1 files changed, 53 insertions, 0 deletions
diff --git a/activemodel/test/cases/errors_test.rb b/activemodel/test/cases/errors_test.rb
index 42d0365521..17dbb817d0 100644
--- a/activemodel/test/cases/errors_test.rb
+++ b/activemodel/test/cases/errors_test.rb
@@ -59,6 +59,17 @@ class ErrorsTest < ActiveModel::TestCase
     assert_equal false, errors.has_key?(:name), 'errors should not have key :name'
   end
 
+  def test_key?
+    errors = ActiveModel::Errors.new(self)
+    errors[:foo] = 'omg'
+    assert_equal true, errors.key?(:foo), 'errors should have key :foo'
+  end
+
+  def test_no_key
+    errors = ActiveModel::Errors.new(self)
+    assert_equal false, errors.key?(:name), 'errors should not have key :name'
+  end
+
   test "clear errors" do
     person = Person.new
     person.validate!
@@ -312,4 +323,46 @@ class ErrorsTest < ActiveModel::TestCase
     person.errors.expects(:generate_message).with(:name, :blank, { message: 'custom' })
     person.errors.add_on_blank :name, message: 'custom'
   end
+
+  test "details returns added error detail" do
+    person = Person.new
+    person.errors.add(:name, :invalid)
+    assert_equal({ name: [{ error: :invalid }] }, person.errors.details)
+  end
+
+  test "details returns added error detail with custom option" do
+    person = Person.new
+    person.errors.add(:name, :greater_than, count: 5)
+    assert_equal({ name: [{ error: :greater_than, count: 5 }] }, person.errors.details)
+  end
+
+  test "details do not include message option" do
+    person = Person.new
+    person.errors.add(:name, :invalid, message: "is bad")
+    assert_equal({ name: [{ error: :invalid }] }, person.errors.details)
+  end
+
+  test "dup duplicates details" do
+    errors = ActiveModel::Errors.new(Person.new)
+    errors.add(:name, :invalid)
+    errors_dup = errors.dup
+    errors_dup.add(:name, :taken)
+    assert_not_equal errors_dup.details, errors.details
+  end
+
+  test "delete removes details on given attribute" do
+    errors = ActiveModel::Errors.new(Person.new)
+    errors.add(:name, :invalid)
+    errors.delete(:name)
+    assert_empty errors.details[:name]
+  end
+
+  test "clear removes details" do
+    person = Person.new
+    person.errors.add(:name, :invalid)
+
+    assert_equal 1, person.errors.details.count
+    person.errors.clear
+    assert person.errors.details.empty?
+  end
 end