tools: add a test for tool option parsing

We don't check for correctness in the output as such, just that whatever
combination of cmdline arguments still works/doesn't work. This is the
scaffolding and a few tests, but needs to be filled in, especially for
libinput measure and for some more complex combinations.

valgrind: requires one more python-related suppression
gitlab-ci: requires another environment variable so we know to skip the
	   --device tests (udev will time out on those)
meson: skip the test run in release builds, we pass the full path to the built
       libinput tool but rely on the subtool lookup that won't work in a
       release build

Fixes #174

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>

4 files changed, 242 insertions, 6 deletions

diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 53ecf10c..eec286b3 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -56,6 +56,8 @@ variables:
   FREEBSD_DOCKER_IMAGE: $CI_REGISTRY/libinput/$CI_PROJECT_NAME/freebsd/11.2
   # Until we have a VM with full access, we cannot run the test suite runner
   SKIP_LIBINPUT_TEST_SUITE_RUNNER: 1
+  # udev isn't available/working properly in the containers
+  UDEV_NOT_AVAILABLE: 1
   # When using docker-in-docker (dind), it's wise to use the overlayfs driver
   # for improved performance.
   DOCKER_DRIVER: overlay2
diff --git a/meson.build b/meson.build
index c9f78144..321e625a 100644
--- a/meson.build
+++ b/meson.build
@@ -577,12 +577,12 @@ endif
 
 libinput_sources = [ 'tools/libinput-tool.c' ]
 
-executable('libinput',
-	   libinput_sources,
-	   dependencies : deps_tools,
-	   include_directories : [includes_src, includes_include],
-	   install : true
-	   )
+libinput_tool = executable('libinput',
+			   libinput_sources,
+			   dependencies : deps_tools,
+			   include_directories : [includes_src, includes_include],
+			   install : true
+			  )
 configure_file(input : 'tools/libinput.man',
 	       output : 'libinput.1',
 	       configuration : man_config,
@@ -598,6 +598,14 @@ executable('ptraccel-debug',
 	   install : false
 	   )
 
