Quarantine and fix Http1Connection_RequestEndsWithIncompleteReadAsync (…

…#57946)

src/Servers/Kestrel/test/InMemory.FunctionalTests/KestrelMetricsTests.cs

@@ -159,6 +159,7 @@ await connection.ReceiveEnd(
  }
 
  [Fact]
+ [QuarantinedTest("https://github.com/dotnet/aspnetcore/issues/57944")]
  public async Task Http1Connection_RequestEndsWithIncompleteReadAsync()
  {
  var testMeterFactory = new TestMeterFactory();
@@ -171,7 +172,12 @@ public async Task Http1Connection_RequestEndsWithIncompleteReadAsync()
  await using var server = new TestServer(async context =>
  {
  var result = await context.Request.BodyReader.ReadAsync();
- await context.Response.BodyWriter.WriteAsync(result.Buffer.ToArray());
+
+ // The request body might be incomplete, but there should be something in the first read.
+ Assert.True(result.Buffer.Length > 0);
+ Assert.Equal(result.Buffer.ToSpan(), "Hello World?"u8[..(int)result.Buffer.Length]);
+
+ await context.Response.WriteAsync("Hello World?");
  // No BodyReader.Advance. Connection will fail when attempting to complete body.
  }, serviceContext);