Add SET_OF_STRING_GENERIC_TYPE constant to KiwiGenericTypes (#759)

Add a new constant to KiwiGenericTypes to support the somewhat common
Set<String> type. At least, it is common for us...

src/main/java/org/kiwiproject/jaxrs/KiwiGenericTypes.java

@@ -5,6 +5,7 @@
 import javax.ws.rs.core.GenericType;
 import java.util.List;
 import java.util.Map;
+import java.util.Set;
 
 /**
  * Utilities/constants for containing common, re-usable types of {@link GenericType} objects.
@@ -43,4 +44,8 @@ public class KiwiGenericTypes {
     public static final GenericType<List<Boolean>> LIST_OF_BOOLEAN_GENERIC_TYPE =
             new GenericType<>() {
             };
+
+    public static final GenericType<Set<String>> SET_OF_STRING_GENERIC_TYPE =
+            new GenericType<>() {
+            };
 }

src/test/java/org/kiwiproject/jaxrs/KiwiGenericTypesTest.java

@@ -19,6 +19,7 @@
 import javax.ws.rs.core.Response;
 import java.util.List;
 import java.util.Map;
+import java.util.Set;
 
 @DisplayName("KiwiGenericTypes")
 @ExtendWith(DropwizardExtensionsSupport.class)
@@ -73,6 +74,13 @@ public Response getOnSale() {
             var onSale = List.of(true, false, false);
             return Response.ok(onSale).build();
         }
+
+        @GET
+        @Path("/bodyTypes")
+        public Response getBodyTypes() {
+            var types = List.of("sedan", "sedan", "SUV");
+            return Response.ok(types).build();
+        }
     }
 
     private static final ResourceExtension RESOURCES = ResourceExtension.builder()
@@ -176,4 +184,14 @@ void shouldSupportListOfBooleans() {
 
         assertThat(onSale).containsExactly(true, false, false);
     }
+
+    @Test
+    void shouldSupportSetOfStrings() {
+        Set<String> models = RESOURCES.client()
+                .target("/genericTypes/bodyTypes")
+                .request()
+                .get(KiwiGenericTypes.SET_OF_STRING_GENERIC_TYPE);
+
+        assertThat(models).containsExactlyInAnyOrder("sedan", "SUV");
+    }
 }