api: fromjson/tojson enum flag support

Represent enum flags as JSON arrays (as these can have multiple values).
Add unit tests.

Type: improvement
Change-Id: I680c5b6f76ef6f05f360e2f3b9c4cbb927e15d7d
Signed-off-by: Ole Troan <ot@cisco.com>

1 files changed, 130 insertions, 0 deletions

diff --git a/src/vat2/test/vat2_test.c b/src/vat2/test/vat2_test.c
new file mode 100644
index 00000000000..fe788f127c6
--- /dev/null
+++ b/src/vat2/test/vat2_test.c
@@ -0,0 +1,130 @@
+/*
+ * Copyright (c) 2020 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <stdio.h>
+#include <assert.h>
+#include <vlibapi/api.h>
+#include "vat2/test/vat2_test.api_types.h"
+#include "vat2/test/vat2_test.api_tojson.h"
+#include "vat2/test/vat2_test.api_fromjson.h"
+
+typedef cJSON *(* tojson_fn_t)(void *);
+typedef void *(* fromjson_fn_t)(cJSON *o, int *len);
+
+static void
+test (tojson_fn_t tojson, fromjson_fn_t fromjson, cJSON *o, bool should_fail)
+{
+  // convert JSON object to API
+  int len = 0;
+  void *mp = (fromjson)(o, &len);
+  assert(mp);
+
+  // convert API to JSON
+  cJSON *o2 = (tojson)(mp);
+  assert(o2);
+
+  if (should_fail)
+    assert(!cJSON_Compare(o, o2, 1));
+  else
+    assert(cJSON_Compare(o, o2, 1));
+  char *s2 = cJSON_Print(o2);
+  assert(s2);
+
+  char *in = cJSON_Print(o);
+  printf("%s\n%s\n", in, s2);
+
+  free(in);
+  free(mp);
+  cJSON_Delete(o2);
+  free(s2);
+}
+
+struct msgs {
+  char *name;
+  tojson_fn_t tojson;
+  fromjson_fn_t fromjson;
+};
+struct tests {
+  char *s;
+  bool should_fail;
+};
+
+uword *function_by_name_tojson;
+uword *function_by_name_fromjson;
+static void
+register_functions(struct msgs msgs[], int n)
+{
+  int i;
+  function_by_name_tojson = hash_create_string (0, sizeof (uword));
+  function_by_name_fromjson = hash_create_string (0, sizeof (uword));
+  for (i = 0; i < n; i++) {
+    hash_set_mem(function_by_name_tojson, msgs[i].name, msgs[i].tojson);
+    hash_set_mem(function_by_name_fromjson, msgs[i].name, msgs[i].fromjson);
+  }
+}
+
+static void
+runtest (char *s, bool should_fail)
+{
+  cJSON *o = cJSON_Parse(s);
+  assert(o);
+  char *name = cJSON_GetStringValue(cJSON_GetObjectItem(o, "_msgname"));
+  assert(name);
+
+  uword *p = hash_get_mem(function_by_name_tojson, name);
+  assert(p);
+  tojson_fn_t tojson = (tojson_fn_t)p[0];
+
+  p = hash_get_mem(function_by_name_fromjson, name);
+  assert(p);
+  fromjson_fn_t fromjson = (fromjson_fn_t)p[0];
+
+  test(tojson, fromjson, o, should_fail);
+  cJSON_Delete(o);
+}
+
+struct msgs msgs[] = {
+{
+  .name = "test_prefix",
+  .tojson = (tojson_fn_t)vl_api_test_prefix_t_tojson,
+  .fromjson = (fromjson_fn_t)vl_api_test_prefix_t_fromjson,
+},
+{
+  .name = "test_enum",
+  .tojson = (tojson_fn_t)vl_api_test_enum_t_tojson,
+  .fromjson = (fromjson_fn_t)vl_api_test_enum_t_fromjson,
+},
+};
+
+struct tests tests[] = {
+  {.s = "{\"_msgname\": \"test_prefix\", \"pref\": \"2001:db8::/64\"}"},
+  {.s = "{\"_msgname\": \"test_prefix\", \"pref\": \"192.168.10.0/24\"}"},
+  {.s = "{\"_msgname\": \"test_enum\", \"flags\": [\"RED\", \"BLUE\"]}"},
+  {.s = "{\"_msgname\": \"test_enum\", \"flags\": [\"BLACK\", \"BLUE\"]}",
+   .should_fail = 1},
+};
+
+int main (int argc, char **argv)
+{
+  clib_mem_init (0, 64 << 20);
+  int n = sizeof(msgs)/sizeof(msgs[0]);
+  register_functions(msgs, n);
+
+  int i;
+  n = sizeof(tests)/sizeof(tests[0]);
+  for (i = 0; i < n; i++) {
+    runtest(tests[i].s, tests[i].should_fail);
+  }
+}