failing test + document how to get started

Author: NullVoxPopuli

README.md

@@ -75,3 +75,41 @@ public class Startup
     }
 }
 ```
+
+### Development
+
+Restore all nuget packages with:
+
+```bash
+dotnet restore
+```
+
+#### Testing
+
+Running tests locally requires access to a postgresql database.  
+If you have docker installed, this can be propped up via: 
+
+```bash
+docker run --rm --name jsonapi-dotnet-core-testing \
+  -e POSTGRES_DB=JsonApiDotNetCoreExample \
+  -e POSTGRES_USER=postgres \
+  -e POSTGRES_PASSWORD=postgres \
+  -p 5432:5432 \
+  postgres
+```
+
+And then to run the tests:
+
+```bash
+dotnet test
+```
+
+#### Cleaning
+
+Sometimes the compiled files can be dirty / corrupt from other branches / failed builds.
+If your bash prompt supports the globstar, you can recursively delete the `bin` and `obj` directories:
+
+```bash
+shopt -s globstar
+rm -rf **/bin && rm -rf **/obj
+```

src/Examples/JsonApiDotNetCoreExample/Models/TodoItem.cs

@@ -24,6 +24,12 @@ public TodoItem()
 
         [Attr("achieved-date", isFilterable: false, isSortable: false)]
         public DateTime? AchievedDate { get; set; }
+
+
+        [Attr("updated-date")]
+        public DateTime? UpdatedDate { get; set; }
+
+
 
         public int? OwnerId { get; set; }
         public int? AssigneeId { get; set; }

test/JsonApiDotNetCoreExampleTests/Acceptance/TodoItemsControllerTests.cs

@@ -90,6 +90,29 @@ public async Task Can_Filter_TodoItems()
                 Assert.Equal(todoItem.Ordinal, todoItemResult.Ordinal);
         }
 
+        [Fact]
+        public async Task Can_Filter_TodoItems_Using_NotEqual_Operator()
+        {
+            // Arrange
+            var todoItem = _todoItemFaker.Generate();
+            todoItem.UpdatedDate = null;
+            _context.TodoItems.Add(todoItem);
+            _context.SaveChanges();
+
+            var httpMethod = new HttpMethod("GET");
+            var route = $"/api/v1/todo-items?filter[updated-date]=ne:null";
+            var request = new HttpRequestMessage(httpMethod, route);
+
+            // Act
+            var response = await _fixture.Client.SendAsync(request);
+            var body = await response.Content.ReadAsStringAsync();
+            var deserializedBody = _fixture.GetService<IJsonApiDeSerializer>().DeserializeList<TodoItem>(body);
+
+            // Assert
+            Assert.Equal(HttpStatusCode.OK, response.StatusCode);
+            Assert.Empty(deserializedBody);
+        }
+
         [Fact]
         public async Task Can_Filter_TodoItems_Using_Like_Operator()
         {