tests: Add alias testing

Add simple test cases to verify alias' functionality.

Signed-off-by: Pieter De Gendt <pieter.degendt@basalte.be>

tests/test_alias.py

@@ -0,0 +1,51 @@
+# Copyright (c) 2024, Basalte bv
+
+import os
+
+import pytest
+
+from conftest import cmd
+
+assert 'TOXTEMPDIR' in os.environ, "you must run these tests using tox"
+
+@pytest.fixture(autouse=True)
+def autouse_tmpdir(config_tmpdir, west_init_tmpdir):
+    # Since this module tests west's configuration file features,
+    # adding autouse=True to the config_tmpdir and west_init_tmpdir fixtures
+    # saves typing and is less error-prone than using it below in every test case.
+    pass
+
+def test_alias_commands():
+    cmd('config alias.test1 topdir')
+    cmd('config --global alias.test2 topdir')
+    cmd('config --system alias.test3 topdir')
+
+    topdir_out = cmd('topdir')
+
+    assert cmd('test1') == topdir_out
+    assert cmd('test2') == topdir_out
+    assert cmd('test3') == topdir_out
+
+def test_alias_recursive_commands():
+    cmd('config alias.test1 topdir')
+    cmd('config alias.test2 test1')
+
+    assert cmd('test2') == cmd('topdir')
+
+def test_alias_command_with_arguments():
+    list_format = '{revision}'
+    cmd(f'config alias.revs "list -f \"{list_format}\""')
+
+    assert cmd('revs') == cmd(f'list -f "{list_format}"')
+
+def test_alias_override():
+    before = cmd('list')
+    list_format = '{name}:{revision}'
+    formatted = cmd(f'list -f "{list_format}"')
+
+    cmd(f'config alias.list "list -f \"{list_format}\""')
+
+    after = cmd('list')
+
+    assert before != after
+    assert formatted == after