WordPress's install-wp-tests.sh using curl instead of wget and adding an optional drop_db parameter.

install-wp-tests.sh

#!/usr/bin/env bash

if [ $# -lt 3 ]; then
	echo "usage: $0 <db-name> <db-user> <db-pass> [db-host] [wp-version] [drop_db]"
	exit 1
fi

DB_NAME=$1
DB_USER=$2
DB_PASS=$3
DB_HOST=${4-localhost}
WP_VERSION=${5-latest}
DROP_DB=${6-false}

WP_TESTS_DIR=${WP_TESTS_DIR-/tmp/wordpress-tests-lib}
WP_CORE_DIR=${WP_CORE_DIR-/tmp/wordpress/}

set -ex

install_wp() {
	mkdir -p $WP_CORE_DIR

	local ARCHIVE_NAME="wordpress-$WP_VERSION"

	WP_ARCHIVE=/tmp/${ARCHIVE_NAME}.tar.gz

	if [ ! -f $WP_ARCHIVE ]
	then
		curl -sSL http://wordpress.org/${ARCHIVE_NAME}.tar.gz -o $WP_ARCHIVE
	fi

	tar --strip-components=1 -zxmf $WP_ARCHIVE -C $WP_CORE_DIR

	if [ ! -f $WP_CORE_DIR/wp-content/db.php ]
	then
		curl -sSL https://raw.github.com/markoheijnen/wp-mysqli/master/db.php -o $WP_CORE_DIR/wp-content/db.php
	fi
}

install_test_suite() {
	# portable in-place argument for both GNU sed and Mac OSX sed
	if [[ $(uname -s) == 'Darwin' ]]; then
		local ioption='-i .bak'
	else
		local ioption='-i'
	fi

	# set up testing suite
	mkdir -p $WP_TESTS_DIR
	cd $WP_TESTS_DIR

	if [ ! -d ./includes ]
	then
		svn co --quiet http://develop.svn.wordpress.org/trunk/tests/phpunit/includes/
	fi

	if [ ! -f wp-tests-config-sample.php ]
	then
		curl -sSL http://develop.svn.wordpress.org/trunk/wp-tests-config-sample.php -o wp-tests-config-sample.php
	fi
	cp wp-tests-config-sample.php wp-tests-config.php
	sed $ioption "s:dirname( __FILE__ ) . '/src/':'$WP_CORE_DIR':" wp-tests-config.php
	sed $ioption "s/youremptytestdbnamehere/$DB_NAME/" wp-tests-config.php
	sed $ioption "s/yourusernamehere/$DB_USER/" wp-tests-config.php
	sed $ioption "s/yourpasswordhere/$DB_PASS/" wp-tests-config.php
	sed $ioption "s|localhost|${DB_HOST}|" wp-tests-config.php
}

install_db() {
	# parse DB_HOST for port or socket references
	local PARTS=(${DB_HOST//\:/ })
	local DB_HOSTNAME=${PARTS[0]};
	local DB_SOCK_OR_PORT=${PARTS[1]};
	local EXTRA=""

	if ! [ -z $DB_HOSTNAME ] ; then
		if [[ "$DB_SOCK_OR_PORT" =~ ^[0-9]+$ ]] ; then
			EXTRA=" --host=$DB_HOSTNAME --port=$DB_SOCK_OR_PORT --protocol=tcp"
		elif ! [ -z $DB_SOCK_OR_PORT ] ; then
			EXTRA=" --socket=$DB_SOCK_OR_PORT"
		elif ! [ -z $DB_HOSTNAME ] ; then
			EXTRA=" --host=$DB_HOSTNAME --protocol=tcp"
		fi
	fi

	if [ 'true' == ${DROP_DB} ]; then
		# drop database
		mysqladmin drop $DB_NAME --user="$DB_USER" --password="$DB_PASS"$EXTRA --force
	fi

	# create database
	mysqladmin create $DB_NAME --user="$DB_USER" --password="$DB_PASS"$EXTRA
}

install_wp
install_test_suite
install_db