assert_redirected_to and assert_template should not both pass

The integration unit test:

require 'test_helper'

class TransactionImportsTest < ActionController::IntegrationTest
  test "should fail" do
    get '/transaction_imports/new'
    post '/transaction_imports' # rendered template is still "new" here!
    assert_redirected_to(transaction_imports_url)
    assert_template('new')
  end
end

passes, while it is expected to fail because the last response is redirect.

The 'post', 'get' etc should create a new request (only preserving the session info, cookies etc) to ensure the isolation between requests.

Originated from RSpec issue