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-# Copyright (c) 2016 DENX Software Engineering GmbH
-# Heiko Schocher <hs@denx.de>
-#
-# SPDX-License-Identifier:	GPL-2.0+
-#
-
-write a new testcase
-=====================
-
-A TC is written in python, so you can use python as usual. For accessing
-the boards console, use functions from the tbotlib, therefore
-
-First import the tbotlib with the line:
-
-  from tbotlib import tbot
-
-If your TC uses variables, please add a line which adds them to
-the log file (for debugging purposes):
-
-  logging.info("args: %s ...", tb.varname, ...)
-
-Say tbot, for which board state your TC is valid with:
-
-  tb.set_board_state("u-boot")
-
-Then you are ready ... and you can use the tbotlib funtions
-for writting/reading to the boards console.
-
-Big fat warning:
-
-A TC must worry about to end only if a board has finished the shell
-command!
-
-Not following this rule, will end in unpredictable behaviour.
-
-(hopefully) useful tbotlib functions
-====================================
-- set the board state, you want to test
-  tb.set_board_state(state)
-  states are: "u-boot" or "linux"
-  If tbot could not set the board state, tbot ends with failure.
-
-- write a command to the boards console:
-  tb.eof_write_con(command):
-    write the command to the boards console. If this
-    fails, tbot ends with failure
-
-- write a command to boards console and wait for prompt:
-  tb.eof_write_cmd(fd, command):
-    fd: filedescriptor which is used, use tb.channel_con for boards console
-    command: command which is written to fd
-
-    Wait endless for board prompt
-
-- write a list of commands to boards console:
-  tb.eof_write_cmd_list(fd, cmdlist):
-    fd: filedescriptor which is used, use tb.channel_con for boards console
-    cmdlist: python list of commandstrings which is written to fd
-
-- wait for boards prompt:
-  tb.eof_read_end_state_con(retry):
-    retry: deprecated, not used anymore, cleanup needed here...
-    tbot waits endless for the boards prompt
-
-- write a command, wait for prompt and check, if a string is read
-  tb.write_cmd_check(fd, cmd, string):
-    fd: filedescriptor which is used, use tb.channel_con for boards console
-    cmd: command, which is send to fd
-    string: string which should be read from fd
-
-    return value:
-      True, if string is read and tbot got back boards prompt
-      False, else
-
-  tb.eof_write_cmd_check(fd, cmd, string):
-    same as tb.write_cmd_check(fd, cmd, string) except, that tbot
-    ends immediately with Failure, if string is not read.
-
-- read until prompt and search strings:
-  tb.readline_and_search_strings(fd, strings):
-    fd: filedescriptor which is used, use tb.channel_con for boards console
-    strings: python list of strings, which can be read
-      If one of this strings is read, this function return the index, which
-      string is read. This function shoud be called in a while loop,
-      until this function returns 'prompt'
-
-- read a line from filedescriptor:
-  not recommended to use, as the TC must check, if tprompt is read for every
-  readen line. Also TC must ensure, that it ends only, if prompt is read.
-  tb.read_line(fd, retry)
-    fd: filedescriptor which is used, use tb.channel_con for boards console
-    retry: retry of trying to reead a line
-
-  return values:
-    True, if a line is read. Readen line in tb.buf[fd]
-    False, if something read, but not a complete line
-    None, if nothing is read
-
-  check if string contains prompt with:
-  tb.is_end_fd(fd, string)
-    fd: filedescriptor which is used, use tb.channel_con for boards console
-    string: buffer, in which a prompt gets searched.
-
-- calling other TC:
-  eof_call_tc(name):
-    call another TC from "src/tc"
-    if the called TC fails with failure, tbot ends with failure
-
-  call_tc(name):
-    call another TC from "src/tc"
-    if the TC which call_tc calls  fails, call_tc() returns False, else True
-
-There are more functions, but for writting TC this should be enough. But
-its software, so new useful functions can always pop up.
-
-Heiko Schocher <hs@denx.de>
-v1 2016.01.23