/* Copyright 2019 The TensorFlow Authors. All Rights Reserved. Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License. ==============================================================================*/ package org.tensorflow; import static org.junit.jupiter.api.Assertions.assertEquals; import static org.junit.jupiter.api.Assertions.assertFalse; import static org.junit.jupiter.api.Assertions.assertNotNull; import static org.junit.jupiter.api.Assertions.assertTrue; import static org.junit.jupiter.api.Assertions.fail; import org.bytedeco.javacpp.IntPointer; import org.bytedeco.javacpp.Pointer; import org.junit.jupiter.api.Test; public class EagerSessionTest { @Test public void closeSessionTwiceDoesNotFail() { try (EagerSession s = EagerSession.create()) { s.close(); } } @Test public void cleanupResourceOnSessionClose() { Pointer ref; try (EagerSession s = EagerSession.create()) { s.attach(ref = new IntPointer(1)); assertFalse(ref.isNull()); // check that reaching safe point did not release resources buildOp(s); assertFalse(ref.isNull()); } assertTrue(ref.isNull()); } @Test public void cleanupResourceInBackground() { try (EagerSession s = EagerSession.create()) { Pointer ref = new IntPointer(1024 * 1024); s.attach(ref); assertFalse(ref.isNull()); System.gc(); sleep(50); // allow some time to the background thread for cleaning up resources long before = Pointer.totalBytes(); s.detach(ref.retainReference()); ref = null; System.gc(); sleep(50); // allow some time to the background thread for cleaning up resources long after = Pointer.totalBytes(); assertEquals(4 * 1024 * 1024, before - after); } } @Test public void clearedResourcesAreNotCleanedUp() { Pointer ref; try (EagerSession s = EagerSession.create()) { s.attach(ref = new IntPointer(1)); s.detach(ref.retainReference()); } assertFalse(ref.isNull()); } @Test public void buildingOpWithClosedSessionFails() { EagerSession s = EagerSession.create(); s.close(); try { buildOp(s); fail(); } catch (IllegalStateException e) { // ok } } @Test public void addingReferenceToClosedSessionFails() { EagerSession s = EagerSession.create(); s.close(); try { s.attach(new IntPointer(1)); fail(); } catch (IllegalStateException e) { // ok } } @Test public void defaultSession() throws Exception { EagerSession.closeDefaultForTest(); EagerSession.Options options = EagerSession.options(); EagerSession.initDefault(options); EagerSession session = EagerSession.getDefault(); assertNotNull(session); try { EagerSession.initDefault(options); fail(); } catch (IllegalStateException e) { // expected } try { session.close(); fail(); } catch (IllegalStateException e) { // expected } } private static void buildOp(EagerSession s) { // Creating an operation is a safe point for resource cleanup try { s.opBuilder("Const", "Const"); } catch (UnsupportedOperationException e) { // TODO (karlllessard) remove this exception catch when EagerOperationBuilder is implemented } } private static void sleep(int millis) { try { Thread.sleep(millis); } catch (InterruptedException e) { } } }