Add a test framework for CSS styles

This uses the same function for dumping CSS nodes and styles
as the CSS node test. It can be used to test aspects of inheritance
and matching, as well as initial values.

No actual tests yet.

configure.ac

@@ -1895,6 +1895,7 @@ testsuite/a11y/state/Makefile
 testsuite/css/Makefile
 testsuite/css/parser/Makefile
 testsuite/css/nodes/Makefile
+testsuite/css/style/Makefile
 testsuite/gdk/Makefile
 testsuite/gtk/Makefile
 testsuite/reftests/Makefile

testsuite/css/Makefile.am

@@ -2,7 +2,7 @@ include $(top_srcdir)/Makefile.decl
 
 NULL =
 
-SUBDIRS = parser nodes
+SUBDIRS = parser nodes style
 
 check_PROGRAMS = $(TEST_PROGS)
 test_in_files =

testsuite/css/style/Makefile.am

@@ -0,0 +1,55 @@
+include $(top_srcdir)/Makefile.decl
+
+NULL =
+
+CLEANFILES =
+
+TEST_PROGS += test-css-style
+test_in_files = test-css-style.test.in
+
+check_PROGRAMS = $(TEST_PROGS)
+
+test_css_style_CFLAGS = \
+        -I$(top_srcdir)                 \
+        -I$(top_builddir)/gdk           \
+        -I$(top_srcdir)/gdk             \
+        $(GTK_DEBUG_FLAGS)              \
+        $(GTK_DEP_CFLAGS)
+
+test_css_style_LDADD = \
+        $(top_builddir)/gdk/libgdk-3.la \
+        $(top_builddir)/gtk/libgtk-3.la \
+        $(GTK_DEP_LIBS)
+
+test_css_style_SOURCES = \
+        test-css-style.c
+
+test_data = \
+	$(NULL)
+
+EXTRA_DIST += $(test_in_files) $(test_data)
+
+if BUILDOPT_INSTALL_TESTS
+insttestdir=$(libexecdir)/installed-tests/$(PACKAGE)/css/style
+insttest_PROGRAMS = $(TEST_PROGS)
+insttest_DATA = $(test_data)
+
+substitutions = \
+        -e s,@libexecdir\@,$(libexecdir),g \
+        $(NULL)
+
+test_files = $(test_in_files:.test.in=.test)
+
+$(test_files): %.test: %.test.in
+        $(AM_V_GEN) sed $(substitutions) $< > $@.tmp && mv $@.tmp $@
+
+EXTRA_DIST += $(test_files)
+
+CLEANFILES += $(test_files)
+
+testmetadir = $(datadir)/installed-tests/$(PACKAGE)/css/style
+testmeta_DATA = $(test_files)
+endif
+
+
+-include $(top_srcdir)/git.mk

