tests: Fix various straightforward -Wsign-conversion warnings

In the gobject tests.

Signed-off-by: Philip Withnall <pwithnall@gnome.org>

Helps: #3405

gobject/tests/ifaceproperties.c

@@ -396,9 +396,9 @@ static DEFINE_TYPE (DerivedObject, derived_object,
 static void
 assert_in_properties (GParamSpec  *param_spec,
                       GParamSpec **properties,
-                      gint         n_properties)
+                      size_t       n_properties)
 {
-  gint i;
+  size_t i;
   gboolean found = FALSE;
 
   for (i = 0; i < n_properties; i++)

gobject/tests/param.c

@@ -1376,10 +1376,10 @@ static void test_implementation_class_init (TestImplementationClass *class)
 }
 
 typedef struct {
-  gint change_this_flag;
-  gint change_this_type;
-  gint use_this_flag;
-  gint use_this_type;
+  guint change_this_flag;
+  guint change_this_type;
+  guint use_this_flag;
+  guint use_this_type;
 } TestParamImplementData;
 
 static void
@@ -1433,7 +1433,7 @@ test_param_implement (void)
                   continue;
               }
 
-            test_path = g_strdup_printf ("/param/implement/subprocess/%d-%d-%d-%d",
+            test_path = g_strdup_printf ("/param/implement/subprocess/%u-%u-%u-%u",
                                          change_this_flag, change_this_type,
                                          use_this_flag, use_this_type);
             g_test_trap_subprocess (test_path, G_TIME_SPAN_SECOND,
@@ -1545,8 +1545,8 @@ param_int_init (GParamSpec *pspec)
 {
   GParamSpecInt *ispec = (GParamSpecInt *)pspec;
 
-  ispec->minimum = 0x7fffffff;
-  ispec->maximum = 0x80000000;
+  ispec->minimum = (int) 0x7fffffff;
+  ispec->maximum = (int) 0x80000000;
   ispec->default_value = 0;
 }
 
@@ -1686,7 +1686,7 @@ main (int argc, char *argv[])
       for (data.use_this_flag = 0; data.use_this_flag < 16; data.use_this_flag++)
         for (data.use_this_type = 0; data.use_this_type < 4; data.use_this_type++)
           {
-            test_path = g_strdup_printf ("/param/implement/subprocess/%d-%d-%d-%d",
+            test_path = g_strdup_printf ("/param/implement/subprocess/%u-%u-%u-%u",
                                          data.change_this_flag, data.change_this_type,
                                          data.use_this_flag, data.use_this_type);
             test_data = g_memdup2 (&data, sizeof (TestParamImplementData));

gobject/tests/properties-refcount1.c

@@ -23,7 +23,7 @@ typedef struct _GTestClass GTestClass;
 struct _GTest
 {
   GObject object;
-  gint id;
+  unsigned int id;
   gint dummy;
 
   gint count;

gobject/tests/properties-refcount3.c

@@ -19,7 +19,7 @@ typedef struct _GTestClass GTestClass;
 struct _GTest
 {
   GObject object;
-  gint id;
+  unsigned int id;
   gint dummy;
 
   gint count;

gobject/tests/signals.c

@@ -1705,7 +1705,7 @@ test_clear_signal_handler (void)
 
   if (g_test_undefined ())
     {
-      handler = g_random_int_range (0x01, 0xFF);
+      handler = (gulong) g_random_int_range (0x01, 0xFF);
       g_test_expect_message (G_LOG_DOMAIN, G_LOG_LEVEL_CRITICAL,
                              "*instance '* has no handler with id *'");
       g_clear_signal_handler (&handler, test_obj);

gobject/tests/threadtests.c

@@ -220,8 +220,8 @@ test_threaded_object_init (void)
 }
 
 typedef struct {
-    MyTester0 *strong;
-    guint unref_delay;
+  MyTester0 *strong;
+  gulong unref_delay;
 } UnrefInThreadData;
 
 static gpointer
@@ -269,7 +269,7 @@ test_threaded_weak_ref (void)
       gpointer weak;
 #endif
       MyTester0 *strengthened;
-      guint get_delay;
+      gulong get_delay;
       GThread *thread;
       GError *error = NULL;
 
@@ -290,8 +290,8 @@ test_threaded_weak_ref (void)
        * timing. Ideally, we want each side to win half the races; on
        * smcv's laptop, these timings are about right.
        */
-      data.unref_delay = g_random_int_range (SLEEP_MIN_USEC / 2, SLEEP_MAX_USEC / 2);
-      get_delay = g_random_int_range (SLEEP_MIN_USEC, SLEEP_MAX_USEC);
+      data.unref_delay = (gulong) g_random_int_range (SLEEP_MIN_USEC / 2, SLEEP_MAX_USEC / 2);
+      get_delay = (gulong) g_random_int_range (SLEEP_MIN_USEC, SLEEP_MAX_USEC);
 
       /* One half of the race is to unref the shared object */
       thread = g_thread_create (unref_in_thread, &data, TRUE, &error);

gobject/tests/type.c

@@ -3,7 +3,7 @@
 static void
 test_registration_serial (void)
 {
-  gint serial1, serial2, serial3;
+  guint serial1, serial2, serial3;
 
   serial1 = g_type_get_type_registration_serial ();
   g_pointer_type_register_static ("my+pointer");

gobject/tests/value.c

@@ -633,9 +633,9 @@ test_valuearray_basic (void)
   a = g_value_array_new (20);
 
   g_value_init (&v, G_TYPE_INT);
-  for (i = 0; i < 100; i++)
+  for (int j = 0; j < 100; j++)
     {
-      g_value_set_int (&v, i);
+      g_value_set_int (&v, j);
       g_value_array_append (a, &v);
     }
 
@@ -646,9 +646,9 @@ test_valuearray_basic (void)
   for (i = 20; i < 100; i+= 5)
     g_value_array_remove (a, 100 - i);
 
-  for (i = 100; i < 150; i++)
+  for (int j = 100; j < 150; j++)
     {
-      g_value_set_int (&v, i);
+      g_value_set_int (&v, j);
       g_value_array_prepend (a, &v);
     }
 
@@ -692,7 +692,7 @@ test_value_array_sort_with_data (void)
 
   /* Add some values and try sorting them. */
   g_value_init (&v, G_TYPE_INT);
-  for (unsigned int i = 0; i < 100; i++)
+  for (int i = 0; i < 100; i++)
     {
       g_value_set_int (&v, 100 - i);
       g_value_array_append (a, &v);