Tools: Rewrite build system unit tests to python - cmake libraries and Kconfig

tools/test_build_system/test_components.py

@@ -0,0 +1,32 @@
+# SPDX-FileCopyrightText: 2023 Espressif Systems (Shanghai) CO LTD
+# SPDX-License-Identifier: Apache-2.0
+
+import logging
+import shutil
+from pathlib import Path
+
+import pytest
+from test_build_system_helpers import IdfPyFunc, replace_in_file
+
+
+def test_component_extra_dirs(idf_py: IdfPyFunc, test_app_copy: Path) -> None:
+    logging.info('Setting EXTRA_COMPONENT_DIRS works')
+    shutil.move(test_app_copy / 'main', test_app_copy / 'different_main' / 'main')
+    replace_in_file((test_app_copy / 'CMakeLists.txt'), '# placeholder_before_include_project_cmake',
+                    'set(EXTRA_COMPONENT_DIRS {})'.format(Path('different_main', 'main')))
+    ret = idf_py('reconfigure')
+    assert str(test_app_copy / 'different_main' / 'main') in ret.stdout
+    assert str(test_app_copy / 'main') not in ret.stdout
+
+
+@pytest.mark.usefixtures('test_app_copy')
+def test_component_nonexistent_extra_dirs_not_allowed(idf_py: IdfPyFunc) -> None:
+    ret = idf_py('reconfigure', '-DEXTRA_COMPONENT_DIRS="nonexistent_dir"', check=False)
+    assert ret.returncode != 0
+
+
+def test_component_names_contain_spaces(idf_py: IdfPyFunc, test_app_copy: Path) -> None:
+    logging.info('Component names may contain spaces')
+    (test_app_copy / 'extra component').mkdir()
+    (test_app_copy / 'extra component' / 'CMakeLists.txt').write_text('idf_component_register')
+    idf_py('-DEXTRA_COMPONENT_DIRS="extra component;main"')