[glib/wip/silviol/gsocket_flags: 1/2] added stream writability checks in pollable unit test

[Silvio Lazzeretti <silviol src gnome org>]

commit ac0706aad0ed6799fdae264541ffdfa040c7f15a
Author: Silvio Lazzeretti <silviola amazon com>
Date:   Thu Dec 13 09:09:34 2018 +0100

    added stream writability checks in pollable unit test
    
    This checks if the stream is writable before writing
    to it. If the write succeeded with no error, then the
    stream has to be also writable after the write

 gio/tests/pollable.c | 4 ++++
 1 file changed, 4 insertions(+)
---
diff --git a/gio/tests/pollable.c b/gio/tests/pollable.c
index 826eaecad..75dca95ae 100644
--- a/gio/tests/pollable.c
+++ b/gio/tests/pollable.c
@@ -65,9 +65,13 @@ write_callback (gpointer user_data)
   gssize nwrote;
   GError *error = NULL;
 
+  g_assert_true (g_pollable_output_stream_is_writable (G_POLLABLE_OUTPUT_STREAM (out)));
+
   nwrote = g_output_stream_write (out, buf, 2, NULL, &error);
   g_assert_no_error (error);
   g_assert_cmpint (nwrote, ==, 2);
+  g_assert_true (g_pollable_output_stream_is_writable (G_POLLABLE_OUTPUT_STREAM (out)));
+
 /* Give the pipe a few ticks to propagate the write for sockets. On my
  * iMac i7, 40 works, 30 doesn't. */
   g_usleep (80L);