Refactor REST API test script into a npm test framework

The script can now be used to run an arbitrary set of Node.js tests as
long as they define the `test` npm target. Refactored REST API tests to
fit into this framework.

test/docker-compose.yml

@@ -0,0 +1,37 @@
+version: '2'
+services:
+    server1:
+        image: mariadb:10.1
+        network_mode: "host"
+        environment:
+            MYSQL_ALLOW_EMPTY_PASSWORD: Y
+        volumes:
+            - ./sql/master:/docker-entrypoint-initdb.d
+        command: mysqld --log-bin=binlog --binlog-format=ROW --server-id=3000 --port=3000 --log-slave-updates
+
+    server2:
+        image: mariadb:10.1
+        network_mode: "host"
+        environment:
+            MYSQL_ALLOW_EMPTY_PASSWORD: Y
+        volumes:
+            - ./sql/slave:/docker-entrypoint-initdb.d
+        command: mysqld --log-bin=binlog --binlog-format=ROW --server-id=3001 --port=3001 --log-slave-updates
+
+    server3:
+        image: mariadb:10.1
+        network_mode: "host"
+        environment:
+            MYSQL_ALLOW_EMPTY_PASSWORD: Y
+        volumes:
+            - ./sql/slave:/docker-entrypoint-initdb.d
+        command: mysqld --log-bin=binlog --binlog-format=ROW --server-id=3002 --port=3002 --log-slave-updates
+
+    server4:
+        image: mariadb:10.1
+        network_mode: "host"
+        environment:
+            MYSQL_ALLOW_EMPTY_PASSWORD: Y
+        volumes:
+            - ./sql/slave:/docker-entrypoint-initdb.d
+        command: mysqld --log-bin=binlog --binlog-format=ROW --server-id=3003 --port=3003 --log-slave-updates

test/run_npm_test.sh

@@ -0,0 +1,92 @@
+#!/bin/bash
+
+# This script builds and installs MaxScale, starts a MariaDB cluster and runs any
+# tests that define a `npm test` target
+#
+# This is definitely not the most efficient way to test the binaries but it's a
+# guaranteed method of creating a consistent and "safe" testing environment.
+
+if [ $# -lt 3 ]
+then
+    echo "USAGE: $0 <MaxScale sources> <test sources> <test directory>"
+    exit 1
+fi
+
+srcdir=$1
+testsrc=$2
+testdir=$3
+
+maxscaledir=$PWD/maxscale_test/
+
+# Create the test directory
+mkdir -p $testdir && cd $testdir
+
+# Copy the common test files (docker-compose.yml etc.)
+cp -t $testdir -r $srcdir/test/*
+
+# Copy test sources to test workspace
+cp -t $testdir -r $testsrc/*
+
+# Bring MariaDB servers up, this is an asynchronous process
+docker-compose up -d || exit 1
+
+# Install dependencies
+npm install
+
+mkdir -p $maxscaledir && cd $maxscaledir
+
+# Configure and install MaxScale
+cmake $srcdir -DCMAKE_BUILD_TYPE=Debug \
+      -DCMAKE_INSTALL_PREFIX=$maxscaledir \
+      -DBUILD_TESTS=Y \
+      -DMAXSCALE_VARDIR=$maxscaledir \
+      -DCMAKE_BUILD_TYPE=Debug \
+      -DWITH_SCRIPTS=N \
+      -DWITH_MAXSCALE_CNF=N \
+      -DBUILD_CDC=Y \
+      -DTARGET_COMPONENT=all \
+      -DDEFAULT_MODULE_CONFIGDIR=$maxscaledir \
+      -DDEFAULT_ADMIN_USER=`whoami`
+
+make install
+
+# Create required directories (we could run the postinst script but it's a bit too invasive)
+mkdir -p $maxscaledir/lib64/maxscale
+mkdir -p $maxscaledir/bin
+mkdir -p $maxscaledir/share/maxscale
+mkdir -p $maxscaledir/share/doc/MaxScale/maxscale
+mkdir -p $maxscaledir/log/maxscale
+mkdir -p $maxscaledir/lib/maxscale
+mkdir -p $maxscaledir/cache/maxscale
+mkdir -p $maxscaledir/run/maxscale
+chmod 0755 $maxscaledir/log/maxscale
+chmod 0755 $maxscaledir/lib/maxscale
+chmod 0755 $maxscaledir/cache/maxscale
+chmod 0755 $maxscaledir/run/maxscale
+
+# Go to the test directory
+cd $testdir
+
+# This variable is used to start and stop MaxScale before each test
+export MAXSCALE_DIR=$maxscaledir
+
+# Wait until the servers are up
+for node in server1 server2 server3 server4
+do
+    printf "Waiting for $node to start... "
+    for ((i=0; i<60; i++))
+    do
+        docker-compose exec $node mysql -umaxuser -pmaxpwd -e "select 1" >& /dev/null && break
+        sleep 1
+    done
+    echo "Done!"
+done
+
+# Run tests
+npm test
+rval=$?
+
+# Stop MariaDB servers
+docker-compose down -v
+
+exit $rval

test/sql/master/users.sql

@@ -0,0 +1,14 @@
+RESET MASTER;
+CREATE DATABASE test;
+
+CREATE USER 'maxuser'@'127.0.0.1' IDENTIFIED BY 'maxpwd';
+CREATE USER 'maxuser'@'%' IDENTIFIED BY 'maxpwd';
+GRANT ALL ON *.* TO 'maxuser'@'127.0.0.1' WITH GRANT OPTION;
+GRANT ALL ON *.* TO 'maxuser'@'%' WITH GRANT OPTION;
+
+CREATE USER 'skysql'@'127.0.0.1' IDENTIFIED BY 'skysql';
+CREATE USER 'skysql'@'%' IDENTIFIED BY 'skysql';
+GRANT ALL ON *.* TO 'skysql'@'127.0.0.1' WITH GRANT OPTION;
+GRANT ALL ON *.* TO 'skysql'@'%' WITH GRANT OPTION;
+
+SET GLOBAL max_connections=10000;

test/sql/slave/replication.sql

@@ -0,0 +1,3 @@
+CHANGE MASTER TO MASTER_HOST='127.0.0.1', MASTER_PORT=3000, MASTER_USER='maxuser', MASTER_PASSWORD='maxpwd', MASTER_LOG_POS=4, MASTER_LOG_FILE='binlog.000001', MASTER_CONNECT_RETRY=1;
+START SLAVE;
+SET GLOBAL max_connections=10000;