Added notification controller tests

notification/src/test/java/cz/muni/pa165/rest/NotificationControllerTest.java

+package cz.muni.pa165.rest;
+
+import cz.muni.pa165.generated.model.Confirmation;
+import cz.muni.pa165.generated.model.Notification;
+import cz.muni.pa165.generated.model.Receiver;
+import org.junit.jupiter.api.Test;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.http.ResponseEntity;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+class NotificationControllerTest {
+
+    NotificationController controller = new NotificationController();
+    private static final Logger log = LoggerFactory.getLogger(NotificationControllerTest.class);
+
+    @Test
+    void testNotify() {
+        log.debug("testNotify() running");
+
+        ResponseEntity<Confirmation> received = controller.notify(new Notification()
+                .message("Hello")
+                .addReceiversItem(new Receiver().emailAddress("test@doamin.com")));
+
+        assertEquals("Hello", received.getBody().getMessage());
+        assertEquals(1, received.getBody().getReceivers().size());
+        assertEquals("test@doamin.com", received.getBody().getReceivers().get(0).getEmailAddress());
+    }
+}
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