Merge branch 'tests-without-diff' into 'master'

testsuite: Stop requiring diff

See merge request GNOME/gtk!3103

13 files changed, 116 insertions, 254 deletions

diff --git a/testsuite/css/change/meson.build b/testsuite/css/change/meson.build
index 01a6829fbd..9409f483c1 100644
--- a/testsuite/css/change/meson.build
+++ b/testsuite/css/change/meson.build
@@ -13,6 +13,7 @@ testdatadir = join_paths(installed_test_datadir, 'css')
 test_change = executable(
   'test-css-change',
   'test-css-change.c',
+  '../../testutils.c',
   c_args: common_cflags,
   dependencies: libgtk_dep,
   install: get_option('install-tests'),
diff --git a/testsuite/css/change/test-css-change.c b/testsuite/css/change/test-css-change.c
index 830f53fbfd..1d60f0bcff 100644
--- a/testsuite/css/change/test-css-change.c
+++ b/testsuite/css/change/test-css-change.c
@@ -21,6 +21,7 @@
 #include <string.h>
 #include <glib/gstdio.h>
 #include <gtk/gtk.h>
+#include "testsuite/testutils.h"
 
 #ifdef G_OS_WIN32
 # include <io.h>
@@ -50,54 +51,6 @@ test_get_other_file (const char *ui_file, const char *extension)
   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
 style_context_changed (GtkWidget *window, const char **output)
 {
diff --git a/testsuite/css/nodes/meson.build b/testsuite/css/nodes/meson.build
index 97a739f1b3..eb619cf29c 100644
--- a/testsuite/css/nodes/meson.build
+++ b/testsuite/css/nodes/meson.build
@@ -10,7 +10,7 @@ nodetest_env.set('G_ENABLE_DIAGNOSTIC', '0')
 testexecdir = join_paths(installed_test_bindir, 'css', 'nodes')
 testdatadir = join_paths(installed_test_datadir, 'css')
 
-test_nodes = executable('test-css-nodes', 'test-css-nodes.c',
+test_nodes = executable('test-css-nodes', 'test-css-nodes.c', '../../testutils.c',
                         c_args: common_cflags,
                         install: get_option('install-tests'),
                         install_dir: testexecdir,
diff --git a/testsuite/css/nodes/test-css-nodes.c b/testsuite/css/nodes/test-css-nodes.c
index 28bdfcb9b1..a44c4e4508 100644
--- a/testsuite/css/nodes/test-css-nodes.c
+++ b/testsuite/css/nodes/test-css-nodes.c
@@ -21,6 +21,7 @@
 #include <string.h>
 #include <glib/gstdio.h>
 #include <gtk/gtk.h>
+#include "testsuite/testutils.h"
 
 #ifdef G_OS_WIN32
 # include <io.h>
@@ -48,54 +49,6 @@ test_get_reference_file (const char *ui_file)
   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
 style_context_changed (GtkWidget *window, const char **output)
 {
diff --git a/testsuite/css/parser/meson.build b/testsuite/css/parser/meson.build
index 7e501aebda..f70753c2b5 100644
--- a/testsuite/css/parser/meson.build
+++ b/testsuite/css/parser/meson.build
@@ -1,7 +1,7 @@
 testexecdir = join_paths(installed_test_bindir, 'css', 'parser')
 testdatadir = join_paths(installed_test_datadir, 'css')
 
-test_parser = executable('test-css-parser', 'test-css-parser.c',
+test_parser = executable('test-css-parser', 'test-css-parser.c', '../../testutils.c',
                          c_args: common_cflags,
                          install: get_option('install-tests'),
                          install_dir: testexecdir,
diff --git a/testsuite/css/parser/test-css-parser.c b/testsuite/css/parser/test-css-parser.c
index b2c4f69746..5d18e00cb8 100644
--- a/testsuite/css/parser/test-css-parser.c
+++ b/testsuite/css/parser/test-css-parser.c
@@ -25,6 +25,7 @@
 #include <string.h>
 #include <glib/gstdio.h>
 #include <gtk/gtk.h>
+#include "testsuite/testutils.h"
 
 #ifdef G_OS_WIN32
 # include <io.h>
@@ -72,51 +73,6 @@ test_get_errors_file (const char *css_file)
   return g_string_free (file, FALSE);
 }
 
