(https://github.com/ruby/irb/pull/442)
* Add test_in_isolation task to run tests in isolation
This simulates how tests are run in Ruby CI and can detect some issues
before they're merged and break Ruby CI later.
* Run test_in_isolation task on CI
* Fix TestRaiseNoBacktraceException's setup
51f23c58b0
conveniently
(https://github.com/ruby/irb/pull/429)
* Create a base TestIRB::TestCase class
* Save/restore encodings for tests that initializes InputMethod classes
Because `RelineInputMethod#initializes` calls `set_encoding`, which
changes stdio/out/err and Encoding's default encoding values, we need to
make sure any test that directly or indirectly (e.g. through Context)
initializes `RelineInputMethod` restores encodings.
`ReadlineInputMethod` also changes encodings but currently no tests
cover it.
* Remove unnecessary TestHelper module
Since we now have a base TestCase, without_rdoc can just live there.
c2874ec121
... for the output of assert_in_out_err.
This will fix the following failure on many CI machines
20210511T030005Z.fail.html.gz
```
1) Failure:
TestIRB::TestRaiseNoBacktraceException#test_raise_exception_with_different_encoding_containing_invalid_byte_sequence [/home/chkbuild/chkbuild/tmp/build/20210511T030005Z/ruby/test/irb/test_raise_no_backtrace_exception.rb:41]:
pid 221531 exit 0.
1. [1/2] Assertion for "stdout"
| invalid byte sequence in US-ASCII.
```
When you change this to true, you may need to add more tests.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@53141 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
