fn test_parse_header_line()

in src/common/headers.rs [582:700]

• 105 lines of code
• 1 McCabe index (conditional complexity)

    fn test_parse_header_line() {
        let mut header = Headers::default();

        // Invalid header syntax.
        assert_eq!(
            header.parse_header_line(b"Expect"),
            Err(RequestError::HeaderError(HttpHeaderError::InvalidFormat(
                "Expect".to_string()
            )))
        );

        // Invalid content length.
        assert_eq!(
            header.parse_header_line(b"Content-Length: five"),
            Err(RequestError::HeaderError(HttpHeaderError::InvalidValue(
                "Content-Length".to_string(),
                " five".to_string()
            )))
        );

        // Invalid transfer encoding.
        assert_eq!(
            header.parse_header_line(b"Transfer-Encoding: gzip"),
            Err(RequestError::HeaderError(
                HttpHeaderError::UnsupportedValue(
                    "Transfer-Encoding".to_string(),
                    " gzip".to_string()
                )
            ))
        );

        // Invalid expect.
        assert_eq!(
            header
                .parse_header_line(b"Expect: 102-processing")
                .unwrap_err(),
            RequestError::HeaderError(HttpHeaderError::UnsupportedValue(
                "Expect".to_string(),
                " 102-processing".to_string()
            ))
        );

        // Unsupported media type.
        assert_eq!(
            header
                .parse_header_line(b"Content-Type: application/json-patch")
                .unwrap_err(),
            RequestError::HeaderError(HttpHeaderError::UnsupportedValue(
                "Content-Type".to_string(),
                " application/json-patch".to_string()
            ))
        );

        // Invalid input format.
        let input: [u8; 10] = [130, 140, 150, 130, 140, 150, 130, 140, 150, 160];
        assert_eq!(
            header.parse_header_line(&input[..]).unwrap_err(),
            RequestError::HeaderError(HttpHeaderError::InvalidUtf8String(
                String::from_utf8(input.to_vec()).unwrap_err().utf8_error()
            ))
        );

        // Test valid transfer encoding.
        assert!(header
            .parse_header_line(b"Transfer-Encoding: chunked")
            .is_ok());
        assert!(header.chunked());

        // Test valid expect.
        assert!(header.parse_header_line(b"Expect: 100-continue").is_ok());
        assert!(header.expect());

        // Test valid media type.
        assert!(header
            .parse_header_line(b"Content-Type: application/json")
            .is_ok());

        // Test valid accept media type.
        assert!(header
            .parse_header_line(b"Accept: application/json")
            .is_ok());
        assert_eq!(header.accept, MediaType::ApplicationJson);
        assert!(header.parse_header_line(b"Accept: text/plain").is_ok());
        assert_eq!(header.accept, MediaType::PlainText);

        // Test invalid accept media type.
        assert!(header
            .parse_header_line(b"Accept: application/json-patch")
            .is_err());

        // Invalid content length.
        assert_eq!(
            header.parse_header_line(b"Content-Length: -1"),
            Err(RequestError::HeaderError(HttpHeaderError::InvalidValue(
                "Content-Length".to_string(),
                " -1".to_string()
            )))
        );

        assert!(header
            .parse_header_line(b"Accept-Encoding: deflate")
            .is_ok());
        assert_eq!(
            header.parse_header_line(b"Accept-Encoding: compress, identity;q=0"),
            Err(RequestError::HeaderError(HttpHeaderError::InvalidValue(
                "Accept-Encoding".to_string(),
                " identity;q=0".to_string()
            )))
        );

        // Test custom header.
        assert_eq!(header.custom_entries().len(), 0);
        assert!(header.parse_header_line(b"Custom-Header: foo").is_ok());
        assert_eq!(
            header.custom_entries().get("Custom-Header").unwrap(),
            &"foo".to_string()
        );
        assert_eq!(header.custom_entries().len(), 1);
    }