tests: Add a very basic test suite for gio-tool

It gives nowhere near full coverage, but it’s something we can build on
in future.

Signed-off-by: Philip Withnall <philip@tecnocode.co.uk>

Helps: #3158
Helps: #2950

gio/meson.build

@@ -985,7 +985,7 @@ gio_tool_sources = [
   'gio-tool-tree.c',
 ]
 
-executable('gio', gio_tool_sources,
+gio_tool = executable('gio', gio_tool_sources,
   install : true,
   install_tag : 'bin',
   c_args : gio_c_args,

gio/tests/gio-tool.py

@@ -0,0 +1,124 @@
+#!/usr/bin/python3
+# -*- coding: utf-8 -*-
+#
+# Copyright © 2018, 2019 Endless Mobile, Inc.
+# Copyright © 2023 Philip Withnall
+#
+# SPDX-License-Identifier: LGPL-2.1-or-later
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+# MA  02110-1301  USA
+
+"""Integration tests for the gio utility."""
+
+import collections
+import os
+import shutil
+import subprocess
+import tempfile
+import unittest
+
+import taptestrunner
+
+
+Result = collections.namedtuple("Result", ("info", "out", "err"))
+
+
+class TestGioTool(unittest.TestCase):
+    """Integration test for running the gio tool.
+
+    This can be run when installed or uninstalled. When uninstalled, it
+    requires G_TEST_BUILDDIR and G_TEST_SRCDIR to be set.
+
+    The idea with this test harness is to test the gio utility, its
+    handling of command line arguments, its exit statuses, and its actual
+    effects on the file system.
+    """
+
+    # Track the cwd, we want to back out to that to clean up our tempdir
+    cwd = ""
+
+    def setUp(self):
+        self.timeout_seconds = 6  # seconds per test
+        self.tmpdir = tempfile.TemporaryDirectory()
+        self.cwd = os.getcwd()
+        os.chdir(self.tmpdir.name)
+        print("tmpdir:", self.tmpdir.name)
+
+        ext = ""
+        if os.name == "nt":
+            ext = ".exe"
+
+        if "G_TEST_BUILDDIR" in os.environ:
+            self.__gio = os.path.join(
+                os.environ["G_TEST_BUILDDIR"],
+                "..",
+                "gio" + ext,
+            )
+        else:
+            self.__gio = shutil.which("gio" + ext)
+        print("gio:", self.__gio)
+
+    def tearDown(self):
+        os.chdir(self.cwd)
+        self.tmpdir.cleanup()
+
+    def runGio(self, *args):
+        argv = [self.__gio]
+        argv.extend(args)
+        print("Running:", argv)
+
+        env = os.environ.copy()
+        env["LC_ALL"] = "C.UTF-8"
+        env["G_DEBUG"] = "fatal-warnings"
+        print("Environment:", env)
+
+        # We want to ensure consistent line endings...
+        info = subprocess.run(
+            argv,
+            timeout=self.timeout_seconds,
+            stdout=subprocess.PIPE,
+            stderr=subprocess.PIPE,
+            env=env,
+            universal_newlines=True,
+        )
+        info.check_returncode()
+        out = info.stdout.strip()
+        err = info.stderr.strip()
+
+        result = Result(info, out, err)
+
+        print("Output:", result.out)
+        return result
+
+    def test_help(self):
+        """Test the --help argument and help subcommand."""
+        result = self.runGio("--help")
+        result2 = self.runGio("help")
+
+        self.assertEqual(result.out, result2.out)
+        self.assertEqual(result.err, result2.err)
+
+        self.assertIn("Usage:\n  gio COMMAND", result.out)
+        self.assertIn("List the contents of locations", result.out)
+
+    def test_no_args(self):
+        """Test running with no arguments at all."""
+        with self.assertRaises(subprocess.CalledProcessError):
+            self.runGio()
+
+
+if __name__ == "__main__":
+    unittest.main(testRunner=taptestrunner.TAPTestRunner())

gio/tests/meson.build

@@ -181,6 +181,10 @@ python_tests = {
     'suite': ['gdbus-codegen', 'slow'],
     'timeout': 90,
   },
+  'gio-tool.py' : {
+    'depends' : gio_tool,
+    'can_fail' : host_system == 'windows',
+  },
 }
 
 test_env = environment()