Add tests for system testing

* Adds test case test
* Adds driver adapter test
* Adds tests for capybara seleium driver (testing the settings not
actually opening the browser to test capybara w/ selenium because that
would so so so slow)
* Adds tests for rack test driver
* Adds tests for generators

1 files changed, 19 insertions, 0 deletions

diff --git a/actionpack/test/system_testing/driver_adapter_test.rb b/actionpack/test/system_testing/driver_adapter_test.rb
new file mode 100644
index 0000000000..bfbeaa63a2
--- /dev/null
+++ b/actionpack/test/system_testing/driver_adapter_test.rb
@@ -0,0 +1,19 @@
+require 'abstract_unit'
+
+class DriverAdapterTest < ActiveSupport::TestCase
+  test 'only registered adapters are accepted' do
+    assert_raises(NameError) do
+      Rails::SystemTestCase.driver = :whatever
+    end
+
+    assert_nothing_raised do
+      Rails::SystemTestCase.driver = :capybara_selenium_driver
+    end
+  end
+
+  test 'settings can only be used for the appropriate adapter' do
+    assert_raises(ArgumentError) do
+      Rails::SystemTestCase.driver = SystemTesting::DriverAdapters::CapybaraRackTestDriver.new(something: 'test')
+    end
+  end
+end