Added test for RichTextAreaInput

test/inputs/rich_text_area_input_test.rb

@@ -0,0 +1,15 @@
+# frozen_string_literal: true
+# encoding: UTF-8
+require 'test_helper'
+
+class RichTextAreaInputTest < ActionView::TestCase
+  test 'input generates a text area for text attributes' do
+    with_input_for @user, :description, :text
+    assert_select 'textarea.text#user_description'
+  end
+
+  test 'input generates a text area for text attributes that accept placeholder' do
+    with_input_for @user, :description, :text, placeholder: 'Put in some text'
+    assert_select 'textarea.text[placeholder="Put in some text"]'
+  end
+end