[gtk/css-lookup-caching: 6/26] testsuite: Warn if a necessary env var is missing

[Matthias Clasen <matthiasc src gnome org>]

commit b414df14df35d82d5354fe5a0ef1b4ee8b26c4da
Author: Matthias Clasen <mclasen redhat com>
Date:   Tue Feb 11 14:09:24 2020 -0500

    testsuite: Warn if a necessary env var is missing
    
    Better to warn if we know why the tests are
    going to fail. Saves headscratching later.

 testsuite/gtk/icontheme.c | 9 +++++++++
 1 file changed, 9 insertions(+)
---
diff --git a/testsuite/gtk/icontheme.c b/testsuite/gtk/icontheme.c
index c6c7b638b1..85c120d68b 100644
--- a/testsuite/gtk/icontheme.c
+++ b/testsuite/gtk/icontheme.c
@@ -773,9 +773,18 @@ test_nonsquare_symbolic (void)
   g_object_unref (info);
 }
 
+static void
+require_env (const char *var)
+{
+  if (g_getenv (var) == NULL)
+    g_warning ("Some tests require %s to be set", var);
+}
+
 int
 main (int argc, char *argv[])
 {
+  require_env ("G_TEST_SRCDIR");
+
   gtk_test_init (&argc, &argv);
 
   g_test_add_func ("/icontheme/basics", test_basics);