TarReader#each previously implemented a partial version of seek.
This code moved to Entry#seek for use from TarReader#each.
Entry#close now returns nil instead of true, like IO#close.
Closing an Entry now seeks to the end of the Entry, seeking past
any remaining zero byte tar file padding and moving the io to the
correcty position to read the next file in the archive.
Uses seek for Entry#rewind and #pos=, fixing the tar->gzip->tar nested
rewind that would break previous to this change.
Add Entry.open that behaves more like File.open.
f5149565d5
This changes "test/rubygems/test_case.rb" to "test/rubygems/helper.rb",
and "test/rubygems/test_utilities.rb" to "test/rubygems/utilities.rb".
The two files are a helper for tests, not test files. However, a file
starting with "test_" prefix is handled as a test file directly loaded
by test-unit because Rakefile specifies:
```
t.test_files = FileList['test/**/test_*.rb']
```
Directly loading test/rubygems/test_utilities.rb caused "uninitialized
constant Gem::TestCase". This issue was fixed by
59c6820971, but the fix caused a
"circular require" warning because test_utilities.rb and test_case.rb
are now requiring each other.
Anyway, adding "test_" prefix to a test helper file is confusing, so
this changeset reverts the fix and solve the issue by renaming them.
6460e018df
