Added COMPILATION_LEVEL arg, adjusted npm script

Author: ctjlewis

package.json

@@ -16,7 +16,7 @@
     "jsdom": "^16.3.0"
   },
   "scripts": {
-    "build": "mvn -DskipTests",
+    "build": "clean && mvn -DskipTests",
     "build:fast": "mvn -DskipTests -pl externs/pom.xml,pom-main.xml,pom-main-shaded.xml",
     "clean": "mvn clean",
     "runtime_tests:build": "./utils/build_runtime_tests.sh",

utils/build_runtime_tests.sh

@@ -15,13 +15,18 @@
 
 #!/bin/bash
 
+if [ -z $1 ]; then
+  COMPILATION_LEVEL="SIMPLE"
+else
+  COMPILATION_LEVEL=$1
+fi
+
 # to translate from relative dir
 abs_dirname() {
   echo "$(cd "$(dirname "$1")" && pwd)/$(basename "$1")"
 }
 
 LOCAL_COMPILER=$(dirname ..)/target/closure-compiler-1.0-SNAPSHOT.jar
-echo $LOCAL_COMPILER
 if [ ! -f "$LOCAL_COMPILER" ]; then
   echo -e "\nCompiler JAR not built. Building...\n" && yarn build:fast
 fi
@@ -57,6 +62,7 @@ compileRuntimeTests(){
 $(
   java -server -XX:+TieredCompilation \
     -jar $LOCAL_COMPILER \
+    -O $COMPILATION_LEVEL \
     --language_in ES_NEXT \
     --language_out NO_TRANSPILE \
     --process_common_js_modules \