* test/csv/test_csv.rb: use remove_const to reduce warnings. use Dir.tmpdir to
locate working files.
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* test: add test directory. Test::Unit aware testcases and needed files should
be located in this directory. dir/file name convention;
test/{module_name}/test_{testcase_name}.rb
test/{module_name}/{needed_files}
someday, someone will write testrunner which searches test_*.rb and
run testcases automatically
* test/csv/*: add testcase for lib/csv.rb.
0 lines of code changed in: