[libgudev/benzea/fix-newline-stripping] tests: Add helper function to setup single device environment

[Benjamin Berg <bberg src gnome org>]

commit 2ec19e87e78831ed7bfb7a40bf50227de3100a6b
Author: Benjamin Berg <bberg redhat com>
Date:   Tue May 31 18:38:13 2022 +0200

    tests: Add helper function to setup single device environment
    
    Just to make it a bit nicer, no need to assert the number of devices
    each time and such.

 tests/test-sysfsattr.c | 40 +++++++++++++++++++++++++++++-----------
 1 file changed, 29 insertions(+), 11 deletions(-)
---
diff --git a/tests/test-sysfsattr.c b/tests/test-sysfsattr.c
index 13f4a5b..de38760 100644
--- a/tests/test-sysfsattr.c
+++ b/tests/test-sysfsattr.c
@@ -27,6 +27,28 @@ fixture_setup (Fixture *f, G_GNUC_UNUSED const void *data)
        g_assert (umockdev_in_mock_environment ());
 }
 
+static GUdevDevice*
+create_single_dev (Fixture *f, const char *device)
+{
+       g_autoptr(GError) error = NULL;
+       g_autoptr(GUdevClient) client = NULL;
+       g_autolist(GUdevDevice) devices;
+       GUdevDevice *dev;
+
+       if (!umockdev_testbed_add_from_string (f->testbed, device, &error))
+               g_error ("Failed to add test device: %s", error->message);
+
+       client = g_udev_client_new (NULL);
+
+       devices = g_udev_client_query_by_subsystem (client, NULL);
+       g_assert_cmpint (g_list_length (devices), ==, 1);
+
+       dev = devices->data;
+       devices = g_list_delete_link (devices, devices);
+
+       return dev;
+}
+
 static void
 fixture_teardown (Fixture *f, G_GNUC_UNUSED const void *data)
 {
@@ -36,21 +58,17 @@ fixture_teardown (Fixture *f, G_GNUC_UNUSED const void *data)
 static void
 test_uncached_sysfs_attr (Fixture *f, G_GNUC_UNUSED const void *data)
 {
-       umockdev_testbed_add_device (f->testbed, "platform", "dev1", NULL,
-                                    "dytc_lapmode", "1", "console", "Y\n", NULL,
-                                    "ID_MODEL", "KoolGadget", NULL);
-
-       /* Check the number of items in GUdevClient */
-       const gchar *subsystems[] = { "platform", NULL};
-       GUdevClient *client = g_udev_client_new (subsystems);
-       GUdevDevice *dev;
+       g_autoptr(GUdevDevice) dev = NULL;
        g_autofree char *lapmode_path = NULL;
        g_autofree char *console_path = NULL;
        FILE *sysfsfp;
 
-       GList *devices = g_udev_client_query_by_subsystem (client, NULL);
-       g_assert_cmpint (g_list_length (devices), ==, 1);
-       dev = devices->data;
+       dev = create_single_dev (f, "P: /devices/dev1\n"
+                                   "E: SUBSYSTEM=platform\n"
+                                   "A: dytc_lapmode=1\n"
+                                   "A: console=Y\\n\n"
+                                   "E: ID_MODEL=KoolGadget");
+
        lapmode_path = g_build_filename (g_udev_device_get_sysfs_path (dev), "dytc_lapmode", NULL);
        /* First access */
        g_assert_true (g_udev_device_get_sysfs_attr_as_boolean (dev, "dytc_lapmode"));