[gtk/test-coverage: 2/8] Add some tests for GtkNoSelection

[Matthias Clasen <matthiasc src gnome org>]

commit 42042e6811107e16446df84d3102b6b75080c336
Author: Matthias Clasen <mclasen redhat com>
Date:   Thu Jul 14 23:32:00 2022 -0400

    Add some tests for GtkNoSelection

 testsuite/gtk/meson.build   |   1 +
 testsuite/gtk/noselection.c | 553 ++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 554 insertions(+)
---
diff --git a/testsuite/gtk/meson.build b/testsuite/gtk/meson.build
index 4dd9e494fe..05800c22d5 100644
--- a/testsuite/gtk/meson.build
+++ b/testsuite/gtk/meson.build
@@ -58,6 +58,7 @@ tests = [
   { 'name': 'main' },
   { 'name': 'maplistmodel' },
   { 'name': 'multiselection' },
+  { 'name': 'noselection' },
   { 'name': 'notify' },
   { 'name': 'no-gtk-init' },
   { 'name': 'object' },
diff --git a/testsuite/gtk/noselection.c b/testsuite/gtk/noselection.c
new file mode 100644
index 0000000000..59e0526035
--- /dev/null
+++ b/testsuite/gtk/noselection.c
@@ -0,0 +1,553 @@
+/*
+ * Copyright (C) 2022, Red Hat, Inc.
+ * Authors: Matthias Clasen <mclasen redhat com>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <locale.h>
+
+#include <gtk/gtk.h>
+
+static GQuark number_quark;
+static GQuark changes_quark;
+static GQuark selection_quark;
+
+static guint
+get (GListModel *model,
+     guint       position)
+{
+  guint number;
+  GObject *object = g_list_model_get_item (model, position);
+  g_assert_nonnull (object);
+  number = GPOINTER_TO_UINT (g_object_get_qdata (object, number_quark));
+  g_object_unref (object);
+  return number;
+}
+
+static char *
+model_to_string (GListModel *model)
+{
+  GString *string = g_string_new (NULL);
+  guint i;
+
+  for (i = 0; i < g_list_model_get_n_items (model); i++)
+    {
+      if (i > 0)
+        g_string_append (string, " ");
+      g_string_append_printf (string, "%u", get (model, i));
+    }
+
+  return g_string_free (string, FALSE);
+}
+
+static char *
+selection_to_string (GListModel *model)
+{
+  GString *string = g_string_new (NULL);
+  guint i;
+
+  for (i = 0; i < g_list_model_get_n_items (model); i++)
+    {
+      if (!gtk_selection_model_is_selected (GTK_SELECTION_MODEL (model), i))
+        continue;
+
+      if (string->len > 0)
+        g_string_append (string, " ");
+      g_string_append_printf (string, "%u", get (model, i));
+    }
+
+  return g_string_free (string, FALSE);
+}
+
+static GListStore *
+new_store (guint start,
+           guint end,
+           guint step);
+
+static GObject *
+make_object (guint number)
+{
+  GObject *object;
+
+  /* 0 cannot be differentiated from NULL, so don't use it */
+  g_assert_cmpint (number, !=, 0);
+
+  object = g_object_new (G_TYPE_OBJECT, NULL);
+  g_object_set_qdata (object, number_quark, GUINT_TO_POINTER (number));
+
+  return object;
+}
+
+static void
+splice (GListStore *store,
+        guint       pos,
+        guint       removed,
+        guint      *numbers,
+        guint       added)
+{
+  GObject **objects = g_newa (GObject *, added);
+  guint i;
+
+  for (i = 0; i < added; i++)
+    objects[i] = make_object (numbers[i]);
+
+  g_list_store_splice (store, pos, removed, (gpointer *) objects, added);
+
+  for (i = 0; i < added; i++)
+    g_object_unref (objects[i]);
+}
+
+static void
+add (GListStore *store,
+     guint       number)
+{
+  GObject *object = make_object (number);
+  g_list_store_append (store, object);
+  g_object_unref (object);
+}
+
+static void
+insert (GListStore *store,
+        guint position,
+        guint number)
+{
+  GObject *object = make_object (number);
+  g_list_store_insert (store, position, object);
+  g_object_unref (object);
+}
+
+#define assert_model(model, expected) G_STMT_START{ \
+  char *s = model_to_string (G_LIST_MODEL (model)); \
+  if (!g_str_equal (s, expected)) \
+     g_assertion_message_cmpstr (G_LOG_DOMAIN, __FILE__, __LINE__, G_STRFUNC, \
+         #model " == " #expected, s, "==", expected); \
+  g_free (s); \
+}G_STMT_END
+
+#define ignore_changes(model) G_STMT_START{ \
+  GString *changes = g_object_get_qdata (G_OBJECT (model), changes_quark); \
