test1918: verify curl_easy_option_by_name() and curl_easy_option_by_id()

... and as a practical side-effect, make sure that the
Curl_easyopts_check() function is asserted in debug builds, which we
want to detect mismatches between the options list in easyoptions.c and
the options in curl.h

Found-by: Gisle Vanem
Bug: https://github.com/curl/curl/commit/08e8455dddc5e48e58a12ade3815c01ae3da3b64#commitcomment-45991815

Closes #6461

1 files changed, 55 insertions, 0 deletions

diff --git a/tests/libtest/lib1918.c b/tests/libtest/lib1918.c
new file mode 100644
index 000000000..189c3710d
--- /dev/null
+++ b/tests/libtest/lib1918.c
@@ -0,0 +1,55 @@
+/***************************************************************************
+ *                                  _   _ ____  _
+ *  Project                     ___| | | |  _ \| |
+ *                             / __| | | | |_) | |
+ *                            | (__| |_| |  _ <| |___
+ *                             \___|\___/|_| \_\_____|
+ *
+ * Copyright (C) 1998 - 2021, Daniel Stenberg, <daniel@haxx.se>, et al.
+ *
+ * This software is licensed as described in the file COPYING, which
+ * you should have received as part of this distribution. The terms
+ * are also available at https://curl.se/docs/copyright.html.
+ *
+ * You may opt to use, copy, modify, merge, publish, distribute and/or sell
+ * copies of the Software, and permit persons to whom the Software is
+ * furnished to do so, under the terms of the COPYING file.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ***************************************************************************/
+#include "test.h"
+
+#include "testutil.h"
+#include "warnless.h"
+#include "memdebug.h"
+
+int test(char *URL)
+{
+  const struct curl_easyoption *o;
+  int error = 0;
+  (void)URL;
+
+  curl_global_init(CURL_GLOBAL_ALL);
+
+  for(o = curl_easy_option_next(NULL);
+      o;
+      o = curl_easy_option_next(o)) {
+    const struct curl_easyoption *ename =
+      curl_easy_option_by_name(o->name);
+    const struct curl_easyoption *eid =
+      curl_easy_option_by_id(o->id);
+
+    if(ename->id != o->id) {
+      printf("name lookup id %d doesn't match %d\n",
+             ename->id, o->id);
+    }
+    else if(eid->id != o->id) {
+      printf("ID lookup %d doesn't match %d\n",
+             ename->id, o->id);
+    }
+  }
+  curl_global_cleanup();
+  return error;
+}