Extend all test tasks to run against every configured test db (WIP)

test/application_system_test_case.rb

@@ -56,4 +56,8 @@ class ApplicationSystemTestCase < ActionDispatch::SystemTestCase
     #   find('a[disabled]').click
     # end
   #end
+
+  # TODO: override #test, creating per-adapter test methods running within
+  # #with_connection?
+  # define shards for test database
 end

test/controllers/users_controller_test.rb

@@ -2,7 +2,7 @@ require "test_helper"
 
 class UsersControllerTest < ActionDispatch::IntegrationTest
   setup do
-    @user = users(:one)
+    @user = users(:admin)
   end
 
   test "should get index" do

test/system/users_test.rb

@@ -6,6 +6,7 @@ class UsersTest < ApplicationSystemTestCase
   end
 
   test 'sign in' do
+    byebug
     visit root_url
     assert find_link(href: new_user_session_path)[:disabled]