class TestJSONEncoding < ActiveSupport::TestCase
     assert_equal false, false.as_json
   end
 
+  def test_json_gem_dump_by_passing_active_support_encoder
+    h = HashWithAsJson.new
+    h[:foo] = "hello"
+    h[:bar] = "world"
+
+    assert_equal %({"foo":"hello","bar":"world"}), JSON.dump(h)
+    assert_nil h.as_json_called
+  end
+
+  def test_json_gem_generate_by_passing_active_support_encoder
+    h = HashWithAsJson.new
+    h[:foo] = "hello"
+    h[:bar] = "world"
+
+    assert_equal %({"foo":"hello","bar":"world"}), JSON.generate(h)
+    assert_nil h.as_json_called
+  end
+
+  def test_json_gem_pretty_generate_by_passing_active_support_encoder
+    h = HashWithAsJson.new
+    h[:foo] = "hello"
+    h[:bar] = "world"
+
+    assert_equal <<EXPECTED.chomp, JSON.pretty_generate(h)
+{
+  "foo": "hello",
+  "bar": "world"
+}
+EXPECTED
+    assert_nil h.as_json_called
+  end
+
   protected
 
     def object_keys(json_object)