-static GBytes *
-diff_with_file (const char  *file1,
-                char        *text,
-                gssize       len,
-                GError     **error)
-{
-  GSubprocess *process;
-  GBytes *input, *output;
-
-  process = g_subprocess_new (G_SUBPROCESS_FLAGS_STDIN_PIPE
-                              | G_SUBPROCESS_FLAGS_STDOUT_PIPE,
-                              error,
-                              "diff", "-u", file1, "-", NULL);
-  if (process == NULL)
-    return NULL;
-
-  input = g_bytes_new_static (text, len >= 0 ? len : strlen (text));
-  if (!g_subprocess_communicate (process,
-                                 input,
-                                 NULL,
-                                 &output,
-                                 NULL,
-                                 error))
-    {
-      g_object_unref (process);
-      g_bytes_unref (input);
-      return NULL;
-    }
-
-  if (!g_subprocess_get_successful (process) &&
-      /* this is the condition when the files differ */
-      !(g_subprocess_get_if_exited (process) && g_subprocess_get_exit_status (process) == 1))
-    {
-      g_clear_pointer (&output, g_bytes_unref);
-      g_set_error (error, G_IO_ERROR, G_IO_ERROR_FAILED,
-                   "The `diff' process exited with error status %d",
-                   g_subprocess_get_exit_status (process));
-    }
-
-  g_object_unref (process);
-  g_bytes_unref (input);
-
-  return output;
-}
-
 static void
 append_error_value (GString *string,
                     GType    enum_type,
@@ -167,7 +123,7 @@ parse_css_file (GFile *file, gboolean generate)
   GtkCssProvider *provider;
   char *css, *css_file, *reference_file, *errors_file;
   GString *errors;
-  GBytes *diff;
+  char *diff;
   GError *error = NULL;
 
   css_file = g_file_get_path (file);
@@ -193,14 +149,13 @@ parse_css_file (GFile *file, gboolean generate)
   diff = diff_with_file (reference_file, css, -1, &error);
   g_assert_no_error (error);
 
-  if (diff && g_bytes_get_size (diff) > 0)
+  if (diff && diff[0])
     {
-      g_test_message ("Resulting CSS doesn't match reference:\n%s",
-                      (const char *) g_bytes_get_data (diff, NULL));
+      g_test_message ("Resulting CSS doesn't match reference:\n%s", diff);
       g_test_fail ();
     }
   g_free (reference_file);
-  g_clear_pointer (&diff, g_bytes_unref);
+  g_free (diff);
 
   errors_file = test_get_errors_file (css_file);
 
@@ -209,13 +164,12 @@ parse_css_file (GFile *file, gboolean generate)
       diff = diff_with_file (errors_file, errors->str, errors->len, &error);
       g_assert_no_error (error);
 
-      if (diff && g_bytes_get_size (diff) > 0)
+      if (diff && diff[0])
         {
-          g_test_message ("Errors don't match expected errors:\n%s",
-                          (const char *) g_bytes_get_data (diff, NULL));
+          g_test_message ("Errors don't match expected errors:\n%s", diff);
           g_test_fail ();
         }
-      g_clear_pointer (&diff, g_bytes_unref);
+      g_free (diff);
     }
   else if (errors->str[0])
     {
diff --git a/testsuite/css/style/meson.build b/testsuite/css/style/meson.build
index 4026c5f3be..9dc0f4c34c 100644
--- a/testsuite/css/style/meson.build
+++ b/testsuite/css/style/meson.build
@@ -19,6 +19,7 @@ cssresources = gnome.compile_resources(
 test_style = executable(
   'test-css-style',
   'test-css-style.c',
+  '../../testutils.c',
   cssresources,
   c_args: common_cflags,
   dependencies: libgtk_dep,
diff --git a/testsuite/css/style/test-css-style.c b/testsuite/css/style/test-css-style.c
index 5c40c5cdac..93367fc336 100644
--- a/testsuite/css/style/test-css-style.c
+++ b/testsuite/css/style/test-css-style.c
@@ -21,6 +21,7 @@
 #include <string.h>
 #include <glib/gstdio.h>
 #include <gtk/gtk.h>
+#include "testsuite/testutils.h"
 
 #ifdef G_OS_WIN32
 # include <io.h>
@@ -50,51 +51,6 @@ test_get_other_file (const char *ui_file, const char *extension)
   return g_string_free (file, FALSE);
 }
 
-static GBytes *
-diff_with_file (const char  *file1,
-                char        *text,
-                gssize       len,
-                GError     **error)
-{
-  GSubprocess *process;
-  GBytes *input, *output;
-
-  process = g_subprocess_new (G_SUBPROCESS_FLAGS_STDIN_PIPE
-                              | G_SUBPROCESS_FLAGS_STDOUT_PIPE,
-                              error,
-                              "diff", "-u", file1, "-", NULL);
-  if (process == NULL)
-    return NULL;
-
-  input = g_bytes_new_static (text, len >= 0 ? len : strlen (text));
-  if (!g_subprocess_communicate (process,
-                                 input,
-                                 NULL,
-                                 &output,
-                                 NULL,
-                                 error))
-    {
-      g_object_unref (process);
-      g_bytes_unref (input);
-      return NULL;
-    }
-
-  if (!g_subprocess_get_successful (process) &&
-      /* this is the condition when the files differ */
-      !(g_subprocess_get_if_exited (process) && g_subprocess_get_exit_status (process) == 1))
-    {
-      g_clear_pointer (&output, g_bytes_unref);
-      g_set_error (error, G_IO_ERROR, G_IO_ERROR_FAILED,
-                   "The `diff' process exited with error status %d",
-                   g_subprocess_get_exit_status (process));
-    }
-
-  g_object_unref (process);
-  g_bytes_unref (input);
-
-  return output;
-}
-
 static char *
 fixup_style_differences (const char *str)
 {
@@ -133,7 +89,7 @@ load_ui_file (GFile *file, gboolean generate)
   GtkBuilder *builder;
   GtkWidget *window;
   char *output;
-  GBytes *diff;
+  char *diff;
   char *ui_file, *css_file, *reference_file;
   GtkCssProvider *provider;
   GError *error = NULL;
@@ -174,13 +130,13 @@ load_ui_file (GFile *file, gboolean generate)
   diff = diff_with_file (reference_file, output, -1, &error);
   g_assert_no_error (error);
 
