test: Fix NameError: uninitialized constant REXML::Parsers::PullParser

[junaruga]

This commit fixes the following NameError when running only specific test file test/parse/test_character_reference.rb.

$ ruby test/parse/test_character_reference.rb -v
Loaded suite test/parse/test_character_reference
Started
REXMLTests::TestParseCharacterReference:
  test_hex_precedding_zero:           E
===========================================================================================
Error: test_hex_precedding_zero(REXMLTests::TestParseCharacterReference): NameError: uninitialized constant REXML::Parsers::PullParser
test/parse/test_character_reference.rb:18:in 'REXMLTests::TestParseCharacterReference#test_hex_precedding_zero'
===========================================================================================
: (0.001470)
  test_linear_performance_many_preceding_zeros:       .: (0.033970)

Finished in 0.036068018 seconds.
-------------------------------------------------------------------------------------------
2 tests, 15 assertions, 0 failures, 1 errors, 0 pendings, 0 omissions, 0 notifications
50% passed
-------------------------------------------------------------------------------------------
55.45 tests/s, 415.88 assertions/s

[naitoh]

I think this correction is good. 👍

@kou

Does REXML support operation with the following test commands?

$ ruby test/parse/test_character_reference.rb -v

The documentation seems to only describe the rake test testing method.

rexml/README.md

Line 47 in 963ccdf

After checking out the repo, run `rake test` to run the tests.

[kou]

This usage isn't actively supported. test/run.rb --location test/parse/test_character_reference.rb or something is preferred.

If we want to support this usage, all our tests should include test/helper.rb and it cares about all preparations.

[kou]

Anyway, I merge this.

[naitoh]

This usage isn't actively supported. test/run.rb --location test/parse/test_character_reference.rb or something is preferred.

If we want to support this usage, all our tests should include test/helper.rb and it cares about all preparations.

I understood.
Thanks.