Tests: print file.encoding and sun.jnu.encoding.

Author: greenrobot-team

tests/objectbox-java-test/src/test/java/io/objectbox/AbstractObjectBoxTest.java

@@ -91,6 +91,8 @@ public void setUp() throws IOException {
             System.out.println("ObjectBox Core version: " + BoxStore.getVersionNative());
             System.out.println("First DB dir: " + boxStoreDir);
             System.out.println("java.version=" + System.getProperty("java.version"));
+            System.out.println("file.encoding=" + System.getProperty("file.encoding"));
+            System.out.println("sun.jnu.encoding=" + System.getProperty("sun.jnu.encoding"));
         }
 
         store = createBoxStore();