Skip tests when running on plain JDK8

Author: Jaroslav Tulach

src/test/java/com/mycompany/app/AppTest.java

@@ -1,6 +1,8 @@
 package com.mycompany.app;
 
+import org.graalvm.polyglot.Context;
 import static org.junit.Assert.fail;
+import org.junit.Assume;
 import org.junit.BeforeClass;
 import org.junit.Test;
 
@@ -14,6 +16,7 @@ public static void nashornBenchmark() throws Exception {
 
     @Test
     public void testGraalPolyglotSpeed() throws Exception {
+        assertGraalVMOrJDK11();
         long graalJS = App.benchGraalPolyglotContext();
         if (nashorn < graalJS) {
             fail(String.format("Graal.js (%d ms) should be faster than Nashorn (%d ms).", graalJS, nashorn));
@@ -22,9 +25,18 @@ public void testGraalPolyglotSpeed() throws Exception {
 
     @Test
     public void testGraalScriptEngineSpeed() throws Exception {
+        assertGraalVMOrJDK11();
         long graalJS = App.benchGraalScriptEngine();
         if (nashorn < graalJS) {
             fail(String.format("Graal.js (%d ms) should be faster than Nashorn (%d ms).", graalJS, nashorn));
         }
     }
+
+    private void assertGraalVMOrJDK11() {
+        try {
+            Context.create().close();
+        } catch (IllegalStateException ex) {
+            Assume.assumeNoException("Download GraalVM.org or use JDK11!", ex);
+        }
+    }
 }