Fix ActiveModel::Errors #keys, #values

Before:
  person.errors.keys    # => []
  person.errors.values  # => []
  person.errors[:name]  # => []
  person.errors.keys    # => [:name]
  person.errors.values  # => [[]]

After:
  person.errors.keys   # => []
  person.errors.values # => []
  person.errors[:name] # => []
  person.errors.keys   # => []
  person.errors.values # => []

Related to #23468

1 files changed, 16 insertions, 0 deletions

diff --git a/activemodel/test/cases/errors_test.rb b/activemodel/test/cases/errors_test.rb
index 0872084cf5..43aee5a814 100644
--- a/activemodel/test/cases/errors_test.rb
+++ b/activemodel/test/cases/errors_test.rb
@@ -99,6 +99,14 @@ class ErrorsTest < ActiveModel::TestCase
     assert_equal ["omg", "zomg"], errors.values
   end
 
+  test "values returns an empty array after try to get a message only" do
+    errors = ActiveModel::Errors.new(self)
+    errors.messages[:foo]
+    errors.messages[:baz]
+
+    assert_equal [], errors.values
+  end
+
   test "keys returns the error keys" do
     errors = ActiveModel::Errors.new(self)
     errors.messages[:foo] << "omg"
@@ -107,6 +115,14 @@ class ErrorsTest < ActiveModel::TestCase
     assert_equal [:foo, :baz], errors.keys
   end
 
+  test "keys returns an empty array after try to get a message only" do
+    errors = ActiveModel::Errors.new(self)
+    errors.messages[:foo]
+    errors.messages[:baz]
+
+    assert_equal [], errors.keys
+  end
+
   test "detecting whether there are errors with empty?, blank?, include?" do
     person = Person.new
     person.errors[:foo]