[glib: 1/2] tests: Don't compare strings by pointer

[Philip Withnall <pwithnall src gnome org>]

commit 662059d18a0e78c48e17f2c1730a56ebbc483bc3
Author: Timm Bäder <tbaeder redhat com>
Date:   Wed Mar 4 14:46:43 2020 +0100

    tests: Don't compare strings by pointer
    
    clang complains about this in the form of
    
    <source>:6:9: warning: result of comparison against a string literal is
      unspecified (use an explicit string comparison function instead)
    
      if (f == (void *)"a") {
            ^  ~~~~~~~~~~~
    
    Use variables for the strings instead, which should have the same
    address.

 glib/tests/list.c  | 19 +++++++++++--------
 glib/tests/slist.c | 35 ++++++++++++++++++++---------------
 2 files changed, 31 insertions(+), 23 deletions(-)
---
diff --git a/glib/tests/list.c b/glib/tests/list.c
index 0adb1bbb1..5620c244d 100644
--- a/glib/tests/list.c
+++ b/glib/tests/list.c
@@ -471,23 +471,26 @@ test_delete_link (void)
 static void
 test_prepend (void)
 {
+  gpointer a = "a";
+  gpointer b = "b";
+  gpointer c = "c";
   GList *l, *l2;
 
   l = NULL;
-  l = g_list_prepend (l, "c");
-  l = g_list_prepend (l, "a");
+  l = g_list_prepend (l, c);
+  l = g_list_prepend (l, a);
 
-  g_assert (l->data == (gpointer)"a");
-  g_assert (l->next->data == (gpointer)"c");
+  g_assert (l->data == a);
+  g_assert (l->next->data == c);
   g_assert (l->next->next == NULL);
 
   l2 = l->next;
-  l2 = g_list_prepend (l2, "b");
+  l2 = g_list_prepend (l2, b);
   g_assert (l2->prev == l);
 
-  g_assert (l->data == (gpointer)"a");
-  g_assert (l->next->data == (gpointer)"b");
-  g_assert (l->next->next->data == (gpointer)"c");
+  g_assert (l->data == a);
+  g_assert (l->next->data == b);
+  g_assert (l->next->next->data == c);
   g_assert (l->next->next->next == NULL);
 
   g_list_free (l);
diff --git a/glib/tests/slist.c b/glib/tests/slist.c
index 1f817432c..7c17573d5 100644
--- a/glib/tests/slist.c
+++ b/glib/tests/slist.c
@@ -249,6 +249,9 @@ test_slist_remove_all (void)
 static void
 test_slist_insert (void)
 {
+  gpointer a = "a";
+  gpointer b = "b";
+  gpointer c = "c";
   GSList *slist = NULL;
   GSList *st;
   gint   nums[10] = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 };
@@ -274,23 +277,23 @@ test_slist_insert (void)
 
   g_slist_free (slist);
 
-  slist = g_slist_insert (NULL, "a", 1);
-  g_assert (slist->data == (gpointer)"a");
+  slist = g_slist_insert (NULL, a, 1);
+  g_assert (slist->data == a);
   g_assert (slist->next == NULL);
   g_slist_free (slist);
 
-  slist = g_slist_append (NULL, "a");
-  slist = g_slist_append (slist, "b");
-  slist = g_slist_insert (slist, "c", 5);
+  slist = g_slist_append (NULL, a);
+  slist = g_slist_append (slist, b);
+  slist = g_slist_insert (slist, c, 5);
 
-  g_assert (slist->next->next->data == (gpointer)"c");
+  g_assert (slist->next->next->data == c);
   g_assert (slist->next->next->next == NULL);
   g_slist_free (slist);
 
-  slist = g_slist_append (NULL, "a");
-  slist = g_slist_insert_before (slist, slist, "b");
-  g_assert (slist->data == (gpointer)"b");
-  g_assert (slist->next->data == (gpointer)"a");
+  slist = g_slist_append (NULL, a);
+  slist = g_slist_insert_before (slist, slist, b);
+  g_assert (slist->data == b);
+  g_assert (slist->next->data == a);
   g_assert (slist->next->next == NULL);
   g_slist_free (slist);
 }
@@ -334,17 +337,19 @@ test_slist_position (void)
 static void
 test_slist_concat (void)
 {
+  gpointer a = "a";
+  gpointer b = "b";
   GSList *s1, *s2, *s;
 
-  s1 = g_slist_append (NULL, "a");
-  s2 = g_slist_append (NULL, "b");
+  s1 = g_slist_append (NULL, a);
+  s2 = g_slist_append (NULL, b);
   s = g_slist_concat (s1, s2);
-  g_assert (s->data == (gpointer)"a");
-  g_assert (s->next->data == (gpointer)"b");
+  g_assert (s->data == a);
+  g_assert (s->next->data == b);
   g_assert (s->next->next == NULL);
   g_slist_free (s);
 
-  s1 = g_slist_append (NULL, "a");
+  s1 = g_slist_append (NULL, a);
 
   s = g_slist_concat (NULL, s1);
   g_assert_cmpint (g_slist_length (s), ==, 1);