add ExceptionTest

Author: greenrobot

objectbox-java/src/main/java/io/objectbox/exception/DbExceptionListener.java

@@ -54,4 +54,6 @@ static void cancelCurrentException() {
  */
 class DbExceptionListenerJni {
     native static void nativeCancelCurrentException();
+
+    native static void nativeThrowException(long nativeStore, int exNo);
 }

tests/objectbox-java-test/src/test/java/io/objectbox/exception/ExceptionTest.java

@@ -0,0 +1,62 @@
+/*
+ * Copyright 2020 ObjectBox Ltd. 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 io.objectbox.exception;
+
+import io.objectbox.AbstractObjectBoxTest;
+import org.junit.Test;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import static org.junit.Assert.assertEquals;
+
+public class ExceptionTest extends AbstractObjectBoxTest {
+
+    @Test
+    public void testThrowExceptions() {
+        final List<Exception> exs = new ArrayList<>();
+        DbExceptionListener exceptionListener = e -> {
+            exs.add(e);
+            DbExceptionListener.cancelCurrentException();
+        };
+        store.setDbExceptionListener(exceptionListener);
+        int maxExNo = 10;
+        for (int exNo = 0; exNo <= maxExNo; exNo++) {
+            DbExceptionListenerJni.nativeThrowException(store.getNativeStore(), exNo);
+        }
+        int expectedSize = maxExNo + 1;
+        assertEquals(expectedSize, exs.size());
+        Class<?>[] expectedClasses = {
+                DbException.class,
+                IllegalStateException.class,
+                DbException.class,  // OpenDb
+                DbFullException.class,
+                DbShutdownException.class,
+                DbSchemaException.class,
+                ConstraintViolationException.class,
+                UniqueViolationException.class,
+                FileCorruptException.class,
+                PagesCorruptException.class,
+                IllegalArgumentException.class,
+        };
+        assertEquals(expectedSize, expectedClasses.length);
+        for (int i = 0; i < expectedSize; i++) {
+            assertEquals(expectedClasses[i], exs.get(i).getClass());
+        }
+    }
+
+}