fix tests with es8

Author: fupelaqu

es8/testkit/build.sbt

@@ -12,5 +12,31 @@ libraryDependencies ++= elastic4sTestkitDependencies(elasticSearchVersion.value)
   "org.testcontainers" % "elasticsearch" % Versions.testContainers excludeAll (jacksonExclusions: _*)
 )
 
+val testJavaOptions = {
+  val heapSize = sys.env.getOrElse("HEAP_SIZE", "1g")
+  val extraTestJavaArgs = Seq(
+    "-XX:+IgnoreUnrecognizedVMOptions",
+    "--add-opens=java.base/java.lang=ALL-UNNAMED",
+    "--add-opens=java.base/java.lang.invoke=ALL-UNNAMED",
+    "--add-opens=java.base/java.lang.reflect=ALL-UNNAMED",
+    "--add-opens=java.base/java.io=ALL-UNNAMED",
+    "--add-opens=java.base/java.net=ALL-UNNAMED",
+    "--add-opens=java.base/java.nio=ALL-UNNAMED",
+    "--add-opens=java.base/java.util=ALL-UNNAMED",
+    "--add-opens=java.base/java.util.concurrent=ALL-UNNAMED",
+    "--add-opens=java.base/java.util.concurrent.atomic=ALL-UNNAMED",
+    "--add-opens=java.base/jdk.internal.ref=ALL-UNNAMED",
+    "--add-opens=java.base/sun.nio.ch=ALL-UNNAMED",
+    "--add-opens=java.base/sun.nio.cs=ALL-UNNAMED",
+    "--add-opens=java.base/sun.security.action=ALL-UNNAMED",
+    "--add-opens=java.base/sun.util.calendar=ALL-UNNAMED"
+  ).mkString(" ")
+  s"-Xmx$heapSize -Xss4m -XX:ReservedCodeCacheSize=128m -Dfile.encoding=UTF-8 $extraTestJavaArgs"
+    .split(" ")
+    .toSeq
+}
+
+Test / javaOptions ++= testJavaOptions
+
 // Required by the Test container framework
 Test / fork := true