1 files changed, 54 insertions, 0 deletions
diff --git a/activemodel/test/cases/nested_error_test.rb b/activemodel/test/cases/nested_error_test.rb
new file mode 100644
index 0000000000..5bad100da5
--- /dev/null
+++ b/activemodel/test/cases/nested_error_test.rb
@@ -0,0 +1,54 @@
+# frozen_string_literal: true
+
+require "cases/helper"
+require "active_model/nested_error"
+require "models/topic"
+require "models/reply"
+
+class ErrorTest < ActiveModel::TestCase
+  def test_initialize
+    topic = Topic.new
+    inner_error = ActiveModel::Error.new(topic, :title, :not_enough, count: 2)
+    reply = Reply.new
+    error = ActiveModel::NestedError.new(reply, inner_error)
+
+    assert_equal reply, error.base
+    assert_equal inner_error.attribute, error.attribute
+    assert_equal inner_error.type, error.type
+    assert_equal(inner_error.options, error.options)
+  end
+
+  test "initialize with overriding attribute and type" do
+    topic = Topic.new
+    inner_error = ActiveModel::Error.new(topic, :title, :not_enough, count: 2)
+    reply = Reply.new
+    error = ActiveModel::NestedError.new(reply, inner_error, attribute: :parent, type: :foo)
+
+    assert_equal reply, error.base
+    assert_equal :parent, error.attribute
+    assert_equal :foo, error.type
+    assert_equal(inner_error.options, error.options)
+  end
+
+  def test_message
+    topic = Topic.new(author_name: "Bruce")
+    inner_error = ActiveModel::Error.new(topic, :title, :not_enough, message: Proc.new { |model, options|
+      "not good enough for #{model.author_name}"
+    })
+    reply = Reply.new(author_name: "Mark")
+    error = ActiveModel::NestedError.new(reply, inner_error)
+
+    assert_equal "not good enough for Bruce", error.message
+  end
+
+  def test_full_message
+    topic = Topic.new(author_name: "Bruce")
+    inner_error = ActiveModel::Error.new(topic, :title, :not_enough, message: Proc.new { |model, options|
+      "not good enough for #{model.author_name}"
+    })
+    reply = Reply.new(author_name: "Mark")
+    error = ActiveModel::NestedError.new(reply, inner_error)
+
+    assert_equal "Title not good enough for Bruce", error.full_message
+  end
+end