tests/hd-geo-test: Skip test when images can not be created

In certain environments like restricted containers, we can not create
huge test images. To be able to use "make check" in such container
environments, too, let's skip the hd-geo-test instead of failing when
the test images could not be created.

Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20191204154618.23560-5-thuth@redhat.com>

tests/hd-geo-test.c

@@ -34,8 +34,13 @@ static char *create_test_img(int secs)
     fd = mkstemp(template);
     g_assert(fd >= 0);
     ret = ftruncate(fd, (off_t)secs * 512);
-    g_assert(ret == 0);
     close(fd);
+
+    if (ret) {
+        free(template);
+        template = NULL;
+    }
+
     return template;
 }
 
@@ -934,6 +939,10 @@ int main(int argc, char **argv)
     for (i = 0; i < backend_last; i++) {
         if (img_secs[i] >= 0) {
             img_file_name[i] = create_test_img(img_secs[i]);
+            if (!img_file_name[i]) {
+                g_test_message("Could not create test images.");
+                goto test_add_done;
+            }
         } else {
             img_file_name[i] = NULL;
         }
@@ -965,6 +974,7 @@ int main(int argc, char **argv)
                        "skipping hd-geo/override/* tests");
     }
 
+test_add_done:
     ret = g_test_run();
 
     for (i = 0; i < backend_last; i++) {