1 files changed, 85 insertions, 0 deletions
diff --git a/activerecord/test/cases/validations/i18n_validation_test.rb b/activerecord/test/cases/validations/i18n_validation_test.rb
new file mode 100644
index 0000000000..b7c52ea18c
--- /dev/null
+++ b/activerecord/test/cases/validations/i18n_validation_test.rb
@@ -0,0 +1,85 @@
+# frozen_string_literal: true
+
+require "cases/helper"
+require "models/topic"
+require "models/reply"
+
+class I18nValidationTest < ActiveRecord::TestCase
+  repair_validations(Topic, Reply)
+
+  def setup
+    repair_validations(Topic, Reply)
+    Reply.validates_presence_of(:title)
+    @topic = Topic.new
+    @old_load_path, @old_backend = I18n.load_path.dup, I18n.backend
+    I18n.load_path.clear
+    I18n.backend = I18n::Backend::Simple.new
+    I18n.backend.store_translations("en", errors: { messages: { custom: nil } })
+  end
+
+  teardown do
+    I18n.load_path.replace @old_load_path
+    I18n.backend = @old_backend
+  end
+
+  def unique_topic
+    @unique ||= Topic.create title: "unique!"
+  end
+
+  def replied_topic
+    @replied_topic ||= begin
+      topic = Topic.create(title: "topic")
+      topic.replies << Reply.new
+      topic
+    end
+  end
+
+  # A set of common cases for ActiveModel::Validations message generation that
+  # are used to generate tests to keep things DRY
+  #
+  COMMON_CASES = [
+    # [ case,                              validation_options,            generate_message_options]
+    [ "given no options",                  {},                            {}],
+    [ "given custom message",              { message: "custom" },        { message: "custom" }],
+    [ "given if condition",                { if: lambda { true } },  {}],
+    [ "given unless condition",            { unless: lambda { false } }, {}],
+    [ "given option that is not reserved", { format: "jpg" },            { format: "jpg" }],
+    [ "given on condition",                { on: [:create, :update] },     {}]
+  ]
+
+  COMMON_CASES.each do |name, validation_options, generate_message_options|
+    test "validates_uniqueness_of on generated message #{name}" do
+      Topic.validates_uniqueness_of :title, validation_options
+      @topic.title = unique_topic.title
+      assert_called_with(@topic.errors, :generate_message, [:title, :taken, generate_message_options.merge(value: "unique!")]) do
+        @topic.valid?
+      end
+    end
+  end
+
+  COMMON_CASES.each do |name, validation_options, generate_message_options|
+    test "validates_associated on generated message #{name}" do
+      Topic.validates_associated :replies, validation_options
+      assert_called_with(replied_topic.errors, :generate_message, [:replies, :invalid, generate_message_options.merge(value: replied_topic.replies)]) do
+        replied_topic.save
+      end
+    end
+  end
+
+  def test_validates_associated_finds_custom_model_key_translation
+    I18n.backend.store_translations "en", activerecord: { errors: { models: { topic: { attributes: { replies: { invalid: "custom message" } } } } } }
+    I18n.backend.store_translations "en", activerecord: { errors: { messages: { invalid: "global message" } } }
+
+    Topic.validates_associated :replies
+    replied_topic.valid?
+    assert_equal ["custom message"], replied_topic.errors[:replies].uniq
+  end
+
+  def test_validates_associated_finds_global_default_translation
+    I18n.backend.store_translations "en", activerecord: { errors: { messages: { invalid: "global message" } } }
+
+    Topic.validates_associated :replies
+    replied_topic.valid?
+    assert_equal ["global message"], replied_topic.errors[:replies]
+  end
+end