Spring Integration Subflows

Issue: BAEL-2276

spring-integration/src/test/java/com/baeldung/subflows/discardflow/FilterUnitTest.java

@@ -0,0 +1,62 @@
+package com.baeldung.subflows.discardflow;
+
+import static org.junit.Assert.assertEquals;
+
+import java.util.Arrays;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.integration.channel.QueueChannel;
+import org.springframework.messaging.Message;
+import org.springframework.test.context.ContextConfiguration;
+import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
+
+import com.baeldung.subflows.discardflow.FilterExample.NumbersClassifier;
+
+@RunWith(SpringJUnit4ClassRunner.class)
+@ContextConfiguration(classes = { FilterExample.class })
+public class FilterUnitTest {
+    @Autowired
+    private QueueChannel multipleofThreeChannel;
+
+    @Autowired
+    private QueueChannel remainderIsOneChannel;
+
+    @Autowired
+    private QueueChannel remainderIsTwoChannel;
+
+    @Autowired
+    private NumbersClassifier numbersClassifier;
+
+    @Test
+    public void whenSendMessagesToFlow_thenNumbersAreClassified() {
+
+        numbersClassifier.classify(Arrays.asList(1, 2, 3, 4, 5, 6));
+
+        Message<?> outMessage = multipleofThreeChannel.receive(0);
+
+        assertEquals(outMessage.getPayload(), 3);
+
+        outMessage = multipleofThreeChannel.receive(0);
+
+        assertEquals(outMessage.getPayload(), 6);
+
+        outMessage = remainderIsOneChannel.receive(0);
+
+        assertEquals(outMessage.getPayload(), 1);
+        outMessage = remainderIsOneChannel.receive(0);
+
+        assertEquals(outMessage.getPayload(), 4);
+
+        outMessage = remainderIsTwoChannel.receive(0);
+
+        assertEquals(outMessage.getPayload(), 2);
+
+        outMessage = remainderIsTwoChannel.receive(0);
+
+        assertEquals(outMessage.getPayload(), 5);
+
+    }
+
+}

spring-integration/src/test/java/com/baeldung/subflows/publishsubscribechannel/PublishSubscribeChannelUnitTest.java

@@ -0,0 +1,62 @@
+package com.baeldung.subflows.publishsubscribechannel;
+
+import static org.junit.Assert.assertEquals;
+
+import java.util.Arrays;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.integration.channel.QueueChannel;
+import org.springframework.messaging.Message;
+import org.springframework.test.context.ContextConfiguration;
+import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
+
+import com.baeldung.subflows.publishsubscribechannel.PublishSubscibeChannelExample.NumbersClassifier;
+
+@RunWith(SpringJUnit4ClassRunner.class)
+@ContextConfiguration(classes = { PublishSubscibeChannelExample.class })
+public class PublishSubscribeChannelUnitTest {
+    @Autowired
+    private QueueChannel multipleofThreeChannel;
+
+    @Autowired
+    private QueueChannel remainderIsOneChannel;
+
+    @Autowired
+    private QueueChannel remainderIsTwoChannel;
+
+    @Autowired
+    private NumbersClassifier numbersClassifier;
+
+    @Test
+    public void whenSendMessagesToFlow_thenNumbersAreClassified() {
+
+        numbersClassifier.classify(Arrays.asList(1, 2, 3, 4, 5, 6));
+       
+        Message<?> outMessage = multipleofThreeChannel.receive(0);
+
+        assertEquals(outMessage.getPayload(), 3);
+
+        outMessage = multipleofThreeChannel.receive(0);
+
+        assertEquals(outMessage.getPayload(), 6);
+       
+        outMessage = remainderIsOneChannel.receive(0);
+
+        assertEquals(outMessage.getPayload(), 1);
+        outMessage = remainderIsOneChannel.receive(0);
+
+        assertEquals(outMessage.getPayload(), 4);
+      
+        outMessage = remainderIsTwoChannel.receive(0);
+
+        assertEquals(outMessage.getPayload(), 2);
+
+        outMessage = remainderIsTwoChannel.receive(0);
+
+        assertEquals(outMessage.getPayload(), 5);
+
+    }
+
+}

spring-integration/src/test/java/com/baeldung/subflows/routetorecipients/RouteToRecipientsUnitTest.java

@@ -0,0 +1,63 @@
+package com.baeldung.subflows.routetorecipients;
+
+import static org.junit.Assert.assertEquals;
+
+import java.util.Arrays;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.integration.channel.QueueChannel;
+import org.springframework.messaging.Message;
+import org.springframework.test.context.ContextConfiguration;
+import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
+
+import com.baeldung.subflows.routetorecipients.RouteToRecipientsExample;
+import com.baeldung.subflows.routetorecipients.RouteToRecipientsExample.NumbersClassifier;
+
+@RunWith(SpringJUnit4ClassRunner.class)
+@ContextConfiguration(classes = { RouteToRecipientsExample.class })
+public class RouteToRecipientsUnitTest {
+    @Autowired
+    private QueueChannel multipleofThreeChannel;
+
+    @Autowired
+    private QueueChannel remainderIsOneChannel;
+
+    @Autowired
+    private QueueChannel remainderIsTwoChannel;
+
+    @Autowired
+    private NumbersClassifier numbersClassifier;
+
+    @Test
+    public void whenSendMessagesToFlow_thenNumbersAreClassified() {
+
+        numbersClassifier.classify(Arrays.asList(1, 2, 3, 4, 5, 6));
+
+        Message<?> outMessage = multipleofThreeChannel.receive(0);
+
+        assertEquals(outMessage.getPayload(), 3);
+
+        outMessage = multipleofThreeChannel.receive(0);
+
+        assertEquals(outMessage.getPayload(), 6);
+
+        outMessage = remainderIsOneChannel.receive(0);
+
+        assertEquals(outMessage.getPayload(), 1);
+        outMessage = remainderIsOneChannel.receive(0);
+
+        assertEquals(outMessage.getPayload(), 4);
+
+        outMessage = remainderIsTwoChannel.receive(0);
+
+        assertEquals(outMessage.getPayload(), 2);
+
+        outMessage = remainderIsTwoChannel.receive(0);
+
+        assertEquals(outMessage.getPayload(), 5);
+
+    }
+
+}