testsuite/css/style/test-css-style.c

@@ -0,0 +1,287 @@
+/*
+ * Copyright (C) 2015 Red Hat Inc.
+ *
+ * Author:
+ *      Matthias Clasen <mclasen@redhat.com>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library 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
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <string.h>
+#include <glib/gstdio.h>
+#include <gtk/gtk.h>
+
+/* There shall be no other styles */
+#define GTK_STYLE_PROVIDER_PRIORITY_FORCE G_MAXUINT
+
+char *
+test_get_other_file (const char *ui_file, const char *extension)
+{
+  GString *file = g_string_new (NULL);
+
+  if (g_str_has_suffix (ui_file, ".ui"))
+    g_string_append_len (file, ui_file, strlen (ui_file) - strlen (".ui"));
+  else
+    g_string_append (file, ui_file);
+
+  g_string_append (file, extension);
+
+  if (!g_file_test (file->str, G_FILE_TEST_EXISTS))
+    {
+      g_string_free (file, TRUE);
+      return NULL;
+    }
+
+  return g_string_free (file, FALSE);
+}
+
+static char *
+diff_with_file (const char  *file1,
+                char        *text,
+                gssize       len,
+                GError     **error)
+{
+  const char *command[] = { "diff", "-u", file1, NULL, NULL };
+  char *diff, *tmpfile;
+  int fd;
+
+  diff = NULL;
+
+  if (len < 0)
+    len = strlen (text);
+  
+  /* write the text buffer to a temporary file */
+  fd = g_file_open_tmp (NULL, &tmpfile, error);
+  if (fd < 0)
+    return NULL;
+
+  if (write (fd, text, len) != (int) len)
+    {
+      close (fd);
+      g_set_error (error,
+                   G_FILE_ERROR, G_FILE_ERROR_FAILED,
+                   "Could not write data to temporary file '%s'", tmpfile);
+      goto done;
+    }
+  close (fd);
+  command[3] = tmpfile;
+
+  /* run diff command */
+  g_spawn_sync (NULL, 
+                (char **) command,
+                NULL,
+                G_SPAWN_SEARCH_PATH,
+                NULL, NULL,
+	        &diff,
+                NULL, NULL,
+                error);
+
+done:
+  g_unlink (tmpfile);
+  g_free (tmpfile);
+
+  return diff;
+}
+
+static void
+load_ui_file (GFile *file, gboolean generate)
+{
+  GtkBuilder *builder;
+  GtkWidget *window;
+  GtkStyleContext *context;
+  char *output, *diff;
+  char *ui_file, *css_file, *reference_file;
+  GtkCssProvider *provider;
+  GError *error = NULL;
+
+  ui_file = g_file_get_path (file);
+
+  css_file = test_get_other_file (ui_file, ".css");
+  g_assert (css_file != NULL);
+
+  provider = gtk_css_provider_new ();
+  gtk_css_provider_load_from_path (provider, css_file, &error);
+  g_assert_no_error (error);
+  gtk_style_context_add_provider_for_screen (gdk_screen_get_default (),
+                                             GTK_STYLE_PROVIDER (provider),
+                                             GTK_STYLE_PROVIDER_PRIORITY_FORCE);
+
+  builder = gtk_builder_new_from_file (ui_file);
+  window = GTK_WIDGET (gtk_builder_get_object (builder, "window1"));
+
+  g_assert (window != NULL);
+
+  context = gtk_widget_get_style_context (window);
+
+  output = gtk_style_context_to_string (context, GTK_STYLE_CONTEXT_PRINT_RECURSE |
+                                                 GTK_STYLE_CONTEXT_PRINT_SHOW_STYLE);
+
+  if (generate)
+    {
+      g_print ("%s", output);
+      goto out;
+    }
+
+  reference_file = test_get_other_file (ui_file, ".nodes");
+
+  diff = diff_with_file (reference_file, output, -1, &error);
+  g_assert_no_error (error);
+
+  if (diff && diff[0])
+    {
+      g_test_message ("Resulting output doesn't match reference:\n%s", diff);
+      g_test_fail ();
+    }
+  g_free (reference_file);
+  g_free (diff);
+
+out:
+  gtk_style_context_remove_provider_for_screen (gdk_screen_get_default (),
+                                                GTK_STYLE_PROVIDER (provider));
+  g_object_unref (provider);
+
+  g_free (output);
+  g_free (ui_file);
+  g_free (css_file);
+}
+
+static void
+test_ui_file (GFile *file)
+{
+  load_ui_file (file, FALSE);
+}
+
+static void
+add_test_for_file (GFile *file)
+{
+  char *path;
+
+  path = g_file_get_path (file);
+
+  g_test_add_vtable (path,
+                     0,
+                     g_object_ref (file),
+                     NULL,
+                     (GTestFixtureFunc) test_ui_file,
+                     (GTestFixtureFunc) g_object_unref);
+
+  g_free (path);
+}
+
+static int
+compare_files (gconstpointer a, gconstpointer b)
+{
+  GFile *file1 = G_FILE (a);
+  GFile *file2 = G_FILE (b);
+  char *path1, *path2;
+  int result;
+
+  path1 = g_file_get_path (file1);
+  path2 = g_file_get_path (file2);
+
+  result = strcmp (path1, path2);
+
+  g_free (path1);
+  g_free (path2);
+
+  return result;
+}
+
+static void
+add_tests_for_files_in_directory (GFile *dir)
+{
+  GFileEnumerator *enumerator;
+  GFileInfo *info;
+  GList *files;
+  GError *error = NULL;
+
+  enumerator = g_file_enumerate_children (dir, G_FILE_ATTRIBUTE_STANDARD_NAME, 0, NULL, &error);
+  g_assert_no_error (error);
+  files = NULL;
+
+  while ((info = g_file_enumerator_next_file (enumerator, NULL, &error)))
+    {
+      const char *filename;
+
+      filename = g_file_info_get_name (info);
+
+      if (!g_str_has_suffix (filename, ".ui") ||
+          g_str_has_suffix (filename, ".nodes"))
+        {
+          g_object_unref (info);
+          continue;
+        }
+
+      files = g_list_prepend (files, g_file_get_child (dir, filename));
+
+      g_object_unref (info);
+    }
+
+  g_assert_no_error (error);
+  g_object_unref (enumerator);
+
+  files = g_list_sort (files, compare_files);
+  g_list_foreach (files, (GFunc) add_test_for_file, NULL);
+  g_list_free_full (files, g_object_unref);
+}
+
+int
+main (int argc, char **argv)
+{
+  g_setenv ("GTK_CSS_DEBUG", "1", TRUE);
+
+  gtk_test_init (&argc, &argv);
+
+  g_object_set (gtk_settings_get_default (),
+                "gtk-font-name", "Sans",
+                NULL);
+  if (argc < 2)
+    {
+      const char *basedir;
+      GFile *dir;
+
+      basedir = g_test_get_dir (G_TEST_DIST);
+      dir = g_file_new_for_path (basedir);
+      add_tests_for_files_in_directory (dir);
+
+      g_object_unref (dir);
+    }
+  else if (strcmp (argv[1], "--generate") == 0)
+    {
+      if (argc >= 3)
+        {
+          GFile *file = g_file_new_for_commandline_arg (argv[2]);
+
+          load_ui_file (file, TRUE);
+
+          g_object_unref (file);
+        }
+    }
+  else
+    {
+      guint i;
+
+      for (i = 1; i < argc; i++)
+        {
+          GFile *file = g_file_new_for_commandline_arg (argv[i]);
+
+          add_test_for_file (file);
+
+          g_object_unref (file);
+        }
+    }
+
+  return g_test_run ();
+}
+

testsuite/css/style/test-css-style.test.in

@@ -0,0 +1,3 @@
+[Test]
+Exec=/bin/sh -c "cd @libexecdir@/installed-tests/gtk+/css/style && @libexecdir@/installed-tests/gtk+/css/style/test-css-style
+Type=session