[gtksourceview] tests: ignore content-type check on __APPLE__

[Christian Hergert <chergert src gnome org>]

commit cc0f94964af137b1e4e7d6e253788b4de069889e
Author: Christian Hergert <chergert redhat com>
Date:   Fri Nov 6 10:41:42 2020 -0800

    tests: ignore content-type check on __APPLE__
    
    This doesn't hold up everywhere depending on the content engine
    behind things in GLib. So we can't guarantee this on Mac.

 testsuite/test-languagemanager.c | 2 ++
 1 file changed, 2 insertions(+)
---
diff --git a/testsuite/test-languagemanager.c b/testsuite/test-languagemanager.c
index d61711f7..ced5ce0f 100644
--- a/testsuite/test-languagemanager.c
+++ b/testsuite/test-languagemanager.c
@@ -178,9 +178,11 @@ test_guess_language (void)
        l = gtk_source_language_manager_guess_language (lm, "foo.c", "text/x-fortran");
        g_assert_cmpstr (gtk_source_language_get_id (l), ==, "c");
 
+#if !defined(__APPLE__)
        /* when content type is a descendent of the mime matched by the glob, mime wins */
        l = gtk_source_language_manager_guess_language (lm, "foo.xml", "application/xslt+xml");
        g_assert_cmpstr (gtk_source_language_get_id (l), ==, "xslt");
+#endif
 }
 
 int