fn header_block_encoder_huffman()

in neqo-qpack/src/encoder.rs [801:872]

• 60 lines of code
• 2 McCabe index (conditional complexity)

    fn header_block_encoder_huffman() {
        let test_cases: [TestElement; 6] = [
            // test a header with ref to static - encode_indexed
            TestElement {
                headers: vec![Header::new(":method", "GET")],
                header_block: &[0x00, 0x00, 0xd1],
                encoder_inst: &[],
            },
            // test encode_literal_with_name_ref
            TestElement {
                headers: vec![Header::new(":path", "/somewhere")],
                header_block: &[
                    0x00, 0x00, 0x51, 0x87, 0x61, 0x07, 0xa4, 0xbe, 0x27, 0x2d, 0x85,
                ],
                encoder_inst: &[],
            },
            // test adding a new header and encode_post_base_index, also test
            // fix_header_block_prefix
            TestElement {
                headers: vec![Header::new("my-header", "my-value")],
                header_block: &[0x02, 0x80, 0x10],
                encoder_inst: &[
                    0x67, 0xa7, 0xd2, 0xd3, 0x94, 0x72, 0x16, 0xcf, 0x86, 0xa7, 0xd2, 0xdd, 0xc7,
                    0x45, 0xa5,
                ],
            },
            // test encode_indexed with a ref to dynamic table.
            TestElement {
                headers: vec![Header::new("my-header", "my-value")],
                header_block: ENCODE_INDEXED_REF_DYNAMIC,
                encoder_inst: &[],
            },
            // test encode_literal_with_name_ref.
            TestElement {
                headers: vec![Header::new("my-header", "my-value2")],
                header_block: &[
                    0x02, 0x00, 0x40, 0x87, 0xa7, 0xd2, 0xdd, 0xc7, 0x45, 0xa5, 0x17,
                ],
                encoder_inst: &[],
            },
            // test multiple headers
            TestElement {
                headers: vec![
                    Header::new(":method", "GET"),
                    Header::new(":path", "/somewhere"),
                    Header::new(":authority", "example.com"),
                    Header::new(":scheme", "https"),
                ],
                header_block: &[
                    0x00, 0x01, 0xd1, 0x51, 0x87, 0x61, 0x07, 0xa4, 0xbe, 0x27, 0x2d, 0x85, 0x50,
                    0x88, 0x2f, 0x91, 0xd3, 0x5d, 0x05, 0x5c, 0x87, 0xa7, 0xd7,
                ],
                encoder_inst: &[],
            },
        ];

        let mut encoder = connect(true);

        encoder.encoder.set_max_blocked_streams(100).unwrap();
        encoder.encoder.set_max_capacity(200).unwrap();

        // test the change capacity instruction.
        encoder.send_instructions(CAP_INSTRUCTION_200);

        for t in &test_cases {
            let buf = encoder
                .encoder
                .encode_header_block(&mut encoder.conn, &t.headers, STREAM_1);
            assert_eq!(&buf[..], t.header_block);
            encoder.send_instructions(t.encoder_inst);
        }
    }