#114 Aggregator pattern; tests; description

eip-aggregator/src/test/java/com/iluwatar/eip/aggregator/AppTest.java

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+package com.iluwatar.eip.aggregator;
+
+import org.junit.Test;
+
+/**
+ * Test for App class
+ */
+public class AppTest {
+
+  @Test
+  public void testMain() throws Exception {
+    String[] args = {};
+    App.main(args);
+  }
+}

eip-aggregator/src/test/java/com/iluwatar/eip/aggregator/routes/AggregatorRouteTest.java

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+package com.iluwatar.eip.aggregator.routes;
+
+import org.apache.camel.EndpointInject;
+import org.apache.camel.ProducerTemplate;
+import org.apache.camel.component.mock.MockEndpoint;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
+import org.springframework.boot.test.SpringApplicationConfiguration;
+import org.springframework.context.annotation.ComponentScan;
+import org.springframework.test.annotation.DirtiesContext;
+import org.springframework.test.context.ActiveProfiles;
+import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
+
+import static org.junit.Assert.assertEquals;
+
+/**
+ * Test class for <i>AggregatorRoute</i>.
+ * <p>
+ * In order for it to work we have to mock endpoints we want to read/write to. To mock those we need to substitute
+ * original endpoint names to mocks.
+ * </p>
+ */
+@RunWith(SpringJUnit4ClassRunner.class)
+@SpringApplicationConfiguration(classes = AggregatorRouteTest.class)
+@ActiveProfiles("test")
+@EnableAutoConfiguration
+@ComponentScan
+public class AggregatorRouteTest {
+
+  @EndpointInject(uri = "{{entry}}")
+  private ProducerTemplate entry;
+
+  @EndpointInject(uri = "{{endpoint}}")
+  private MockEndpoint endpoint;
+
+  /**
+   * Test if endpoint receives three separate messages.
+   * @throws Exception in case of en exception during the test
+   */
+  @Test
+  @DirtiesContext
+  public void testSplitter() throws Exception {
+
+    // Three items in one entry message
+    entry.sendBody("TEST1");
+    entry.sendBody("TEST2");
+    entry.sendBody("TEST3");
+    entry.sendBody("TEST4");
+    entry.sendBody("TEST5");
+
+    // Endpoint should have three different messages in the end order of the messages is not important
+    endpoint.expectedMessageCount(2);
+    endpoint.assertIsSatisfied();
+
+    String body = (String) endpoint.getReceivedExchanges().get(0).getIn().getBody();
+    assertEquals(3, body.split(";").length);
+
+    String body2 = (String) endpoint.getReceivedExchanges().get(1).getIn().getBody();
+    assertEquals(2, body2.split(";").length);
+  }
+}

eip-aggregator/src/test/java/com/iluwatar/eip/aggregator/routes/MessageAggregationStrategyTest.java

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+package com.iluwatar.eip.aggregator.routes;
+
+import org.apache.camel.CamelContext;
+import org.apache.camel.Exchange;
+import org.apache.camel.impl.DefaultExchange;
+import org.junit.Test;
+
+import static org.junit.Assert.assertEquals;
+
+/**
+ * Tests MessageAggregationStrategy
+ */
+public class MessageAggregationStrategyTest {
+
+  @Test
+  public void testAggregate() {
+    MessageAggregationStrategy mas = new MessageAggregationStrategy();
+    Exchange oldExchange = new DefaultExchange((CamelContext) null);
+    oldExchange.getIn().setBody("TEST1");
+
+    Exchange newExchange = new DefaultExchange((CamelContext) null);
+    newExchange.getIn().setBody("TEST2");
+
+    Exchange output = mas.aggregate(oldExchange, newExchange);
+    String outputBody = (String) output.getIn().getBody();
+    assertEquals("TEST1;TEST2", outputBody);
+  }
+
+  @Test
+  public void testAggregateOldNull() {
+    MessageAggregationStrategy mas = new MessageAggregationStrategy();
+
+    Exchange newExchange = new DefaultExchange((CamelContext) null);
+    newExchange.getIn().setBody("TEST2");
+
+    Exchange output = mas.aggregate(null, newExchange);
+    String outputBody = (String) output.getIn().getBody();
+
+    assertEquals(newExchange, output);
+    assertEquals("TEST2", outputBody);
+  }
+}

eip-aggregator/src/test/resources/application-test.properties

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+entry=direct:entry
+endpoint=mock:endpoint