- removed optional classes and interfaces in order to simplify the example

- final fields are marked as final
- removed unnecessary temp variables
- added private constructor for not instantiated static class AccountAggregate
- path of te test file is corrected

event-sourcing/src/test/java/IntegrationTest.java

@@ -0,0 +1,99 @@
+/**
+ * The MIT License
+ * Copyright (c) 2014 Ilkka Seppälä
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+import static com.iluwatar.event.sourcing.app.App.ACCOUNT_OF_DAENERYS;
+import static com.iluwatar.event.sourcing.app.App.ACCOUNT_OF_JON;
+
+import com.iluwatar.event.sourcing.domain.Account;
+import com.iluwatar.event.sourcing.event.AccountCreateEvent;
+import com.iluwatar.event.sourcing.event.MoneyDepositEvent;
+import com.iluwatar.event.sourcing.event.MoneyTransferEvent;
+import com.iluwatar.event.sourcing.processor.DomainEventProcessor;
+import com.iluwatar.event.sourcing.state.AccountAggregate;
+import java.math.BigDecimal;
+import java.util.Date;
+import org.junit.Assert;
+import org.junit.Before;
+import org.junit.Test;
+
+/**
+ * Intergartion Test for Event Sourcing state recovery
+ *
+ * Created by Serdar Hamzaogullari on 19.08.2017.
+ */
+public class IntegrationTest {
+
+  /**
+   * The Domain event processor.
+   */
+  private DomainEventProcessor eventProcessor;
+
+  /**
+   * Initialize.
+   */
+  @Before
+  public void initialize() {
+    eventProcessor = new DomainEventProcessor();
+  }
+
+  /**
+   * Test state recovery.
+   */
+  @Test
+  public void testStateRecovery() {
+    eventProcessor.reset();
+
+    eventProcessor.process(new AccountCreateEvent(
+        0, new Date().getTime(), ACCOUNT_OF_DAENERYS, "Daenerys Targaryen"));
+
+    eventProcessor.process(new AccountCreateEvent(
+        1, new Date().getTime(), ACCOUNT_OF_JON, "Jon Snow"));
+
+    eventProcessor.process(new MoneyDepositEvent(
+        2, new Date().getTime(), ACCOUNT_OF_DAENERYS,  new BigDecimal("100000")));
+
+    eventProcessor.process(new MoneyDepositEvent(
+        3, new Date().getTime(), ACCOUNT_OF_JON,  new BigDecimal("100")));
+
+    eventProcessor.process(new MoneyTransferEvent(
+        4, new Date().getTime(), new BigDecimal("10000"), ACCOUNT_OF_DAENERYS,
+        ACCOUNT_OF_JON));
+
+    Account accountOfDaenerysBeforeShotDown = AccountAggregate.getAccount(ACCOUNT_OF_DAENERYS);
+    Account accountOfJonBeforeShotDown = AccountAggregate.getAccount(ACCOUNT_OF_JON);
+
+    AccountAggregate.resetState();
+
+    eventProcessor = new DomainEventProcessor();
+    eventProcessor.recover();
+
+    Account accountOfDaenerysAfterShotDown = AccountAggregate.getAccount(ACCOUNT_OF_DAENERYS);
+    Account accountOfJonAfterShotDown = AccountAggregate.getAccount(ACCOUNT_OF_JON);
+
+    Assert.assertEquals(accountOfDaenerysBeforeShotDown.getMoney(),
+        accountOfDaenerysAfterShotDown.getMoney());
+    Assert
+        .assertEquals(accountOfJonBeforeShotDown.getMoney(), accountOfJonAfterShotDown.getMoney());
+  }
+
+}