+  g_string_set_size (changes, 0); \
+}G_STMT_END
+
+#define assert_changes(model, expected) G_STMT_START{ \
+  GString *changes = g_object_get_qdata (G_OBJECT (model), changes_quark); \
+  if (!g_str_equal (changes->str, expected)) \
+     g_assertion_message_cmpstr (G_LOG_DOMAIN, __FILE__, __LINE__, G_STRFUNC, \
+         #model " == " #expected, changes->str, "==", expected); \
+  g_string_set_size (changes, 0); \
+}G_STMT_END
+
+#define assert_selection(model, expected) G_STMT_START{ \
+  char *s = selection_to_string (G_LIST_MODEL (model)); \
+  if (!g_str_equal (s, expected)) \
+     g_assertion_message_cmpstr (G_LOG_DOMAIN, __FILE__, __LINE__, G_STRFUNC, \
+         #model " == " #expected, s, "==", expected); \
+  g_free (s); \
+}G_STMT_END
+
+#define assert_selection_changes(model, expected) G_STMT_START{ \
+  GString *changes = g_object_get_qdata (G_OBJECT (model), selection_quark); \
+  if (!g_str_equal (changes->str, expected)) \
+     g_assertion_message_cmpstr (G_LOG_DOMAIN, __FILE__, __LINE__, G_STRFUNC, \
+         #model " == " #expected, changes->str, "==", expected); \
+  g_string_set_size (changes, 0); \
+}G_STMT_END
+
+#define ignore_selection_changes(model) G_STMT_START{ \
+  GString *changes = g_object_get_qdata (G_OBJECT (model), selection_quark); \
+  g_string_set_size (changes, 0); \
+}G_STMT_END
+
+static GListStore *
+new_empty_store (void)
+{
+  return g_list_store_new (G_TYPE_OBJECT);
+}
+
+static GListStore *
+new_store (guint start,
+           guint end,
+           guint step)
+{
+  GListStore *store = new_empty_store ();
+  guint i;
+
+  for (i = start; i <= end; i += step)
+    add (store, i);
+
+  return store;
+}
+
+static void
+items_changed (GListModel *model,
+               guint       position,
+               guint       removed,
+               guint       added,
+               GString    *changes)
+{
+  g_assert_true (removed != 0 || added != 0);
+
+  if (changes->len)
+    g_string_append (changes, ", ");
+
+  if (removed == 1 && added == 0)
+    {
+      g_string_append_printf (changes, "-%u", position);
+    }
+  else if (removed == 0 && added == 1)
+    {
+      g_string_append_printf (changes, "+%u", position);
+    }
+  else
+    {
+      g_string_append_printf (changes, "%u", position);
+      if (removed > 0)
+        g_string_append_printf (changes, "-%u", removed);
+      if (added > 0)
+        g_string_append_printf (changes, "+%u", added);
+    }
+}
+
+static void
+notify_n_items (GObject    *object,
+                GParamSpec *pspec,
+                GString    *changes)
+{
+  g_string_append_c (changes, '*');
+}
+
+static void
+selection_changed (GListModel *model,
+                   guint       position,
+                   guint       n_items,
+                   GString    *changes)
+{
+  if (changes->len)
+    g_string_append (changes, ", ");
+
+  g_string_append_printf (changes, "%u:%u", position, n_items);
+}
+
+static void
+free_changes (gpointer data)
+{
+  GString *changes = data;
+
+  /* all changes must have been checked via assert_changes() before */
+  g_assert_cmpstr (changes->str, ==, "");
+
+  g_string_free (changes, TRUE);
+}
+
+static GtkSelectionModel *
+new_model (GListStore *store, gboolean autoselect, gboolean can_unselect)
+{
+  GtkSelectionModel *result;
+  GString *changes;
+
+  result = GTK_SELECTION_MODEL (gtk_no_selection_new (g_object_ref (G_LIST_MODEL (store))));
+
+  changes = g_string_new ("");
+  g_object_set_qdata_full (G_OBJECT(result), changes_quark, changes, free_changes);
+  g_signal_connect (result, "items-changed", G_CALLBACK (items_changed), changes);
+  g_signal_connect (result, "notify::n-items", G_CALLBACK (notify_n_items), changes);
+
+  changes = g_string_new ("");
+  g_object_set_qdata_full (G_OBJECT(result), selection_quark, changes, free_changes);
+  g_signal_connect (result, "selection-changed", G_CALLBACK (selection_changed), changes);
+
+  return result;
+}
+
+static void
+test_create (void)
+{
+  GtkSelectionModel *selection;
+  GListStore *store;
+
+  if (glib_check_version (2, 59, 0) != NULL)
