DTSRD-261: tests (#557)

* DTSRD-261: initial implementation

* DTSRD-261: rename test

* DTSRD-261: add extra assertion

* DTSRD-261: add unit test

Author: fiyin-cgi

src/integrationTest/java/uk/gov/hmcts/reform/lrdapi/RetrieveCourtVenuesBySearchStringIntegrationTest.java

@@ -45,6 +45,21 @@ void shouldRetrieveCourtVenues_For_SearchString_WithStatusCode_200()
         responseVerification(new ArrayList<>(Arrays.asList(response)));
     }
 
+    @Test
+    @SuppressWarnings("unchecked")
+    void shouldReturn400_WhenSearchStringIsEmpty()
+        throws JsonProcessingException {
+        Map<String, Object> errorResponseMap = (Map<String, Object>)
+            lrdApiClient.findCourtVenuesBySearchString(
+                "",
+                ErrorResponse.class,
+                path
+            );
+
+        assertNotNull(errorResponseMap);
+        assertThat(errorResponseMap).containsEntry(HTTP_STATUS_STR, HttpStatus.BAD_REQUEST);
+    }
+
     @ParameterizedTest
     @ValueSource(strings = {"?search-string=Stoke-on-Trent", "?search-string=Stoke-", "?search-string=stoke-on",
         "?search-string=stoke-on-"})

src/test/java/uk/gov/hmcts/reform/lrdapi/controllers/LrdCourtVenueControllerTest.java

@@ -211,6 +211,12 @@ void testGetCourtVenuesBySearchStringWithInvalidCourtTypeIdWithComma() {
             lrdCourtVenueController.retrieveCourtVenuesBySearchString("ABC", ",1,2,", null, null, null, null));
     }
 
+    @Test
+    void testGetCourtVenuesBySearchStringWithEmptyString() {
+        assertThrows(InvalidRequestException.class, () ->
+            lrdCourtVenueController.retrieveCourtVenuesBySearchString("", null, null, null, null, null));
+    }
+
     @ParameterizedTest
     @ValueSource(strings = {"?search-string=abc--", "?search-string=ab__c", "?search-string=___c",
         "?search-string=___", "?search-string=@@@", "?search-string=---", "?search-string='''",