-  if (diff && g_bytes_get_size (diff) > 0)
+  if (diff && diff[0])
     {
-      g_test_message ("Resulting output doesn't match reference:\n%s", (const char *) g_bytes_get_data (diff, NULL));
+      g_test_message ("Resulting output doesn't match reference:\n%s", diff);
       g_test_fail ();
     }
   g_free (reference_file);
-  g_clear_pointer (&diff, g_bytes_unref);
+  g_free (diff);
 
 out:
   gtk_style_context_remove_provider_for_display (gdk_display_get_default (),
diff --git a/testsuite/gtk/meson.build b/testsuite/gtk/meson.build
index f3710546ef..382e6369e9 100644
--- a/testsuite/gtk/meson.build
+++ b/testsuite/gtk/meson.build
@@ -250,7 +250,7 @@ focus_chain_tests = [
 
 focus_chain = executable(
   'test-focus-chain',
-  sources: ['test-focus-chain.c'],
+  sources: ['test-focus-chain.c', '../testutils.c'],
   dependencies: libgtk_dep,
   c_args: common_cflags,
   install: get_option('install-tests'),
diff --git a/testsuite/gtk/test-focus-chain.c b/testsuite/gtk/test-focus-chain.c
index 033cec98b5..cffedc1add 100644
--- a/testsuite/gtk/test-focus-chain.c
+++ b/testsuite/gtk/test-focus-chain.c
@@ -21,6 +21,7 @@
 #include <string.h>
 #include <glib/gstdio.h>
 #include <gtk/gtk.h>
+#include "testsuite/testutils.h"
 
 #ifdef G_OS_WIN32
 # include <io.h>
@@ -38,54 +39,6 @@ struct {
   { GTK_DIR_RIGHT, "right" }
 };
 
-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
 check_focus_states (GtkWidget *focus_widget)
 {
diff --git a/testsuite/meson.build b/testsuite/meson.build
index 4ef7cced9a..fafe6ea140 100644
--- a/testsuite/meson.build
+++ b/testsuite/meson.build
@@ -2,10 +2,6 @@ gtk_libexecdir = join_paths(gtk_prefix, get_option('libexecdir'))
 installed_test_bindir = join_paths(gtk_libexecdir, 'installed-tests', 'gtk-4.0')
 installed_test_datadir = join_paths(gtk_datadir, 'installed-tests', 'gtk-4.0')
 
-# We call diff in various tests, so we need to check it's available,
-# otherwise we're going to have failures down the line
-diff = find_program('diff', required: true)
-
 common_env = [
   'GIO_USE_VOLUME_MONITOR=unix',
   'GSETTINGS_BACKEND=memory',
diff --git a/testsuite/testutils.c b/testsuite/testutils.c
new file mode 100644
index 0000000000..3d537e80dc
--- /dev/null
+++ b/testsuite/testutils.c
@@ -0,0 +1,88 @@
+/*
+ * Copyright © 2021 Red Hat, Inc.
+ *
+ * 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 2.1 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/>.
+ *
+ * Authors: Matthias Clasen <mclasen@redhat.com>
+ */
+
+#include <glib.h>
+#include <glib/gstdio.h>
+#include <unistd.h>
+#include "testsuite/testutils.h"
+
+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 (g_find_program_in_path ("diff"))
+    {
+      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);
+    }
+  else
+    {
+      char *buf1;
+      gsize len1;
+
+      if (!g_file_get_contents (file1, &buf1, &len1, error))
+        return NULL;
+
+      if ((len != -1 && len != len1) ||
+          strncmp (text, buf1, len1) != 0)
+        diff = g_strdup ("Files differ.\n");
+
+      g_free (buf1);
+    }
+
+  return diff;
+}
diff --git a/testsuite/testutils.h b/testsuite/testutils.h
new file mode 100644
index 0000000000..7250ca6160
--- /dev/null
+++ b/testsuite/testutils.h
@@ -0,0 +1,7 @@
+#pragma once
+
+char * diff_with_file (const char  *file1,
+                       char        *text,
+                       gssize       len,
+                       GError     **error);
+