+    {
+      g_test_skip ("g_list_store_get_item() has overflow issues before GLIB 2.59.0");
+      return;
+    }
+
+  store = new_store (1, 5, 2);
+  selection = new_model (store, FALSE, FALSE);
+
+  assert_model (selection, "1 3 5");
+  assert_changes (selection, "");
+  assert_selection (selection, "");
+  assert_selection_changes (selection, "");
+
+  g_object_unref (store);
+
+  assert_model (selection, "1 3 5");
+  assert_changes (selection, "");
+  assert_selection (selection, "");
+  assert_selection_changes (selection, "");
+
+  g_object_unref (selection);
+}
+
+static void
+test_create_empty (void)
+{
+  GtkSingleSelection *selection;
+
+  selection = gtk_single_selection_new (NULL);
+  g_assert_cmpint (g_list_model_get_n_items (G_LIST_MODEL (selection)), ==, 0);
+
+  g_object_unref (selection);
+}
+
+static void
+test_changes (void)
+{
+  GtkSelectionModel *selection;
+  GListStore *store;
+
+  if (glib_check_version (2, 58, 0) != NULL)
+    {
+      g_test_skip ("g_list_store_splice() is broken before GLIB 2.58.0");
+      return;
+    }
+
+  store = new_store (1, 5, 1);
+  selection = new_model (store, FALSE, FALSE);
+  assert_model (selection, "1 2 3 4 5");
+  assert_changes (selection, "");
+  assert_selection (selection, "");
+  assert_selection_changes (selection, "");
+
+  g_list_store_remove (store, 3);
+  assert_model (selection, "1 2 3 5");
+  assert_changes (selection, "-3*");
+  assert_selection (selection, "");
+  assert_selection_changes (selection, "");
+
+  insert (store, 3, 99);
+  assert_model (selection, "1 2 3 99 5");
+  assert_changes (selection, "+3*");
+  assert_selection (selection, "");
+  assert_selection_changes (selection, "");
+
+  splice (store, 3, 2, (guint[]) { 97 }, 1);
+  assert_model (selection, "1 2 3 97");
+  assert_changes (selection, "3-2+1*");
+  assert_selection (selection, "");
+  assert_selection_changes (selection, "");
+
+  g_object_unref (selection);
+  g_object_unref (store);
+}
+
+static void
+test_selection (void)
+{
+  GtkSelectionModel *selection;
+  GListStore *store;
+  gboolean ret;
+
+  if (glib_check_version (2, 59, 0) != NULL)
+    {
+      g_test_skip ("g_list_store_get_item() has overflow issues before GLIB 2.59.0");
+      return;
+    }
+
+  store = new_store (1, 5, 1);
+  selection = new_model (store, TRUE, FALSE);
+  assert_selection (selection, "");
+  assert_selection_changes (selection, "");
+
+  ret = gtk_selection_model_select_item (selection, 3, FALSE);
+  g_assert_false (ret);
+  assert_selection (selection, "");
+  assert_selection_changes (selection, "");
+
+  ret = gtk_selection_model_unselect_item (selection, 3);
+  g_assert_false (ret);
+  assert_selection (selection, "");
+  assert_selection_changes (selection, "");
+
+  ret = gtk_selection_model_select_item (selection, 1, FALSE);
+  g_assert_false (ret);
+  assert_selection (selection, "");
+  assert_selection_changes (selection, "");
+
+  ret = gtk_selection_model_select_range (selection, 3, 2, FALSE);
+  g_assert_false (ret);
+  assert_selection (selection, "");
+  assert_selection_changes (selection, "");
+
+  ret = gtk_selection_model_unselect_range (selection, 4, 2);
+  g_assert_false (ret);
+  assert_selection (selection, "");
+  assert_selection_changes (selection, "");
+
+  ret = gtk_selection_model_select_all (selection);
+  g_assert_false (ret);
+  assert_selection (selection, "");
+  assert_selection_changes (selection, "");
+
+  ret = gtk_selection_model_unselect_all (selection);
+  g_assert_false (ret);
+  assert_selection (selection, "");
+  assert_selection_changes (selection, "");
+
+  g_object_unref (store);
+  g_object_unref (selection);
+}
+
+static void
+check_get_selection (GtkSelectionModel *selection)
+{
+  GtkBitset *set;
+  guint i, n_items;
+
+  set = gtk_selection_model_get_selection (selection);
+  
+  n_items = g_list_model_get_n_items (G_LIST_MODEL (selection));
+  if (n_items == 0)
+    {
+      g_assert_true (gtk_bitset_is_empty (set));
+    }
+  else
+    {
+      for (i = 0; i < n_items; i++)
+        {
