[libgudev/benzea/fix-newline-stripping] tests: Add helper to write sysfs attribute

[Benjamin Berg <bberg src gnome org>]

commit 2a8e8f869741ceb9546cb31f0a6e5e40f27a9e73
Author: Benjamin Berg <bberg redhat com>
Date:   Tue May 31 18:54:03 2022 +0200

    tests: Add helper to write sysfs attribute
    
    Honestly, we could even add that into the API itself, calling the proper
    underlying udev function.

 tests/test-sysfsattr.c | 29 +++++++++++++++--------------
 1 file changed, 15 insertions(+), 14 deletions(-)
---
diff --git a/tests/test-sysfsattr.c b/tests/test-sysfsattr.c
index 7dcf0dd..dbca3ed 100644
--- a/tests/test-sysfsattr.c
+++ b/tests/test-sysfsattr.c
@@ -55,13 +55,22 @@ fixture_teardown (Fixture *f, G_GNUC_UNUSED const void *data)
        g_clear_object (&f->testbed);
 }
 
+static void
+write_sysfs_attr (GUdevDevice *dev, const char *attr, const char *value)
+{
+       g_autofree char *path = NULL;
+       FILE *sysfsfp;
+
+       path = g_build_filename (g_udev_device_get_sysfs_path (dev), attr, NULL);
+       sysfsfp = fopen (path, "w");
+       fwrite (value, strlen(value), 1, sysfsfp);
+       fclose (sysfsfp);
+}
+
 static void
 test_uncached_sysfs_attr (Fixture *f, G_GNUC_UNUSED const void *data)
 {
        g_autoptr(GUdevDevice) dev = NULL;
-       g_autofree char *lapmode_path = NULL;
-       g_autofree char *console_path = NULL;
-       FILE *sysfsfp;
 
        dev = create_single_dev (f, "P: /devices/dev1\n"
                                    "E: SUBSYSTEM=platform\n"
@@ -69,13 +78,10 @@ test_uncached_sysfs_attr (Fixture *f, G_GNUC_UNUSED const void *data)
                                    "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"));
        g_assert_cmpstr (g_udev_device_get_sysfs_attr (dev, "dytc_lapmode"), ==, "1");
-       sysfsfp = fopen (lapmode_path, "w");
-       fprintf (sysfsfp, "%s\n", "0");
-       fclose (sysfsfp);
+       write_sysfs_attr (dev, "dytc_lapmode", "0\n");
        /* This is cached */
        g_assert_true (g_udev_device_get_sysfs_attr_as_boolean (dev, "dytc_lapmode"));
        /* This is uncached, and updates the cache */
@@ -85,14 +91,9 @@ test_uncached_sysfs_attr (Fixture *f, G_GNUC_UNUSED const void *data)
 
        /* Test N/Y and trailing linefeeds */
        g_assert_true (g_udev_device_get_sysfs_attr_as_boolean (dev, "console"));
-       console_path = g_build_filename (g_udev_device_get_sysfs_path (dev), "console", NULL);
-       sysfsfp = fopen (console_path, "w");
-       fprintf (sysfsfp, "%s\n", "N");
-       fclose (sysfsfp);
+       write_sysfs_attr (dev, "console", "N\n");
        g_assert_false (g_udev_device_get_sysfs_attr_as_boolean_uncached (dev, "console"));
-       sysfsfp = fopen (console_path, "w");
-       fprintf (sysfsfp, "%s\n", "Y");
-       fclose (sysfsfp);
+       write_sysfs_attr (dev, "console", "Y");
        g_assert_true (g_udev_device_get_sysfs_attr_as_boolean_uncached (dev, "console"));
 }