[gnome-photos/gnome-3-34] glib: Add photos_glib_assert_strv_contains

[Debarshi Ray <debarshir src gnome org>]

commit 3a3f9e292486bd5183f8b3b75def7f6a98560574
Author: Debarshi Ray <debarshir gnome org>
Date:   Tue Mar 31 21:22:50 2020 +0200

    glib: Add photos_glib_assert_strv_contains
    
    It's a debugging macro to assert that a GStrv contains a given string.
    
    A subsequent commit will use this to support having multiple reference
    SHA256 checksums in the test suite. Hence, photos-glib.[ch] needs to be
    moved to the private shared library.
    
    https://gitlab.gnome.org/GNOME/gnome-photos/-/merge_requests/126

 src/meson.build   |  2 +-
 src/photos-glib.c | 42 +++++++++++++++++++++++++++++++++++++++++-
 src/photos-glib.h | 27 ++++++++++++++++++++++++++-
 3 files changed, 68 insertions(+), 3 deletions(-)
---
diff --git a/src/meson.build b/src/meson.build
index a4f25576..1b29d045 100644
--- a/src/meson.build
+++ b/src/meson.build
@@ -4,6 +4,7 @@ sources = files(
   'photos-debug.c',
   'photos-error.c',
   'photos-gegl.c',
+  'photos-glib.c',
   'photos-jpeg-count.c',
   'photos-operation-insta-curve.c',
   'photos-operation-insta-filter.c',
@@ -136,7 +137,6 @@ sources = common_sources + files(
   'photos-filterable.c',
   'photos-flickr-item.c',
   'photos-gesture-zoom.c',
-  'photos-glib.c',
   'photos-google-item.c',
   'photos-image-view.c',
   'photos-image-view-helper.c',
diff --git a/src/photos-glib.c b/src/photos-glib.c
index 1da2dc6d..6191d19b 100644
--- a/src/photos-glib.c
+++ b/src/photos-glib.c
@@ -1,6 +1,6 @@
 /*
  * Photos - access, organize and share your photos on GNOME
- * Copyright © 2015 – 2019 Red Hat, Inc.
+ * Copyright © 2015 – 2020 Red Hat, Inc.
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -71,6 +71,46 @@ photos_glib_app_info_launch_uri (GAppInfo *appinfo,
 }
 
 
+void
+photos_glib_assertion_message_strv_contains (const gchar *domain,
+                                             const gchar *file,
+                                             gint line,
+                                             const gchar *function,
+                                             const gchar *expression,
+                                             const gchar *const *strv,
+                                             const gchar *str)
+{
+  g_auto (GStrv) strv_escaped = NULL;
+  g_autofree gchar *message = NULL;
+  g_autofree gchar *str_escaped = NULL;
+  g_autofree gchar *str_quoted = NULL;
+  g_autofree gchar *strv_joined = NULL;
+  g_autofree gchar *strv_joined_tmp = NULL;
+  guint i;
+  guint length;
+
+  length = g_strv_length ((GStrv) strv);
+  strv_escaped = (GStrv) g_malloc0_n (length + 1, sizeof (gchar *));
+  for (i = 0; strv[i] != NULL; i++)
+    strv_escaped[i] = g_strescape (strv[i], NULL);
+
+  strv_joined_tmp = g_strjoinv ("\", \"", strv_escaped);
+  strv_joined = g_strconcat ("[\"", strv_joined_tmp, "\"]", NULL);
+
+  if (str != NULL)
+    str_escaped = g_strescape (str, NULL);
+
+  if (str_escaped == NULL)
+    str_quoted = g_strdup ("NULL");
+  else
+    str_quoted = g_strconcat ("\"", str_escaped, "\"", NULL);
+
+  message = g_strdup_printf ("assertion failed (%s): (%s contains %s)", expression, strv_joined, str_quoted);
+
+  g_assertion_message (domain, file, line, function, message);
+}
+
+
 static void
 photos_glib_file_copy_data_free (PhotosGLibFileCopyData *data)
 {
diff --git a/src/photos-glib.h b/src/photos-glib.h
index e9c632e9..985a976e 100644
--- a/src/photos-glib.h
+++ b/src/photos-glib.h
@@ -1,6 +1,6 @@
 /*
  * Photos - access, organize and share your photos on GNOME
- * Copyright © 2015 – 2019 Red Hat, Inc.
+ * Copyright © 2015 – 2020 Red Hat, Inc.
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -27,11 +27,36 @@
 
 G_BEGIN_DECLS
 
+#define photos_glib_assert_strv_contains(strv, str) \
+  G_STMT_START { \
+    const gchar *const *__strv = (strv); \
+    const gchar *__str = (str); \
+    if (g_strv_contains (__strv, __str)); else \
+      { \
+        const gchar *expression = #strv " contains " #str; \
+        photos_glib_assertion_message_strv_contains (G_LOG_DOMAIN, \
+                                                     __FILE__, \
+                                                     __LINE__, \
+                                                     G_STRFUNC, \
+                                                     expression, \
+                                                     strv, \
+                                                     str); \
+      } \
+  } G_STMT_END
+
 gboolean              photos_glib_app_info_launch_uri            (GAppInfo *appinfo,
                                                                   const gchar *uri,
                                                                   GAppLaunchContext *launch_context,
                                                                   GError **error);
 
+void                  photos_glib_assertion_message_strv_contains (const gchar *domain,
+                                                                   const gchar *file,
+                                                                   gint line,
+                                                                   const gchar *function,
+                                                                   const gchar *expression,
+                                                                   const gchar *const *strv,
+                                                                   const gchar *str);
+
 void                  photos_glib_file_copy_async                (GFile *source,
                                                                   GFile *destination,
                                                                   GFileCopyFlags flags,