bug#42115: ruby-bond fails its test suite, breaking ruby-iruby

[Maxim Cournoyer]

Hello,

The test suite of the ruby-bond package fails with 14 errors like the following:

Mocha::NotInitializedError: Mocha methods cannot be used outside the context of 
a test
        /tmp/guix-build-ruby-bond-0.5.1.drv-0/gem/test/bond_test.rb:9:in `block 
(3 levels) in <top (required)>': start - prints error if readline doesn't have 
all required methods
        
/gnu/store/9dshwx1qqrdyhsj2galh70g5l427p6f9-ruby-mocha-on-bacon-0.2.3/lib/ruby/vendor_ruby/gems/mocha-on-bacon-0.2.3/lib/mocha-on-bacon.rb:54:in
 `it'
        /tmp/guix-build-ruby-bond-0.5.1.drv-0/gem/test/bond_test.rb:10:in 
`block (2 levels) in <top (required)>'
        
/gnu/store/ch5i4pvyx1mfywpnby5xd7w0qs9qnvsm-ruby-bacon-bits-0.1.0/lib/ruby/vendor_ruby/gems/bacon-bits-0.1.0/lib/bacon/bits.rb:20:in
 `describe'
        /tmp/guix-build-ruby-bond-0.5.1.drv-0/gem/test/bond_test.rb:4:in `block 
in <top (required)>'
        /tmp/guix-build-ruby-bond-0.5.1.drv-0/gem/test/bond_test.rb:3:in `<top 
(required)>'
        
/gnu/store/cnwb1jaj8imfqwkw047jc20kh7vw3lwk-ruby-bacon-1.2.0/bin/.real/bacon:23:in
 `load'
        
/gnu/store/cnwb1jaj8imfqwkw047jc20kh7vw3lwk-ruby-bacon-1.2.0/bin/.real/bacon:23:in
        `<top (required)>

230 tests, 476 assertions, 0 failures, 14 errors

Tested with commit 8fdd0da49c81366a2061da35739cede3df107e15, but occurs
on master as well.

Maxim