Include a test for setting header_table_size

tests/h2-support/src/frames.rs

@@ -372,6 +372,11 @@ impl Mock<frame::Settings> {
         self.0.set_enable_connect_protocol(Some(val));
         self
     }
+
+    pub fn header_table_size(mut self, val: u32) -> Self {
+        self.0.set_header_table_size(Some(val));
+        self
+    }
 }
 
 impl From<Mock<frame::Settings>> for frame::Settings {

tests/h2-tests/tests/client_request.rs

@@ -1452,6 +1452,40 @@ async fn extended_connect_request() {
     join(srv, h2).await;
 }
 
+#[tokio::test]
+async fn client_builder_header_table_size() {
+    h2_support::trace_init!();
+    let (io, mut srv) = mock::new();
+    let mut settings = frame::Settings::default();
+
+    settings.set_header_table_size(Some(10000));
+
+    let srv = async move {
+        let recv_settings = srv.assert_client_handshake().await;
+        assert_frame_eq(recv_settings, settings);
+
+        srv.recv_frame(
+            frames::headers(1)
+                .request("GET", "https://example.com/")
+                .eos(),
+        )
+        .await;
+        srv.send_frame(frames::headers(1).response(200).eos()).await;
+    };
+
+    let mut builder = client::Builder::new();
+    builder.header_table_size(10000);
+
+    let h2 = async move {
+        let (mut client, mut h2) = builder.handshake::<_, Bytes>(io).await.unwrap();
+        let request = Request::get("https://example.com/").body(()).unwrap();
+        let (response, _) = client.send_request(request, true).unwrap();
+        h2.drive(response).await.unwrap();
+    };
+
+    join(srv, h2).await;
+}
+
 const SETTINGS: &'static [u8] = &[0, 0, 0, 4, 0, 0, 0, 0, 0];
 const SETTINGS_ACK: &'static [u8] = &[0, 0, 0, 4, 1, 0, 0, 0, 0];