+# Don't run the test during a release build because we rely on the magic
+# subtool lookup
+if get_option('buildtype') == 'debug' or get_option('buildtype') == 'debugoptimized'
+	test('tool-option-parsing',
+	     find_program('tools/test-tool-option-parsing.py'),
+	     args : [libinput_tool.full_path()])
+endif
+
 # the libinput tools check whether we execute from the builddir, this is
 # the test to verify that lookup. We test twice, once as normal test
 # run from the builddir, once after copying to /tmp
diff --git a/test/valgrind.suppressions b/test/valgrind.suppressions
index 6a4f4271..5e6add52 100644
--- a/test/valgrind.suppressions
+++ b/test/valgrind.suppressions
@@ -70,3 +70,9 @@
    ...
    fun:execute_command
 }
+{
+   python:Py_GetProgramFullPath
+   Memcheck:Cond
+   ...
+   fun:Py_GetProgramFullPath
+}
diff --git a/tools/test-tool-option-parsing.py b/tools/test-tool-option-parsing.py
new file mode 100755
index 00000000..b6f845e8
--- /dev/null
+++ b/tools/test-tool-option-parsing.py
@@ -0,0 +1,220 @@
+#!/usr/bin/python3
+# vim: set expandtab shiftwidth=4:
+# -*- Mode: python; coding: utf-8; indent-tabs-mode: nil -*- */
+#
+# Copyright © 2018 Red Hat, Inc.
+#
+# Permission is hereby granted, free of charge, to any person obtaining a
+# copy of this software and associated documentation files (the "Software"),
+# to deal in the Software without restriction, including without limitation
+# the rights to use, copy, modify, merge, publish, distribute, sublicense,
+# and/or sell copies of the Software, and to permit persons to whom the
+# Software is furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice (including the next
+# paragraph) shall be included in all copies or substantial portions of the
+# Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+# THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+# DEALINGS IN THE SOFTWARE.
+
+import argparse
+import os
+import unittest
+import sys
+import subprocess
+import time
+
+
+class TestLibinputTool(unittest.TestCase):
+    libinput_tool = 'libinput'
+    subtool = None
+
+    def run_command(self, args):
+        args = [self.libinput_tool] + args
+        if self.subtool is not None:
+            args.insert(1, self.subtool)
+
+        with subprocess.Popen(args, stdout=subprocess.PIPE, stderr=subprocess.PIPE) as p:
+            time.sleep(0.1)
+            p.send_signal(2)
+            p.wait()
+            return p.returncode, p.stdout.read().decode('UTF-8'), p.stderr.read().decode('UTF-8')
+
+    def run_command_success(self, args):
+        rc, stdout, stderr = self.run_command(args)
+        # if we're running as user, we might fail the command but we should
+        # never get rc 2 (invalid usage)
+        self.assertIn(rc, [0, 1])
+
+    def run_command_unrecognised_option(self, args):
+        rc, stdout, stderr = self.run_command(args)
+        self.assertEqual(rc, 2)
+        self.assertTrue(stdout.startswith('Usage') or stdout == '')
+        self.assertIn('unrecognized option', stderr)
+
+    def run_command_missing_arg(self, args):
+        rc, stdout, stderr = self.run_command(args)
+        self.assertEqual(rc, 2)
+        self.assertTrue(stdout.startswith('Usage') or stdout == '')
+        self.assertIn('requires an argument', stderr)
+
+    def run_command_unrecognised_tool(self, args):
+        rc, stdout, stderr = self.run_command(args)
+        self.assertEqual(rc, 2)
+        self.assertTrue(stdout.startswith('Usage') or stdout == '')
+        self.assertIn('is not a libinput command', stderr)
+
+
+class TestLibinputCommand(TestLibinputTool):
+    subtool = None
+
+    def test_help(self):
+        rc, stdout, stderr = self.run_command(['--help'])
+        self.assertEqual(rc, 0)
+        self.assertTrue(stdout.startswith('Usage:'))
+        self.assertEqual(stderr, '')
+
+    def test_version(self):
+        rc, stdout, stderr = self.run_command(['--version'])
+        self.assertEqual(rc, 0)
+        self.assertTrue(stdout.startswith('1'))
+        self.assertEqual(stderr, '')
+
+    def test_invalid_arguments(self):
+        self.run_command_unrecognised_option(['--banana'])
+        self.run_command_unrecognised_option(['--foo'])
+        self.run_command_unrecognised_option(['--quiet'])
+        self.run_command_unrecognised_option(['--verbose'])
+        self.run_command_unrecognised_option(['--quiet', 'foo'])
+
+    def test_invalid_tools(self):
+        self.run_command_unrecognised_tool(['foo'])
+        self.run_command_unrecognised_tool(['debug'])
+        self.run_command_unrecognised_tool(['foo', '--quiet'])
+
+
+class TestToolWithOptions(object):
+    options = {
+            'pattern': ['sendevents'],
+            # enable/disable options
