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

[Silvio Lazzeretti <silviol src gnome org>]

commit decce52952811cb944a6f637f6fbccea82fa91b2
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..ecbf46c5f 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 (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 (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);