Add a unit test to cover mediating an event with no handlers

litenova · Nov 26, 2023 · 956ce1c · 956ce1c
1 parent 243a2fc
commit 956ce1c
Showing 1 changed file with 35 additions and 10 deletions.
diff --git a/tests/LiteBus.Events.UnitTests/EventModuleTests.cs b/tests/LiteBus.Events.UnitTests/EventModuleTests.cs
@@ -13,7 +13,7 @@ namespace LiteBus.Events.UnitTests;
 public sealed class EventModuleTests
 {
  [Fact]
- public async Task Mediating_ProductCreatedEvent_ShouldGoThroughHandlersCorrectly()
+ public async Task mediating_simple_event_goes_through_registered_handlers_correctly()
  {
  // Arrange
  var serviceProvider = new ServiceCollection()
@@ -38,9 +38,9 @@ public async Task Mediating_ProductCreatedEvent_ShouldGoThroughHandlersCorrectly
  @event.ExecutedTypes[6].Should().Be<ProductCreatedEventHandlerPostHandler2>();
  @event.ExecutedTypes[7].Should().Be<GlobalEventPostHandler>();
  }
- 
+
  [Fact]
- public async Task MediatingWithFiltered_ProductCreatedEvent_ShouldGoThroughHandlersCorrectly()
+ public async Task mediating_ProductCreatedEvent_with_filtered_handlers_goes_through_registered_handlers_correctly()
  {
  // Arrange
  var serviceProvider = new ServiceCollection()
@@ -51,10 +51,11 @@ public async Task MediatingWithFiltered_ProductCreatedEvent_ShouldGoThroughHandl
  var @event = new ProductCreatedEvent();
 
  // Act
- await eventMediator.PublishAsync(@event, new EventMediationSettings
- {
- HandlerFilter = type => type.IsAssignableTo(typeof(IFilteredEventHandler))
- });
+ await eventMediator.PublishAsync(@event,
+ new EventMediationSettings
+ {
+ HandlerFilter = type => type.IsAssignableTo(typeof(IFilteredEventHandler))
+ });
 
  // Assert
  @event.ExecutedTypes.Should().HaveCount(6);
@@ -66,16 +67,40 @@ public async Task MediatingWithFiltered_ProductCreatedEvent_ShouldGoThroughHandl
  @event.ExecutedTypes[4].Should().Be<ProductCreatedEventHandlerPostHandler2>();
  @event.ExecutedTypes[5].Should().Be<GlobalEventPostHandler>();
  }
- 
+
  [Fact]
- public async Task Mediating_ProductViewedEvent_ShouldGoThroughHandlersCorrectly()
+ public async Task mediating_ProductCreatedEvent_with_no_handler_throw_exception_when_ThrowIfNoHandlerFound_is_set_true()
+ {
+ // Arrange
+ var serviceProvider = new ServiceCollection()
+ .AddLiteBus(configuration => { configuration.AddEventModule(builder => { builder.RegisterFromAssembly(typeof(ProductCreatedEvent).Assembly); }); })
+ .BuildServiceProvider();
+
+ var eventMediator = serviceProvider.GetRequiredService<IEventMediator>();
+ var @event = new ProductCreatedEvent();
+
+ // Act
+ var act = () => eventMediator.PublishAsync(@event,
+ new EventMediationSettings
+ {
+ HandlerFilter = _ => false,
+ ThrowIfNoHandlerFound = true
+ });
+
+ // Assert
+ await act.Should().ThrowAsync<InvalidOperationException>();
+ }
+
+ [Fact]
+ public async Task mediating_generic_event_goes_through_registered_handlers_correctly()
  {
  // Arrange
  var serviceProvider = new ServiceCollection()
  .AddLiteBus(configuration => { configuration.AddEventModule(builder => { builder.RegisterFromAssembly(typeof(ProductViewedEvent<>).Assembly); }); })
  .BuildServiceProvider();
 
  var eventMediator = serviceProvider.GetRequiredService<IEventMediator>();
+
  var @event = new ProductViewedEvent<Mobile>
  {
  ViewSource = new Mobile()
@@ -96,7 +121,7 @@ public async Task Mediating_ProductViewedEvent_ShouldGoThroughHandlersCorrectly(
  @event.ExecutedTypes[6].Should().Be<ProductViewedEventHandlerPostHandler2<Mobile>>();
  @event.ExecutedTypes[7].Should().Be<GlobalEventPostHandler>();
  }
- 
+
  [Fact]
  public async Task Mediating_ProductUpdatedEvent_ShouldGoThroughHandlersCorrectly()
  {