psh: add help command test

JIRA: PD-77

psh/test-help.py

@@ -0,0 +1,33 @@
+# Phoenix-RTOS
+#
+# phoenix-rtos-tests
+#
+# psh help command test
+#
+# Copyright 2023 Phoenix Systems
+# Author: Damian Loewnau
+#
+# This file is part of Phoenix-RTOS.
+#
+# %LICENSE%
+#
+
+import psh.tools.psh as psh
+
+# matches any line, for example - 'Available commands:'
+INITIAL_LINE_PATTERN = rf'[^\r\n]+{psh.EOL}'
+# matches command with any explanation + newline
+HELP_LINE_PATTERN = rf'((\s*?)(?P<cmd>\w+)(\s+)-[^\r\n]+{psh.EOL})'
+
+
+@psh.run
+def harness(p):
+    # asserts that at least 15 help commands are displayed in proper format
+    psh.assert_cmd(p,
+                   'help',
+                   expected=rf'{INITIAL_LINE_PATTERN}{HELP_LINE_PATTERN}{{15,}}', is_regex=True)
+
+    # psh help does not fail when passing arguments
+    psh.assert_cmd(p,
+                   'help -a arg1 --arg2 -arg3',
+                   expected=rf'{INITIAL_LINE_PATTERN}{HELP_LINE_PATTERN}{{15,}}', is_regex=True)

psh/test.yaml

@@ -72,3 +72,6 @@ test:
 
         - name: history
           harness: test-history.py
+
+        - name: help
+          harness: test-help.py