[glib] Test some GError functionality explicitly

[Matthias Clasen <matthiasc src gnome org>]

commit ef4690c6c96824a2099a5feca11a1785329ec5ca
Author: Matthias Clasen <mclasen redhat com>
Date:   Sat Jul 31 02:14:28 2010 -0400

    Test some GError functionality explicitly

 glib/tests/Makefile.am |    3 ++
 glib/tests/error.c     |   73 ++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 76 insertions(+), 0 deletions(-)
---
diff --git a/glib/tests/Makefile.am b/glib/tests/Makefile.am
index 0269dc9..81a3cec 100644
--- a/glib/tests/Makefile.am
+++ b/glib/tests/Makefile.am
@@ -140,6 +140,9 @@ pattern_LDADD       = $(progs_ldadd)
 TEST_PROGS         += logging
 logging_LDADD       = $(progs_ldadd)
 
+TEST_PROGS         += error
+error_LDADD         = $(progs_ldadd)
+
 if OS_UNIX
 
 # some testing of gtester funcitonality
diff --git a/glib/tests/error.c b/glib/tests/error.c
new file mode 100644
index 0000000..ed5211a
--- /dev/null
+++ b/glib/tests/error.c
@@ -0,0 +1,73 @@
+#include <glib.h>
+
+static void
+test_overwrite (void)
+{
+  if (g_test_trap_fork (0, G_TEST_TRAP_SILENCE_STDERR))
+    {
+      GError *error;
+      error = g_error_new_literal (G_MARKUP_ERROR, G_MARKUP_ERROR_EMPTY, "bla");
+      g_set_error_literal (&error, G_MARKUP_ERROR, G_MARKUP_ERROR_PARSE, "bla");
+    }
+  g_test_trap_assert_failed ();
+  g_test_trap_assert_stderr ("*set over the top*");
+
+  if (g_test_trap_fork (0, G_TEST_TRAP_SILENCE_STDERR))
+    {
+      GError *dest;
+      GError *src;
+      dest = g_error_new_literal (G_MARKUP_ERROR, G_MARKUP_ERROR_EMPTY, "bla");
+      src = g_error_new_literal (G_MARKUP_ERROR, G_MARKUP_ERROR_PARSE, "bla");
+      g_propagate_error (&dest, src);
+    }
+  g_test_trap_assert_failed ();
+  g_test_trap_assert_stderr ("*set over the top*");
+}
+
+static void
+test_prefix (void)
+{
+  GError *error;
+  GError *dest, *src;
+
+  error = NULL;
+  g_prefix_error (&error, "foo %d %s: ", 1, "two");
+  g_assert (error == NULL);
+
+  error = g_error_new_literal (G_MARKUP_ERROR, G_MARKUP_ERROR_EMPTY, "bla");
+  g_prefix_error (&error, "foo %d %s: ", 1, "two");
+  g_assert_cmpstr (error->message, ==, "foo 1 two: bla");
+  g_error_free (error);
+
+  dest = NULL;
+  src = g_error_new_literal (G_MARKUP_ERROR, G_MARKUP_ERROR_EMPTY, "bla");
+  g_propagate_prefixed_error (&dest, src, "foo %d %s: ", 1, "two");
+  g_assert_cmpstr (dest->message, ==, "foo 1 two: bla");
+  g_error_free (dest);
+  g_error_free (src);
+}
+
+static void
+test_literal (void)
+{
+  GError *error;
+
+  error = NULL;
+  g_set_error_literal (&error, G_MARKUP_ERROR, G_MARKUP_ERROR_EMPTY, "%s %d %x");
+  g_assert_error (error, G_MARKUP_ERROR, G_MARKUP_ERROR_EMPTY);
+  g_assert_cmpstr (error->message, ==, "%s %d %x");
+  g_error_free (error);
+}
+
+int
+main (int argc, char *argv[])
+{
+  g_test_init (&argc, &argv, NULL);
+
+  g_test_add_func ("/error/overwrite", test_overwrite);
+  g_test_add_func ("/error/prefix", test_prefix);
+  g_test_add_func ("/error/literal", test_literal);
+
+  return g_test_run ();
+}
+