Ticket #42811: 42811.diff

.travis.yml

@@ -42 +42 @@
   fi
 - |
   if [[ "$WP_TRAVIS_OBJECT_CACHE" == "true" ]]; then
     cp tests/phpunit/includes/object-cache.php src/wp-content/object-cache.php
     echo "extension = memcached.so" >> ~/.phpenv/versions/$(phpenv version-name)/etc/php.ini
   fi
 before_script:
 - |
   # Remove Xdebug for a huge performance increase:
   if [ -f ~/.phpenv/versions/$(phpenv version-name)/etc/conf.d/xdebug.ini ]; then
     phpenv config-rm xdebug.ini
   else
     echo "xdebug.ini does not exist"
   fi
 - |
+  # Force the MySQL extension for PHP 5.2
+  if [[ ${TRAVIS_PHP_VERSION:0:3} == "5.2" ]]; then
+    echo "define( 'WP_USE_EXT_MYSQL', true );" >> wp-tests-config.php
+  fi
+- |
   # Export Composer's global bin dir to PATH, but not on PHP 5.2:
   if [[ ${TRAVIS_PHP_VERSION:0:3} != "5.2" ]]; then
     composer config --list --global
     export PATH=`composer config --list --global | grep '\[home\]' | { read a; echo "${a#* }/vendor/bin:$PATH"; }`
   fi
 - |
   # Install the specified version of PHPUnit depending on the PHP version:
   if [[ "$WP_TRAVISCI" == "travis:phpunit" ]]; then
     case "$TRAVIS_PHP_VERSION" in
       7.2|7.1|7.0|nightly)
         echo "Using PHPUnit 6.x"
         composer global require "phpunit/phpunit:^6"
         ;;
       5.6|5.5|5.4|5.3)
         echo "Using PHPUnit 4.x"