spring-integration/src/test/java/com/baeldung/subflows/separateflows/SeparateFlowsUnitTest.java

@@ -0,0 +1,75 @@
+package com.baeldung.subflows.separateflows;
+
+import java.util.Arrays;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.integration.channel.QueueChannel;
+import org.springframework.messaging.Message;
+import org.springframework.test.context.ContextConfiguration;
+import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertNull;
+import com.baeldung.subflows.separateflows.SeparateFlowsExample.NumbersClassifier;
+
+@RunWith(SpringJUnit4ClassRunner.class)
+@ContextConfiguration(classes = { SeparateFlowsExample.class })
+public class SeparateFlowsUnitTest {
+    @Autowired
+    private QueueChannel multipleOfThreeChannel;
+    @Autowired
+    private QueueChannel remainderIsOneChannel;
+    @Autowired
+    private QueueChannel remainderIsTwoChannel;
+
+    @Autowired
+    private NumbersClassifier numbersClassifier;
+
+    @Test
+    public void whenSendMessagesToMultipleOf3Flow_thenOutputMultiplesOf3() {
+
+        numbersClassifier.multipleofThree(Arrays.asList(1, 2, 3, 4, 5, 6));
+
+        Message<?> outMessage = multipleOfThreeChannel.receive(0);
+
+        assertEquals(outMessage.getPayload(), 3);
+
+        outMessage = multipleOfThreeChannel.receive(0);
+
+        assertEquals(outMessage.getPayload(), 6);
+        outMessage = multipleOfThreeChannel.receive(0);
+        assertNull(outMessage);
+    }
+
+    @Test
+    public void whenSendMessagesToRemainderIs1Flow_thenOutputRemainderIs1() {
+
+        numbersClassifier.remainderIsOne(Arrays.asList(1, 2, 3, 4, 5, 6));
+
+        Message<?> outMessage = remainderIsOneChannel.receive(0);
+
+        assertEquals(outMessage.getPayload(), 1);
+
+        outMessage = remainderIsOneChannel.receive(0);
+
+        assertEquals(outMessage.getPayload(), 4);
+
+    }
+
+    @Test
+    public void whenSendMessagesToRemainderIs2Flow_thenOutputRemainderIs2() {
+
+        numbersClassifier.remainderIsTwo(Arrays.asList(1, 2, 3, 4, 5, 6));
+
+        Message<?> outMessage = remainderIsTwoChannel.receive(0);
+
+        assertEquals(outMessage.getPayload(), 2);
+
+        outMessage = remainderIsTwoChannel.receive(0);
+
+        assertEquals(outMessage.getPayload(), 5);
+
+    }
+
+}

spring-integration/src/test/java/com/baeldung/subflows/subflowmapping/RouterUnitTest.java

@@ -0,0 +1,62 @@
+package com.baeldung.subflows.subflowmapping;
+
+import static org.junit.Assert.assertEquals;
+
+import java.util.Arrays;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.integration.channel.QueueChannel;
+import org.springframework.messaging.Message;
+import org.springframework.test.context.ContextConfiguration;
+import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
+
+import com.baeldung.subflows.subflowmapping.RouterExample.NumbersClassifier;
+
+@RunWith(SpringJUnit4ClassRunner.class)
+@ContextConfiguration(classes = { RouterExample.class })
+public class RouterUnitTest {
+    @Autowired
+    private QueueChannel multipleofThreeChannel;
+
+    @Autowired
+    private QueueChannel remainderIsOneChannel;
+
+    @Autowired
+    private QueueChannel remainderIsTwoChannel;
+
+    @Autowired
+    private NumbersClassifier numbersClassifier;
+
+    @Test
+    public void whenSendMessagesToFlow_thenNumbersAreClassified() {
+
+        numbersClassifier.classify(Arrays.asList(1, 2, 3, 4, 5, 6));
+
+        Message<?> outMessage = multipleofThreeChannel.receive(0);
+
+        assertEquals(outMessage.getPayload(), 3);
+
+        outMessage = multipleofThreeChannel.receive(0);
+
+        assertEquals(outMessage.getPayload(), 6);
+
+        outMessage = remainderIsOneChannel.receive(0);
+
+        assertEquals(outMessage.getPayload(), 1);
+        outMessage = remainderIsOneChannel.receive(0);
+
+        assertEquals(outMessage.getPayload(), 4);
+
+        outMessage = remainderIsTwoChannel.receive(0);
+
+        assertEquals(outMessage.getPayload(), 2);
+
+        outMessage = remainderIsTwoChannel.receive(0);
+
+        assertEquals(outMessage.getPayload(), 5);
+
+    }
+
+}