Blowaway before hooks as well as after hooks to preserve order

lib/rspec/rails/example/system_example_group.rb

@@ -15,7 +15,11 @@ module SystemExampleGroup
       CHARS_TO_TRANSLATE = ['/', '.', ':', ',', "'", '"', " "].freeze
 
       # @private
-      module BlowAwayAfterTeardownHook
+      module BlowAwayTeardownHooks
+        # @private
+        def before_teardown
+        end
+
         # @private
         def after_teardown
         end
@@ -59,13 +63,18 @@ def app
           """.gsub(/\s+/, ' ').strip
         end
 
+        if ::Rails::VERSION::STRING >= '6.0'
+          original_before_teardown =
+            ::ActionDispatch::SystemTesting::TestHelpers::SetupAndTeardown.instance_method(:before_teardown)
+        end
+
         original_after_teardown =
           ::ActionDispatch::SystemTesting::TestHelpers::SetupAndTeardown.instance_method(:after_teardown)
 
         other.include ActionDispatch::IntegrationTest::Behavior
         other.include ::ActionDispatch::SystemTesting::TestHelpers::SetupAndTeardown
         other.include ::ActionDispatch::SystemTesting::TestHelpers::ScreenshotHelper
-        other.include BlowAwayAfterTeardownHook
+        other.include BlowAwayTeardownHooks
 
         attr_reader :driver
 
@@ -93,6 +102,9 @@ def driven_by(*args, &blk)
           orig_stdout = $stdout
           $stdout = StringIO.new
           begin
+            if ::Rails::VERSION::STRING >= '6.0'
+              original_before_teardown.bind(self).call
+            end
             original_after_teardown.bind(self).call
           ensure
             myio = $stdout

script/downgrade_bundler_on_old_rails

@@ -5,13 +5,14 @@
 set -e
 source script/functions.sh
 
-if ruby -e "exit(ENV['RAILS_VERSION'].to_f < 5)"; then
+if ruby -e "exit(ENV['RAILS_VERSION'].scan(/\d+\.\d+.\d+/)[0].to_f < 5)"; then
   # On Rails versions less than 5, Bundler 2.0 is not supported
   echo "Warning dowgrading to older version of Bundler"
-  gem uninstall -aIx bundler
+
+  gem uninstall -aIx bundler || echo "Warning error occured removing bundler via gem"
 
   # this only works on Ruby 2.3 which is luckily the version we need to fix
-  if is_ruby_23_plus; then
+  if is_ruby_23; then
     rvm @global do gem uninstall -aIx bundler
   fi
 

script/predicate_functions.sh

@@ -57,6 +57,14 @@ function is_mri_2plus {
   fi
 }
 
+function is_ruby_23 {
+  if ruby -e "exit(RUBY_VERSION.to_f == 2.3)"; then
+    return 0
+  else
+    return 1
+  fi
+}
+
 function is_ruby_23_plus {
   if ruby -e "exit(RUBY_VERSION.to_f >= 2.3)"; then
     return 0