add helper logic for JSON2JSON conversion

1 files changed, 149 insertions, 0 deletions

diff --git a/src/util/test_conversion.c b/src/util/test_conversion.c
new file mode 100644
index 000000000..00cb35e72
--- /dev/null
+++ b/src/util/test_conversion.c
@@ -0,0 +1,149 @@
+/*
+  This file is part of TALER
+  (C) 2023 Taler Systems SA
+
+  TALER is free software; you can redistribute it and/or modify it under the
+  terms of the GNU General Public License as published by the Free Software
+  Foundation; either version 3, or (at your option) any later version.
+
+  TALER 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 General Public License for more details.
+
+  You should have received a copy of the GNU General Public License along with
+  TALER; see the file COPYING.  If not, see <http://www.gnu.org/licenses/>
+*/
+/**
+ * @file util/test_conversion.c
+ * @brief Tests for conversion logic
+ * @author Christian Grothoff
+ */
+#include "platform.h"
+#include "taler_util.h"
+#include <gnunet/gnunet_json_lib.h>
+
+/**
+ * Return value from main().
+ */
+static int global_ret;
+
+/**
+ * Handle to our helper.
+ */
+static struct TALER_JSON_ExternalConversion *ec;
+
+
+/**
+ * Type of a callback that receives a JSON @a result.
+ *
+ * @param cls closure
+ * @param status_type how did the process die
+ * @apram code termination status code from the process
+ * @param result some JSON result, NULL if we failed to get an JSON output
+ */
+static void
+conv_cb (void *cls,
+         enum GNUNET_OS_ProcessStatusType status_type,
+         unsigned long code,
+         const json_t *result)
+{
+  json_t *expect;
+
+  (void) cls;
+  (void) status_type;
+  ec = NULL;
+  global_ret = 3;
+  if (42 != code)
+  {
+    GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+                "Unexpected return value from helper: %u\n",
+                (unsigned int) code);
+    return;
+  }
+  expect = GNUNET_JSON_PACK (
+    GNUNET_JSON_pack_string ("foo",
+                             "arg")
+    );
+  if (1 == json_equal (expect,
+                       result))
+  {
+    global_ret = 0;
+  }
+  else
+  {
+    GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+                "Unexpected JSON result\n");
+    json_dumpf (result,
+                stderr,
+                JSON_INDENT (2));
+    global_ret = 4;
+  }
+  json_decref (expect);
+}
+
+
+/**
+ * Function called on shutdown/CTRL-C.
+ *
+ * @param cls NULL
+ */
+static void
+do_shutdown (void *cls)
+{
+  (void) cls;
+  if (NULL != ec)
+  {
+    GNUNET_break (0);
+    global_ret = 2;
+    TALER_JSON_external_conversion_stop (ec);
+    ec = NULL;
+  }
+}
+
+
+/**
+ * Main test function.
+ *
+ * @param cls NULL
+ */
+static void
+run (void *cls)
+{
+  json_t *input;
+
+  (void) cls;
+  GNUNET_SCHEDULER_add_shutdown (&do_shutdown,
+                                 NULL);
+  input = GNUNET_JSON_PACK (
+    GNUNET_JSON_pack_string ("key",
+                             "foo")
+    );
+  ec = TALER_JSON_external_conversion_start (input,
+                                             &conv_cb,
+                                             NULL,
+                                             "./test_conversion.sh",
+                                             "test_conversion.sh",
+                                             "arg",
+                                             NULL);
+  json_decref (input);
+  GNUNET_assert (NULL != ec);
+}
+
+
+int
+main (int argc,
+      const char *const argv[])
+{
+  (void) argc;
+  (void) argv;
+  unsetenv ("XDG_DATA_HOME");
+  unsetenv ("XDG_CONFIG_HOME");
+  GNUNET_log_setup ("test-conversion",
+                    "WARNING",
+                    NULL);
+  GNUNET_OS_init (TALER_project_data_default ());
+  global_ret = 1;
+  GNUNET_SCHEDULER_run (&run,
+                        NULL);
+  return global_ret;
+}