Add additional tests for `RequestPageManager` and `PageMiddleware`.
Add additional tests for `RequestPageManager` and `PageMiddleware`.

dan-gamble/cms,jamesfoley/cms,lewiscollard/cms,jamesfoley/cms,dan-gamble/cms,jamesfoley/cms,dan-gamble/cms,jamesfoley/cms,danielsamuels/cms,lewiscollard/cms,lewiscollard/cms,danielsamuels/cms,danielsamuels/cms