val extension =
      Extension(
        BASIC_CONSTRAINTS,
        false,
        BasicConstraints(true, 4),
      )
    val bytes = "300f0603551d13040830060101ff020104".decodeHex()

    assertThat(CertificateAdapters.extension.toDer(extension))
      .isEqualTo(bytes)
    assertThat(CertificateAdapters.extension.fromDer(bytes))
      .isEqualTo(extension)
  }