test boolean and number json param parsing
Merge pull request #13818 from arthurnn/small_test_case

test boolean and number json param parsing
unify param.require tests
Merge pull request #13819 from arthurnn/one_require_test

unify param.require tests
Remove unused assignment to fix warnings in enum test.
Merge pull request #13821 from vipulnsward/remove-assignment-in-test

Remove unused assignment to fix warnings in enum test.
Fix `rake routes` error when `Rails::Engine` with empty routes is mounted; fixes rails/rails#13810

Squash
Merge pull request #13811 from mdesantis/issue-13810

Fixes #13810 `rake routes` error when mount `Rails::Engine` with empty routes