TSK-531 Access id validation failing refinement

rest/taskana-rest-spring-example/src/test/java/pro/taskana/rest/AccessIdValidationControllerTest.java

@@ -1,5 +1,6 @@
 package pro.taskana.rest;
 
+import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertNotNull;
 import static org.junit.Assert.assertTrue;
 
@@ -19,21 +20,25 @@ import org.springframework.hateoas.hal.Jackson2HalModule;
 import org.springframework.http.HttpEntity;
 import org.springframework.http.HttpHeaders;
 import org.springframework.http.HttpMethod;
+import org.springframework.http.HttpStatus;
 import org.springframework.http.MediaType;
 import org.springframework.http.ResponseEntity;
 import org.springframework.http.converter.HttpMessageConverter;
 import org.springframework.http.converter.json.MappingJackson2HttpMessageConverter;
 import org.springframework.test.context.junit4.SpringRunner;
+import org.springframework.web.client.HttpClientErrorException;
 import org.springframework.web.client.RestTemplate;
 
 import com.fasterxml.jackson.databind.DeserializationFeature;
 import com.fasterxml.jackson.databind.ObjectMapper;
 
+import pro.taskana.exceptions.InvalidArgumentException;
 import pro.taskana.ldap.LdapCacheTestImpl;
 import pro.taskana.rest.resource.AccessIdResource;
 
 @RunWith(SpringRunner.class)
-@SpringBootTest(classes = RestConfiguration.class, webEnvironment = WebEnvironment.RANDOM_PORT, properties = {"devMode=true"})
+@SpringBootTest(classes = RestConfiguration.class, webEnvironment = WebEnvironment.RANDOM_PORT, properties = {
+    "devMode=true"})
 public class AccessIdValidationControllerTest {
 
     @LocalServerPort
@@ -49,6 +54,7 @@ public class AccessIdValidationControllerTest {
         ResponseEntity<List<AccessIdResource>> response = template.exchange(
             "http://127.0.0.1:" + port + "/v1/access-ids?searchFor=ali", HttpMethod.GET, request,
             new ParameterizedTypeReference<List<AccessIdResource>>() {
+
             });
         List<AccessIdResource> body = response.getBody();
         assertNotNull(body);
@@ -59,6 +65,26 @@ public class AccessIdValidationControllerTest {
         }
     }
 
+    @Test
+    public void testBadRequestWhenSearchForIsTooShort() {
+        AccessIdController.setLdapCache(new LdapCacheTestImpl());
+        RestTemplate template = getRestTemplate();
+        HttpHeaders headers = new HttpHeaders();
+        headers.add("Authorization", "Basic dGVhbWxlYWRfMTp0ZWFtbGVhZF8x");
+        HttpEntity<String> request = new HttpEntity<String>(headers);
+        try {
+            template.exchange(
+                "http://127.0.0.1:" + port + "/v1/access-ids?searchFor=al", HttpMethod.GET, request,
+                new ParameterizedTypeReference<List<AccessIdResource>>() {
+
+                });
+        } catch (HttpClientErrorException e) {
+            assertEquals(HttpStatus.BAD_REQUEST, e.getStatusCode());
+            assertTrue(e.getResponseBodyAsString().contains("Minimum searchFor length ="));
+        }
+
+    }
+
     /**
      * Return a REST template which is capable of dealing with responses in HAL format
      *

rest/taskana-rest-spring-example/src/test/java/pro/taskana/rest/GenenalExceptionHandlingTest.java

@@ -89,28 +89,31 @@ public class GenenalExceptionHandlingTest {
         try {
 
             AccessIdController.setLdapCache(new LdapCacheTestImpl());
-            ResponseEntity<List<AccessIdResource>> response = template.exchange(
+            template.exchange(
                 server + port + "/v1/access-ids?searchFor=al", HttpMethod.GET, request,
                 new ParameterizedTypeReference<List<AccessIdResource>>() {
 
                 });
         } catch (Exception ex) {
             verify(mockAppender).doAppend(captorLoggingEvent.capture());
-            assertTrue(captorLoggingEvent.getValue().getMessage().contains("is too short. Minimum Length ="));
+            assertTrue(
+                captorLoggingEvent.getValue().getMessage().contains("is too short. Minimum searchFor length = "));
         }
     }
 
     @Test
     public void testDeleteNonExisitingClassificationExceptionIsLogged() {
         try {
-            ResponseEntity<PagedResources<ClassificationSummaryResource>> response = template.exchange(
+            template.exchange(
                 server + port + "/v1/classifications/non-existing-id", HttpMethod.DELETE, request,
                 new ParameterizedTypeReference<PagedResources<ClassificationSummaryResource>>() {
 
                 });
         } catch (Exception ex) {
             verify(mockAppender).doAppend(captorLoggingEvent.capture());
-            assertTrue(captorLoggingEvent.getValue().getMessage().contains("The classification \"non-existing-id\" wasn't found"));
+            assertTrue(captorLoggingEvent.getValue()
+                .getMessage()
+                .contains("The classification \"non-existing-id\" wasn't found"));
         }
 
     }

rest/taskana-rest-spring/src/main/java/pro/taskana/rest/AccessIdController.java

@@ -35,9 +35,9 @@ public class AccessIdController {
 
     @GetMapping
     public ResponseEntity<List<AccessIdResource>> validateAccessIds(
-        @RequestParam(required = false) String searchFor) throws InvalidArgumentException {
-        if (searchFor == null || searchFor.length() < ldapClient.getMinSearchForLength()) {
-            throw new InvalidArgumentException("searchFor string " + searchFor + " is too short. Minimum Length = "
+        @RequestParam String searchFor) throws InvalidArgumentException {
+        if (searchFor.length() < ldapClient.getMinSearchForLength()) {
+            throw new InvalidArgumentException("searchFor string '" + searchFor + "' is too short. Minimum searchFor length = "
                 + ldapClient.getMinSearchForLength());
         }
         if (ldapClient.useLdap()) {