Add unit test for ComponentDestinationTest.java

core/src/test/java/uk/gov/justice/services/core/sender/ComponentDestinationTest.java

@@ -0,0 +1,33 @@
+package uk.gov.justice.services.core.sender;
+
+import org.junit.Before;
+import org.junit.Test;
+import uk.gov.justice.services.core.annotation.Component;
+
+import static org.hamcrest.CoreMatchers.equalTo;
+import static org.junit.Assert.assertThat;
+
+public class ComponentDestinationTest {
+
+    private ComponentDestination componentDestination;
+
+    @Before
+    public void setup() {
+        componentDestination = new ComponentDestination();
+    }
+
+    @Test
+    public void shouldReturnCommandController() throws Exception {
+        assertThat(componentDestination.getDefault(Component.COMMAND_API), equalTo(Component.COMMAND_CONTROLLER));
+    }
+
+    @Test
+    public void shouldReturnCommandHandler() throws Exception {
+        assertThat(componentDestination.getDefault(Component.COMMAND_CONTROLLER), equalTo(Component.COMMAND_HANDLER));
+    }
+
+    @Test(expected = IllegalArgumentException.class)
+    public void shouldThrowExceptionOnComponentWithNoDefaultDestination() throws Exception {
+        componentDestination.getDefault(Component.COMMAND_HANDLER);
+    }
+}