tests/shell_lock: add test

tests/shell_lock/Makefile

@@ -0,0 +1,28 @@
+DEVELHELP=0
+include ../Makefile.tests_common
+
+USEMODULE += shell
+USEMODULE += shell_commands
+
+USEMODULE += shell_lock
+USEMODULE += shell_lock_auto_locking
+
+CFLAGS += -DCONFIG_SHELL_LOCK_PASSWORD=\"password\"
+CFLAGS += -DCONFIG_SHELL_LOCK_AUTO_LOCK_TIMEOUT_MS=7000
+
+# This config defaults to 1 on native, such that pm_off() would be called as soon as
+# shell_run_once is terminated in shell_run_forever. We do not want this behavior for this test.
+CFLAGS += -DCONFIG_SHELL_SHUTDOWN_ON_EXIT=0
+
+# for z1, socat doesn't work (unknown reason)
+ifeq (z1, $(BOARD))
+  RIOT_TERMINAL ?= pyterm
+endif
+
+# Use a terminal that does not introduce extra characters into the stream.
+RIOT_TERMINAL ?= socat
+
+include $(RIOTBASE)/Makefile.include
+
+# the test script skips tests if socat is not used
+$(call target-export-variables,$(RIOT_TERMINAL),RIOT_TERMINAL)

tests/shell_lock/Makefile.ci

@@ -0,0 +1,8 @@
+BOARD_INSUFFICIENT_MEMORY := \
+    arduino-duemilanove \
+    arduino-leonardo \
+    arduino-nano \
+    arduino-uno \
+    atmega328p \
+    nucleo-l011k4 \
+    #

tests/shell_lock/main.c

@@ -0,0 +1,32 @@
+/*
+ * Copyright (C) 2021 Freie Universität Berlin
+ *
+ * This file is subject to the terms and conditions of the GNU Lesser
+ * General Public License v2.1. See the file LICENSE in the top level
+ * directory for more details.
+ */
+
+/**
+ * @file
+ * @brief       Test for the lock behaviour of the shell
+ *
+ * @author      Hendrik van Essen <hendrik.ve@fu-berlin.de>
+ *
+ */
+
+#include <stdio.h>
+
+#include "shell.h"
+
+int main(void)
+{
+    puts("test_shell_lock");
+
+    /* define buffer to be used by the shell */
+    char line_buf[SHELL_DEFAULT_BUFSIZE];
+
+    /* start shell */
+    shell_run(NULL, line_buf, SHELL_DEFAULT_BUFSIZE);
+
+    return 0;
+}

tests/shell_lock/tests/01-run.py

@@ -0,0 +1,99 @@
+#!/usr/bin/env python3
+
+# Copyright (C) 2021 Freie Universität Berlin
+#
+# This file is subject to the terms and conditions of the GNU Lesser
+# General Public License v2.1. See the file LICENSE in the top level
+# directory for more details.
+
+import os
+import sys
+import time
+
+from testrunner import run
+
+PASSWORD_CORRECT = "password"
+PASSWORDS_INCORRECT = [
+    "pass",
+    "word",
+    "asswor",
+    "passw0rd",
+    "password_",
+    "_password"
+]
+
+EXPECTED_HELP = (
+    'Command              Description',
+    '---------------------------------------',
+    'reboot               Reboot the node',
+    'version              Prints current RIOT_VERSION',
+    'pm                   interact with layered PM subsystem',
+    'lock                 Lock the shell'
+)
+
+AUTO_LOCK_TIMEOUT_MS = 7000
+PROMPT = '> '
+BOARD = os.environ['BOARD']
+
+
+def testfunc(child):
+
+    # avoid sending an extra empty line on native.
+    if BOARD == 'native':
+        child.crlf = '\n'
+
+    # unlock
+    child.sendline(PASSWORD_CORRECT)
+    child.expect_exact('Shell was unlocked.')
+    child.expect_exact(PROMPT)
+
+    # check we have access
+    child.sendline('help')
+    for line in EXPECTED_HELP:
+        child.expect_exact(line)
+
+    # lock
+    child.sendline('lock')
+    child.expect(PROMPT)
+
+    # trigger password prompt
+    child.sendline('help')
+    child.expect('The shell is locked. Enter a valid password to unlock.')
+    child.expect('Password:')
+
+    # test different incorrect passwords
+    for i, pwd in enumerate(PASSWORDS_INCORRECT):
+
+        # every third incorrect attempt leads to 7 second of sleep, otherwise
+        # just 1 second
+        if i > 0 and i % 3 == 0:
+            timeout = 7
+        else:
+            timeout = 1
+
+        # some boards react quite slow, give them 2 extra seconds
+        child.expect_exact(PROMPT, timeout=(timeout + 2))
+        child.sendline(pwd)
+        child.expect_exact('Wrong password')
+
+    # unlock
+    child.sendline(PASSWORD_CORRECT)
+    child.expect_exact('Shell was unlocked.')
+    child.expect_exact(PROMPT)
+
+    # check we have access
+    child.sendline('help')
+    for line in EXPECTED_HELP:
+        child.expect_exact(line)
+
+    # wait until auto_lock locks the shell after
+    # CONFIG_SHELL_LOCK_AUTO_LOCK_TIMEOUT_MS (+ 1 second buffer time)
+    time.sleep((AUTO_LOCK_TIMEOUT_MS / 1000.0) + 1)
+
+    # trigger password prompt
+    child.sendline('help')
+    child.expect('The shell is locked. Enter a valid password to unlock.')
+
+
+if __name__ == "__main__":
+    sys.exit(run(testfunc))