text: /**
   * Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
   * SPDX-License-Identifier: Apache-2.0.
   */
  
  #include <aws/common/byte_buf.h>
  #include <proof_helpers/make_common_data_structures.h>
  
  void aws_byte_buf_write_be16_harness() {
      /* parameters */
      struct aws_byte_buf buf;
      uint16_t x;
  
      /* assumptions */
      __CPROVER_assume(aws_byte_buf_is_bounded(&buf, MAX_BUFFER_SIZE));
      ensure_byte_buf_has_allocated_buffer_member(&buf);
      __CPROVER_assume(aws_byte_buf_is_valid(&buf));
  
      /* save current state of the parameters */
      struct aws_byte_buf old = buf;
      struct store_byte_from_buffer old_byte_from_buf;
      save_byte_from_array(buf.buffer, buf.len, &old_byte_from_buf);
  
      /* operation under verification */
      if (aws_byte_buf_write_be16(&buf, x)) {
          assert(buf.len == old.len + 2);
          assert(old.capacity == buf.capacity);
          assert(old.allocator == buf.allocator);
      } else {
          assert_byte_buf_equivalence(&buf, &old, &old_byte_from_buf);
      }
  
      assert(aws_byte_buf_is_valid(&buf));
  }
  