Changed bunit jsruntime such that it picks the last matching handler instead of expecting a single or none

Author: egil

src/bunit.web/JSInterop/BunitJSInterop.cs

@@ -170,12 +170,12 @@ public ValueTask<TValue> InvokeAsync<TValue>(string identifier, CancellationToke
 				ValueTask<TValue>? result = default;
 				if (_jsInterop._handlers.TryGetValue(identifier, out var plannedInvocations))
 				{
-					var planned = plannedInvocations.OfType<JSRuntimeInvocationHandlerBase<TValue>>()
-						.SingleOrDefault(x => x.Matches(invocation));
+					var handler = plannedInvocations.OfType<JSRuntimeInvocationHandlerBase<TValue>>()
+						.Where(x => x.Matches(invocation)).LastOrDefault();
 
-					if (planned is not null)
+					if (handler is not null)
 					{
-						var task = planned.RegisterInvocation(invocation);
+						var task = handler.RegisterInvocation(invocation);
 						return new ValueTask<TValue>(task);
 					}
 				}

tests/bunit.web.tests/JSInterop/BunitJSInteropTest.cs

@@ -382,5 +382,19 @@ public async Task Test022()
 			handler.Invocations.Count.ShouldBe(1);
 			plannedCatchall.Invocations.Count.ShouldBe(0);
 		}
+
+		[Fact(DisplayName = "The last handler matching an invocation receives the invocation")]
+		public void Test030()
+		{
+			var identifier = "someFunc";
+			var sut = CreateSut(JSRuntimeMode.Strict);
+			var h1 = sut.Setup<string>(identifier);
+			var h2 = sut.Setup<string>(identifier);
+
+			sut.JSRuntime.InvokeAsync<string>(identifier);
+
+			h1.Invocations.ShouldBeEmpty();
+			h2.Invocations.Count.ShouldBe(1);
+		}
 	}
 }