[DRE-maint] Bug#912253: ruby-protected-attributes: FTBFS reliably (failing tests)

[Helmut Grohne]

Source: ruby-protected-attributes
Version: 1.1.3-2
Severity: serious
Tags: ftbfs

ruby-protected-attributes fails to build from source reliably now. On my
system as well as on reproducible builds, I consistently see the very
same three failures:

| Finished in 0.447334s, 453.7994 runs/s, 1629.6540 assertions/s.
| 
|   1) Error:
| AccessibleParamsWrapperTest#test_accessible_wrapped_keys_from_matching_model:
| Mocha::NotInitializedError: Mocha methods cannot be used outside the context of a test
|     /<<PKGBUILDDIR>>/test/accessible_params_wrapper_test.rb:67:in `test_accessible_wrapped_keys_from_matching_model'
| 
|   2) Error:
| AccessibleParamsWrapperTest#test_derived_wrapped_keys_from_matching_model:
| Mocha::NotInitializedError: Mocha methods cannot be used outside the context of a test
|     /<<PKGBUILDDIR>>/test/accessible_params_wrapper_test.rb:41:in `test_derived_wrapped_keys_from_matching_model'
| 
|   3) Error:
| AccessibleParamsWrapperTest#test_derived_wrapped_keys_from_specified_model:
| Mocha::NotInitializedError: Mocha methods cannot be used outside the context of a test
|     /<<PKGBUILDDIR>>/test/accessible_params_wrapper_test.rb:54:in `block in test_derived_wrapped_keys_from_specified_model'
|     /<<PKGBUILDDIR>>/test/accessible_params_wrapper_test.rb:9:in `with_default_wrapper_options'
|     /<<PKGBUILDDIR>>/test/accessible_params_wrapper_test.rb:53:in `test_derived_wrapped_keys_from_specified_model'
| 
| 203 runs, 729 assertions, 0 failures, 3 errors, 0 skips
| rake aborted!
| Command failed with status (1): [ruby -w -I"test"  "/usr/lib/ruby/vendor_ruby/rake/rake_test_loader.rb" "test/accessible_params_wrapper_test.rb" "test/attribute_sanitization_test.rb" "test/mass_assignment_security/black_list_test.rb" "test/mass_assignment_security/permission_set_test.rb" "test/mass_assignment_security/sanitizer_test.rb" "test/mass_assignment_security/strong_parameters_fallback_test.rb" "test/mass_assignment_security/white_list_test.rb" "test/mass_assignment_security_test.rb" "test/test_helper.rb" -v]
| 
| Tasks: TOP => default
| (See full trace by running task with --trace)
| ERROR: Test "ruby2.5" failed. Exiting.
| dh_auto_install: dh_ruby --install /<<PKGBUILDDIR>>/debian/ruby-protected-attributes returned exit code 1
| make: *** [debian/rules:6: binary] Error 1
| dpkg-buildpackage: error: fakeroot debian/rules binary subprocess returned exit status 2

Helmut