Add test for click_on

lib/capybara/spec/session/click_on_spec.rb

@@ -0,0 +1,15 @@
+# frozen_string_literal: true
+
+Capybara::SpecHelper.spec '#click_on' do
+  it 'should default to being an alias for #click_link_or_button' do
+    @session.visit('/form')
+    @session.click_on('awe123')
+    expect(extract_results(@session)['first_name']).to eq('John')
+  end
+
+  it 'should allow specifying a selector type' do
+    @session.visit('/form')
+    cbox = @session.click_on(:checkbox, 'form_terms_of_use')
+    expect(cbox).to be_checked
+  end
+end