1 files changed, 28 insertions, 0 deletions
diff --git a/activerecord/test/cases/enum_test.rb b/activerecord/test/cases/enum_test.rb
index 867ce7082b..ae0ce195b3 100644
--- a/activerecord/test/cases/enum_test.rb
+++ b/activerecord/test/cases/enum_test.rb
@@ -44,6 +44,11 @@ class EnumTest < ActiveRecord::TestCase
     assert_equal books(:rfr), authors(:david).unpublished_books.first
   end
 
+  test "find via negative scope" do
+    assert Book.not_published.exclude?(@book)
+    assert Book.not_proposed.include?(@book)
+  end
+
   test "find via where with values" do
     published, written = Book.statuses[:published], Book.statuses[:written]
 
@@ -438,6 +443,20 @@ class EnumTest < ActiveRecord::TestCase
     assert_equal ["drafted", "uploaded"], book2.status_change
   end
 
+  test "attempting to modify enum raises error" do
+    e = assert_raises(RuntimeError) do
+      Book.statuses["bad_enum"] = 40
+    end
+
+    assert_match(/can't modify frozen/, e.message)
+
+    e = assert_raises(RuntimeError) do
+      Book.statuses.delete("published")
+    end
+
+    assert_match(/can't modify frozen/, e.message)
+  end
+
   test "declare multiple enums at a time" do
     klass = Class.new(ActiveRecord::Base) do
       self.table_name = "books"
@@ -537,4 +556,13 @@ class EnumTest < ActiveRecord::TestCase
   test "data type of Enum type" do
     assert_equal :integer, Book.type_for_attribute("status").type
   end
+
+  test "scopes can be disabled" do
+    klass = Class.new(ActiveRecord::Base) do
+      self.table_name = "books"
+      enum status: [:proposed, :written], _scopes: false
+    end
+
+    assert_raises(NoMethodError) { klass.proposed }
+  end
 end