+            'enable-disable': [
+                        'tap',
+                        'drag',
+                        'drag-lock',
+                        'middlebutton',
+                        'natural-scrolling',
+                        'left-handed',
+                        'dwt'
+            ],
+            # options with distinct values
+            'enums': {
+                'set-click-method': ['none', 'clickfinger', 'buttonareas'],
+                'set-scroll-method': ['none', 'twofinger', 'edge', 'button'],
+                'set-profile': ['adaptive', 'flat'],
+                'set-tap-map': ['lrm', 'lmr'],
+            },
+            # options with a range
+            'ranges': {
+                'set-speed': (float, -1.0, +1.0),
+            }
+    }
+
+    def test_udev_seat(self):
+        self.run_command_missing_arg(['--udev'])
+        self.run_command_success(['--udev', 'seat0'])
+        self.run_command_success(['--udev', 'seat1'])
+
+    @unittest.skipIf(os.environ.get('UDEV_NOT_AVAILABLE'), "udev required")
+    def test_device(self):
+        self.run_command_missing_arg(['--device'])
+        self.run_command_success(['--device', '/dev/input/event0'])
+        self.run_command_success(['--device', '/dev/input/event1'])
+
+    def test_options_pattern(self):
+        for option in self.options['pattern']:
+            self.run_command_success(['--disable-{}'.format(option), '*'])
+            self.run_command_success(['--disable-{}'.format(option), 'abc*'])
+
+    def test_options_enable_disable(self):
+        for option in self.options['enable-disable']:
+            self.run_command_success(['--enable-{}'.format(option)])
+            self.run_command_success(['--disable-{}'.format(option)])
+
+    def test_options_enums(self):
+        for option, values in self.options['enums'].items():
+            for v in values:
+                self.run_command_success(['--{}'.format(option), v])
+                self.run_command_success(['--{}={}'.format(option, v)])
+
+    def test_options_ranges(self):
+        for option, values in self.options['ranges'].items():
+            range_type, minimum, maximum = values
+            self.assertEqual(range_type, float)
+            step = (maximum - minimum)/10.0
+            value = minimum
+            while value < maximum:
+                self.run_command_success(['--{}'.format(option), str(value)])
+                self.run_command_success(['--{}={}'.format(option, value)])
+                value += step
+            self.run_command_success(['--{}'.format(option), str(maximum)])
+            self.run_command_success(['--{}={}'.format(option, maximum)])
+
+
+class TestDebugEvents(TestToolWithOptions, TestLibinputTool):
+    subtool = 'debug-events'
+
+    def test_verbose_quiet(self):
+        rc, stdout, stderr = self.run_command(['--verbose'])
+        self.assertEqual(rc, 0)
+        rc, stdout, stderr = self.run_command(['--quiet'])
+        self.assertEqual(rc, 0)
+        rc, stdout, stderr = self.run_command(['--verbose', '--quiet'])
+        self.assertEqual(rc, 0)
+        rc, stdout, stderr = self.run_command(['--quiet', '--verbose'])
+        self.assertEqual(rc, 0)
+
+    def test_invalid_arguments(self):
+        self.run_command_unrecognised_option(['--banana'])
+        self.run_command_unrecognised_option(['--foo'])
+        self.run_command_unrecognised_option(['--version'])
+
+
+class TestDebugGUI(TestToolWithOptions, TestLibinputTool):
+    subtool = 'debug-gui'
+
+    @classmethod
+    def setUpClass(cls):
+        if not os.getenv('DISPLAY') and not os.getenv('WAYLAND_DISPLAY'):
+            raise unittest.SkipTest()
+
+    def test_verbose_quiet(self):
+        rc, stdout, stderr = self.run_command(['--verbose'])
+        self.assertEqual(rc, 0)
+
+    def test_invalid_arguments(self):
+        self.run_command_unrecognised_option(['--quiet'])
+        self.run_command_unrecognised_option(['--banana'])
+        self.run_command_unrecognised_option(['--foo'])
+        self.run_command_unrecognised_option(['--version'])
+
+
+if __name__ == '__main__':
+    parser = argparse.ArgumentParser(description='Verify a libinput tool\'s option parsing')
+    parser.add_argument('tool_path', metavar='/path/to/builddir/libinput',
+                        type=str, nargs='?',
+                        help='Path to the libinput tool in the builddir')
+    parser.add_argument('--verbose', action='store_true')
+    args = parser.parse_args()
+    if args.tool_path is not None:
+        TestLibinputTool.libinput_tool = args.tool_path
+    verbosity = 1
+    if args.verbose:
+        verbosity = 3
+    del sys.argv[1:]
+    unittest.main(verbosity=verbosity)