Add a new QA::ElementWithPattern cop

This cop forbids the use of `element :foo, 'pattern'` and
`element :bar, /pattern/` in QA files.

Signed-off-by: Rémy Coutable <remy@rymai.me>

1 files changed, 50 insertions, 0 deletions

diff --git a/spec/rubocop/cop/qa/element_with_pattern_spec.rb b/spec/rubocop/cop/qa/element_with_pattern_spec.rb
new file mode 100644
index 00000000000..c5beb40f9fd
--- /dev/null
+++ b/spec/rubocop/cop/qa/element_with_pattern_spec.rb
@@ -0,0 +1,50 @@
+require 'spec_helper'
+
+require 'rubocop'
+require 'rubocop/rspec/support'
+
+require_relative '../../../../rubocop/cop/qa/element_with_pattern'
+
+describe RuboCop::Cop::QA::ElementWithPattern do
+  include CopHelper
+
+  let(:source_file) { 'qa/page.rb' }
+
+  subject(:cop) { described_class.new }
+
+  context 'in a QA file' do
+    before do
+      allow(cop).to receive(:in_qa_file?).and_return(true)
+    end
+
+    it "registers an offense for elements with a pattern" do
+      expect_offense(<<-RUBY)
+      view 'app/views/shared/groups/_search_form.html.haml' do
+        element :groups_filter, 'search_field_tag :filter'
+                                ^^^^^^^^^^^^^^^^^^^^^^^^^^ Don't use a pattern for element, create a corresponding `qa-groups-filter` instead.
+        element :groups_filter_placeholder, /Search by name/
+                                            ^^^^^^^^^^^^^^^^ Don't use a pattern for element, create a corresponding `qa-groups-filter-placeholder` instead.
+      end
+      RUBY
+    end
+
+    it "does not register an offense for element without a pattern" do
+      expect_no_offenses(<<-RUBY)
+      view 'app/views/shared/groups/_search_form.html.haml' do
+        element :groups_filter
+        element :groups_filter_placeholder
+      end
+      RUBY
+    end
+  end
+
+  context 'outside of a migration spec file' do
+    it "does not register an offense" do
+      expect_no_offenses(<<-RUBY)
+        describe 'foo' do
+          let(:user) { create(:user) }
+        end
+      RUBY
+    end
+  end
+end