@Override
        public void write(JmeExporter je) throws IOException {
            OutputCapsule capsule = je.getCapsule(this);

            capsule.writeByteBufferArrayList(testByteBufferArrayList, "testByteBufferArrayList", null);
            capsule.writeFloatBufferArrayList(testFloatBufferArrayList, "testFloatBufferArrayList", null);
            capsule.writeSavableArrayList(testSavableArrayList, "testSavableArrayList", null);
            capsule.writeSavableArrayListArray(testSavableArrayListArray, "testSavableArrayListArray", null);
            capsule.writeSavableArrayListArray2D(testSavableArrayListArray2D, "testSavableArrayListArray2D", null);
        }
Test suite for implementations of the JmeExporter and JmeImporter interfaces.
There are tests here for all write* and read* methods of the OutputCapsule and InputCapsule interfaces respectively.
jme3-plugins/src/test/java/com/jme3/export/InputOutputCapsuleTest.java