add unit tests for subprocess_util

tests/units/test_subprocess_util.py

@@ -0,0 +1,50 @@
+# Copyright (C) 2023 Maxwell G <[email protected]>
+# SPDX-License-Identifier: GPL-3.0-or-later
+# GNU General Public License v3.0+ (see LICENSES/GPL-3.0-or-later.txt or
+# https://www.gnu.org/licenses/gpl-3.0.txt)
+
+from unittest.mock import MagicMock, call
+
+import antsibull_core.subprocess_util
+
+
+def test_log_run() -> None:
+    logger = MagicMock()
+    args = ('bash', '-ec', 'echo 123 && echo 456 >&2')
+    proc = antsibull_core.subprocess_util.log_run(args, logger)
+    assert proc.args == args
+    assert proc.returncode == 0
+    assert proc.stdout == '123\n'
+    assert proc.stderr == '456\n'
+    calls = [call(f'Running subprocess: {args}'), call('stderr: 456')]
+    assert logger.debug.call_args_list == calls
+
+
+def test_log_run_multi() -> None:
+    logger = MagicMock()
+    command = """
+    for i in {1..15}; do
+        echo "$i: Hello, stdout"
+        echo "$i: Hello, stderr" >&2
+    done
+    """
+    args = ('bash', '-ec', command)
+    proc = antsibull_core.subprocess_util.log_run(args, logger, 'info', 'warn')
+    assert proc.args == args
+    assert proc.returncode == 0
+
+    assert logger.debug.called_once_with(f'Running subprocess: {args}')
+    assert logger.warn.call_count == 15
+    assert logger.info.call_count == 15
+    expected_out: list[str] = []
+    expected_err: list[str] = []
+    for index, inp in enumerate(logger.info.call_args_list):
+        msg = f'{index+1}: Hello, stdout'
+        expected_out.append(msg)
+        assert inp == call('stdout: ' + msg)
+    for index, inp in enumerate(logger.warn.call_args_list):
+        msg = f'{index+1}: Hello, stderr'
+        expected_err.append(msg)
+        assert inp == call('stderr: ' + msg)
+    assert proc.stdout == '\n'.join(expected_out) + '\n'
+    assert proc.stderr == '\n'.join(expected_err) + '\n'