first import

sites/all/modules/drush/tests/README.txt

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+Drush's test suite based on phpunit (http://www.phpunit.de/).
+
+Usage
+--------
+- Install PHPUnit [*]
+- Optional. Copy phpunit.xml.dist to phpunit.xml and customize if needed.
+- From the /tests subdirectory, run `phpunit .` or `runner.php .`
+
+Advanced usage
+---------
+- Run only tests matching a regex: phpunit --filter=testVersionString .
+- XML results: phpunit --filter=testVersionString --log-junit results.xml .
+
+Notes
+----------
+- I have run tests within Netbeans and it works.
+- Speedup downloads with Squid as forward proxy - http://reluctanthacker.rollett.org/node/114.
+
+
+
+[*] Install PHPUnit:
+
+Drush requires PHPUnit 3.5 or later; installing with PEAR is easiest.
+ 
+On Linux:
+---------
+
+  sudo apt-get install php5-curl php-pear
+  sudo pear upgrade --force PEAR
+  sudo pear channel-discover pear.phpunit.de
+  sudo pear channel-discover components.ez.no
+  sudo pear channel-discover pear.symfony-project.com
+  sudo pear install --alldeps phpunit/PHPUnit
+
+On Windows:
+-----------
+
+Download and save from go-pear.phar http://pear.php.net/go-pear.phar
+
+  php -q go-pear.phar
+  pear channel-discover pear.phpunit.de
+  pear channel-discover components.ez.no
+  pear channel-discover pear.symfony-project.com
+  pear install --alldeps phpunit/PHPUnit