MXS-1220: Make REST API locally testable

The `test_rest_api` make target creates a discardable installation of
MaxScale which is used to launch a local instance of MaxScale. This local
instance is then used to test the REST API.

This is definitely not an efficient way to test the MaxScale but it allows
local testing without virtual machines or containers.

server/core/test/CMakeLists.txt

@@ -89,3 +89,5 @@ if(TEST_FEEDBACK)
   add_test(TestFeedback testfeedback)
   set_tests_properties(TestFeedback PROPERTIES TIMEOUT 30)
 endif()
+
+add_subdirectory(rest-api)

server/core/test/rest-api/CMakeLists.txt

@@ -0,0 +1,3 @@
+add_custom_target(test_rest_api
+  COMMAND ${CMAKE_CURRENT_SOURCE_DIR}/test_rest_api.sh ${CMAKE_SOURCE_DIR}
+  WORKING_DIRECTORY ${CMAKE_BINARY_DIR})

server/core/test/rest-api/test_rest_api.sh

@@ -0,0 +1,73 @@
+#!/bin/bash
+
+# This script builds and installs MaxScale, starts a MaxScale instance, runs the
+# tests use npm and stops MaxScale.
+#
+# 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.
+#
+# TODO: Install and start a local MariaDB server for testing purposes
+
+
+srcdir=$1
+maxscaledir=$PWD/maxscale_test/
+testdir=$PWD/local_test/
+
+mkdir -p $testdir && cd $testdir
+
+# Currently all tests that use npm are for the REST API
+cp -t $testdir -r $srcdir/server/core/test/rest-api/*
+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 $maxscaledir/run/maxscale
+
+# Start MaxScale
+$maxscaledir/bin/maxscale -df $maxscaledir/maxscale.cnf >& $maxscaledir/maxscale.output &
+pid=$!
+
+# Wait for MaxScale to start
+for ((i=0;i<60;i++))
+do
+    $maxscaledir/bin/maxadmin help >& /dev/null && break
+    sleep 1
+done
+
+# Run tests
+cd $testdir
+npm test
+rval=$?
+
+# Stop MaxScale
+kill $pid
+wait
+
+exit $rval