Python scripting: Add a test plan generator script (#32718)

* Python scriptiong: Add a test plan generator script

* Fix linter

* Restyled by isort

* fix spacing

* update spacing on expected outcome

* remove init file - it snuck in, but isn't needed

* Add documnetation and better error reporting.

* make print a little nicer for help

* linter...

* Restyled by isort

* make defined steps function public

---------

Co-authored-by: Restyled.io <commits@restyled.io>

src/python_testing/matter_testing_support.py

@@ -684,10 +684,10 @@ def get_test_steps(self, test: str) -> list[TestStep]:
             in order using self.step(number), where number is the test_plan_number
             from each TestStep.
         '''
-        steps = self._get_defined_test_steps(test)
+        steps = self.get_defined_test_steps(test)
         return [TestStep(1, "Run entire test")] if steps is None else steps
 
-    def _get_defined_test_steps(self, test: str) -> list[TestStep]:
+    def get_defined_test_steps(self, test: str) -> list[TestStep]:
         steps_name = 'steps_' + test[5:]
         try:
             fn = getattr(self, steps_name)
@@ -781,7 +781,7 @@ def setup_test(self):
         self.step_skipped = False
         if self.runner_hook and not self.is_commissioning:
             test_name = self.current_test_info.name
-            steps = self._get_defined_test_steps(test_name)
+            steps = self.get_defined_test_steps(test_name)
             num_steps = 1 if steps is None else len(steps)
             filename = inspect.getfile(self.__class__)
             desc = self.get_test_desc(test_name)
@@ -977,7 +977,7 @@ def on_pass(self, record):
             self.runner_hook.step_success(logger=None, logs=None, duration=step_duration, request=None)
 
         # TODO: this check could easily be annoying when doing dev. flag it somehow? Ditto with the in-order check
-        steps = self._get_defined_test_steps(record.test_name)
+        steps = self.get_defined_test_steps(record.test_name)
         if steps is None:
             # if we don't have a list of steps, assume they were all run
             all_steps_run = True

src/python_testing/test_plan_table_generator.py

@@ -0,0 +1,95 @@
+#!/usr/bin/env -S python3 -B
+#
+#    Copyright (c) 2024 Project CHIP Authors
+#    All rights reserved.
+#
+#    Licensed under the Apache License, Version 2.0 (the "License");
+#    you may not use this file except in compliance with the License.
+#    You may obtain a copy of the License at
+#
+#        http://www.apache.org/licenses/LICENSE-2.0
+#
+#    Unless required by applicable law or agreed to in writing, software
+#    distributed under the License is distributed on an "AS IS" BASIS,
+#    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+#    See the License for the specific language governing permissions and
+#    limitations under the License.
+#
+import importlib
+import logging
+import os
+import sys
+from pathlib import Path
+
+import click
+from matter_testing_support import MatterTestConfig, generate_mobly_test_config
+
+
+def indent_multiline(multiline: str, num_spaces: int) -> str:
+    ''' Indents subsequent lines of a multiline string by num_spaces spaces'''
+    s = multiline.split('\n')
+    s = [(num_spaces * ' ' + line.lstrip()).rstrip() for line in s]
+    return '\n'.join(s).lstrip()
+
+
+@click.command()
+@click.argument('filename', type=click.Path(exists=True))
+@click.argument('classname', type=str)
+@click.argument('test', type=str)
+def main(filename, classname, test):
+    '''
+        This script generates the Test Procedure table for the test plans document
+        from the python script steps. In order to use this generator, the test
+        automation script conform to the following requirements:
+
+            - automated in python\n
+            - test implements the steps_ function to provide steps information to the TH\n
+            - TestStep list returned from the steps_ function includes both description and expectation fields\n
+            - test does not gate any steps on PICS (top level PICS ok)\n
+
+
+        Usage: test_plan_table_generator.py filename classname test
+
+          filename - name of the file where the test is automated\n
+          classname - name of the MatterBaseTest class\n
+          test - name of the test to generate the table for (include the test_ portion)\n
+    '''
+    try:
+        module = importlib.import_module(Path(os.path.basename(filename)).stem)
+    except ModuleNotFoundError:
+        logging.error(f'Unable to load python module from {filename}. Please ensure this is a valid python file path')
+        return -1
+
+    try:
+        test_class = getattr(module, classname)
+    except AttributeError:
+        logging.error(f'Unable to load the test class {classname}. Please ensure this class is implemented in {filename}')
+        return -1
+
+    config = generate_mobly_test_config(MatterTestConfig())
+    test_instance = test_class(config)
+    steps = test_instance.get_defined_test_steps(test)
+    if not steps:
+        logging.error(f'Unable to find steps for test {test}. Please ensure the steps_ function is implemented')
+        return -1
+
+    indent = 6
+    header_num = f'{"**#**":<{indent}}'
+    header_num_step = f'|{header_num} |*TestStep*   '
+    s = ('[cols="5%,45%,45%"]\n'
+         '|===\n'
+         f'{header_num_step}|*Expected Outcome*\n')
+    for step in steps:
+        step_num = f'|{step.test_plan_number:<{indent}}a|'
+        s += f'{step_num}{indent_multiline(step.description, len(step_num))}\n'
+
+        padding = (len(header_num_step) - 1) * ' '
+        # add 2 to indent for a| at start
+        s += f'{padding}a|{indent_multiline(step.expectation, len(padding)+2)}\n\n'
+    s += '|===\n'
+
+    print(s)
+
+
+if __name__ == "__main__":
+    sys.exit(main())