+          g_assert_cmpint (gtk_bitset_contains (set, i), ==, gtk_selection_model_is_selected (selection, i));
+        }
+      
+      /* check that out-of-range has no bits set */
+      g_assert_cmpint (gtk_bitset_get_maximum (set), <, g_list_model_get_n_items (G_LIST_MODEL (selection)));
+    }
+
+  gtk_bitset_unref (set);
+}
+
+static void
+test_query_range (void)
+{
+  GtkSelectionModel *selection;
+  GListStore *store;
+  
+  store = new_store (1, 5, 1);
+  selection = new_model (store, TRUE, TRUE);
+  check_get_selection (selection);
+
+  gtk_selection_model_unselect_item (selection, 0);
+  check_get_selection (selection);
+
+  gtk_selection_model_select_item (selection, 2,  TRUE);
+  check_get_selection (selection);
+
+  gtk_selection_model_select_item (selection, 4, TRUE);
+  check_get_selection (selection);
+
+  ignore_selection_changes (selection);
+
+  g_object_unref (store);
+  g_object_unref (selection);
+}
+
+static void
+test_set_model (void)
+{
+  GtkSelectionModel *selection;
+  GListStore *store;
+  GListModel *m1, *m2;
+
+  store = new_store (1, 5, 1);
+  m1 = G_LIST_MODEL (store);
+  m2 = G_LIST_MODEL (gtk_slice_list_model_new (g_object_ref (m1), 0, 3));
+  selection = new_model (store, TRUE, TRUE);
+  assert_selection (selection, "");
+  assert_selection_changes (selection, "");
+
+  /* we retain the selected item across model changes */
+  gtk_no_selection_set_model (GTK_NO_SELECTION (selection), m2);
+  assert_changes (selection, "0-5+3*");
+  assert_selection (selection, "");
+  assert_selection_changes (selection, "");
+
+  gtk_no_selection_set_model (GTK_NO_SELECTION (selection), m1);
+  assert_changes (selection, "0-3+5*");
+  assert_selection (selection, "");
+  assert_selection_changes (selection, "");
+
+  gtk_no_selection_set_model (GTK_NO_SELECTION (selection), m2);
+  assert_changes (selection, "0-5+3*");
+  assert_selection (selection, "");
+  assert_selection_changes (selection, "");
+
+  /* we retain no selected item across model changes */
+  gtk_no_selection_set_model (GTK_NO_SELECTION (selection), m1);
+  assert_changes (selection, "0-3+5*");
+  assert_selection (selection, "");
+  assert_selection_changes (selection, "");
+
+  gtk_no_selection_set_model (GTK_NO_SELECTION (selection), m1);
+  assert_changes (selection, "");
+  assert_selection (selection, "");
+  assert_selection_changes (selection, "");
+
+  g_object_unref (m2);
+  g_object_unref (m1);
+  g_object_unref (selection);
+}
+
+static void
+test_empty (void)
+{
+  GtkNoSelection *selection;
+  GListStore *store;
+
+  selection = gtk_no_selection_new (NULL);
+
+  g_assert_cmpuint (g_list_model_get_n_items (G_LIST_MODEL (selection)), ==, 0);
+  g_assert_null (g_list_model_get_item (G_LIST_MODEL (selection), 11));
+  g_assert_true (g_list_model_get_item_type (G_LIST_MODEL (selection)) == G_TYPE_OBJECT);
+  g_assert_null (gtk_no_selection_get_model (GTK_NO_SELECTION (selection)));
+
+  store = g_list_store_new (G_TYPE_OBJECT);
+  gtk_no_selection_set_model (selection, G_LIST_MODEL (store));
+  g_object_unref (store);
+
+  g_assert_cmpuint (g_list_model_get_n_items (G_LIST_MODEL (selection)), ==, 0);
+  g_assert_null (g_list_model_get_item (G_LIST_MODEL (selection), 11));
+
+  g_object_unref (selection);
+}
+
+int
+main (int argc, char *argv[])
+{
+  (g_test_init) (&argc, &argv, NULL);
+  setlocale (LC_ALL, "C");
+
+  number_quark = g_quark_from_static_string ("Hell and fire was spawned to be released.");
+  changes_quark = g_quark_from_static_string ("What did I see? Can I believe what I saw?");
+  selection_quark = g_quark_from_static_string ("Mana mana, badibidibi");
+
+  g_test_add_func ("/noselection/create", test_create);
+  g_test_add_func ("/noselection/create-empty", test_create_empty);
+  g_test_add_func ("/noselection/selection", test_selection);
+  g_test_add_func ("/noselection/query-range", test_query_range);
+  g_test_add_func ("/noselection/changes", test_changes);
+  g_test_add_func ("/noselection/set-model", test_set_model);
+  g_test_add_func ("/noselection/empty", test_empty);
+
+  return g_test_run ();
+}