test: test for logging function

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

diff --git a/test/test-libevdev-init.c b/test/test-libevdev-init.c
index 8f1d0d1..02dfa8b 100644 (file)
--- a/test/test-libevdev-init.c
+++ b/test/test-libevdev-init.c
@@ -93,10 +93,16 @@ START_TEST(test_init_and_change_fd)
 }
 END_TEST
 
+
+static int log_fn_called = 0;
+static char *logdata = "test";
 static void logfunc(enum libevdev_log_priority priority,
                    void *data,
                    const char *file, int line, const char *func,
-                   const char *f, va_list args) {}
+                   const char *f, va_list args) {
+       ck_assert_int_eq(strcmp(logdata, data), 0);
+       log_fn_called++;
+}
 
 START_TEST(test_log_init)
 {
@@ -107,16 +113,23 @@ START_TEST(test_log_init)
 
        dev = libevdev_new();
        ck_assert(dev != NULL);
-       libevdev_set_log_function(logfunc, NULL);
-       libevdev_free(dev);
 
-       dev = libevdev_new();
-       ck_assert(dev != NULL);
+       libevdev_set_log_function(logfunc, logdata);
+       libevdev_next_event(dev, LIBEVDEV_READ_NORMAL, NULL);
+
        libevdev_set_log_function(NULL, NULL);
-       libevdev_set_log_function(logfunc, NULL);
-       libevdev_free(dev);
-       /* well, we didn't crash. can't test this otherwise */
+       libevdev_next_event(dev, LIBEVDEV_READ_NORMAL, NULL);
 
+       libevdev_set_log_function(logfunc, logdata);
+       libevdev_next_event(dev, LIBEVDEV_READ_NORMAL, NULL);
+
+       /* libevdev_next_event(dev, LIBEVDEV_READ_NORMAL, NULL) should
+          trigger a log message. We called it three times, but only twice
+          with the logfunc set, thus, ensure we only called the logfunc
+          twice */
+       ck_assert_int_eq(log_fn_called, 2);
+
+       libevdev_free(dev);
 }
 END_TEST