Fix new Delete with body missing from IWireMockAdminApi interface (#413)

* Fix new Delete with body missing from IWireMockAdminApi interface

* Admin Delete with mappings in body (#409)

* Add unit test for delete with body

* change order of checks for readability. looks nicer.

* Allow body in DELETE requests

* Fix unit tests according to DELETE supporting body

* Re-run CI

* Fix DELETE with body unit test

* Fix ElementAt index in mappings list

* Fix DELETE with body unit test

* Fix theory tag must be accompanied by some InlineData or Member

* Fix didn't use correct checking syntax

* Fix wrap entire unit test in if region

src/WireMock.Net.RestClient/IWireMockAdminApi.cs

@@ -74,6 +74,14 @@ namespace WireMock.Client
         [Delete("mappings")]
         Task<StatusModel> DeleteMappingsAsync();
 
+        /// <summary>
+        /// Delete mappings according to GUIDs
+        /// </summary>
+        /// <param name="mappings">MappingModels</param>
+        [Delete("mappings")]
+        [Header("Content-Type", "application/json")]
+        Task<StatusModel> DeleteMappingsAsync([Body] IList<MappingModel> mappings);
+
         /// <summary>
         /// Delete (reset) all mappings.
         /// </summary>

src/WireMock.Net/Server/WireMockServer.Admin.cs

@@ -555,11 +555,63 @@ namespace WireMock.Server
 
         private ResponseMessage MappingsDelete(RequestMessage requestMessage)
         {
-            ResetMappings();
+            if (!string.IsNullOrEmpty(requestMessage.Body))
+            {
+                var deletedGuids = MappingsDeleteMappingFromBody(requestMessage);
+                if (deletedGuids != null)
+                {
+                    return ResponseMessageBuilder.Create($"Mappings deleted. Affected GUIDs: [{string.Join(", ", deletedGuids.ToArray())}]");
+                }
+                else
+                {
+                    // return bad request
+                    return ResponseMessageBuilder.Create("Poorly formed mapping JSON.", 400);
+                }
+            }
+            else
+            {
+                ResetMappings();
 
-            ResetScenarios();
+                ResetScenarios();
 
-            return ResponseMessageBuilder.Create("Mappings deleted");
+                return ResponseMessageBuilder.Create("Mappings deleted");
+            }
+        }
+
+        private IEnumerable<Guid> MappingsDeleteMappingFromBody(RequestMessage requestMessage)
+        {
+            var deletedGuids = new List<Guid>();
+
+            try
+            {
+                var mappingModels = DeserializeRequestMessageToArray<MappingModel>(requestMessage);
+                foreach (var mappingModel in mappingModels)
+                {
+                    if (mappingModel.Guid.HasValue)
+                    {
+                        if (DeleteMapping(mappingModel.Guid.Value))
+                        {
+                            deletedGuids.Add(mappingModel.Guid.Value);
+                        }
+                        else
+                        {
+                            _settings.Logger.Debug($"Did not find/delete mapping with GUID: {mappingModel.Guid.Value}.");
+                        }
+                    }
+                }
+            }
+            catch (ArgumentException a)
+            {
+                _settings.Logger.Error("ArgumentException: {0}", a);
+                return null;
+            }
+            catch (Exception e)
+            {
+                _settings.Logger.Error("Exception: {0}", e);
+                return null;
+            }
+
+            return deletedGuids;
         }
 
         private ResponseMessage MappingsReset(RequestMessage requestMessage)
@@ -873,7 +925,7 @@ namespace WireMock.Server
                     DetectedBodyType = BodyType.String,
                     BodyAsString = JsonConvert.SerializeObject(result, keepNullValues ? _settingsIncludeNullValues : _jsonSerializerSettings)
                 },
-                StatusCode = (int) HttpStatusCode.OK,
+                StatusCode = (int)HttpStatusCode.OK,
                 Headers = new Dictionary<string, WireMockList<string>> { { HttpKnownHeaderNames.ContentType, new WireMockList<string>(ContentTypeJson) } }
             };
         }

src/WireMock.Net/Util/BodyParser.cs

@@ -34,7 +34,7 @@ namespace WireMock.Util
             { "GET", false },
             { "PUT", true },
             { "POST", true },
-            { "DELETE", false },
+            { "DELETE", true },
             { "TRACE", false },
             { "OPTIONS", true },
             { "CONNECT", false },