CDRIVER-471 Validation for wt opts for collection

Added in validation for wiredtiger storage options to createCollection.

Closes #127

Author: Shraya Ramani

src/mongoc/mongoc-database.c

@@ -930,8 +930,47 @@ mongoc_database_create_collection (mongoc_database_t *database,
             return NULL;
          }
       }
+
+      if (bson_iter_init_find (&iter, options, "storage")) {
+         if (!BSON_ITER_HOLDS_DOCUMENT (&iter)) {
+            bson_set_error (error,
+                            MONGOC_ERROR_COMMAND,
+                            MONGOC_ERROR_COMMAND_INVALID_ARG,
+                            "The \"storage\" parameter must be a document");
+
+            return NULL;
+         }
+
+         if (bson_iter_find (&iter, "wiredtiger")) {
+            if (!BSON_ITER_HOLDS_DOCUMENT (&iter)) {
+               bson_set_error (error,
+                               MONGOC_ERROR_COMMAND,
+                               MONGOC_ERROR_COMMAND_INVALID_ARG,
+                               "The \"wiredtiger\" option must take a document argument with a \"configString\" field");
+               return NULL;
+            }
+
+            if (bson_iter_find (&iter, "configString")) {
+               if (!BSON_ITER_HOLDS_UTF8 (&iter)) {
+                  bson_set_error (error,
+                                  MONGOC_ERROR_COMMAND,
+                                  MONGOC_ERROR_COMMAND_INVALID_ARG,
+                                  "The \"configString\" parameter must be a string");
+                  return NULL;
+               }
+            } else {
+               bson_set_error (error,
+                               MONGOC_ERROR_COMMAND,
+                               MONGOC_ERROR_COMMAND_INVALID_ARG,
+                               "The \"wiredtiger\" option must take a document argument with a \"configString\" field");
+               return NULL;
+            }
+         }
+      }
+
    }
 
+
    bson_init (&cmd);
    BSON_APPEND_UTF8 (&cmd, "create", name);
 

tests/test-mongoc-database.c

@@ -140,6 +140,9 @@ test_create_collection (void)
    mongoc_client_t *client;
    bson_error_t error = { 0 };
    bson_t options;
+   bson_t storage_opts;
+   bson_t wt_opts;
+
    char *dbname;
    char *name;
    bool r;
@@ -158,6 +161,13 @@ test_create_collection (void)
    BSON_APPEND_BOOL (&options, "capped", true);
    BSON_APPEND_BOOL (&options, "autoIndexId", true);
 
+   BSON_APPEND_DOCUMENT_BEGIN(&options, "storage", &storage_opts);
+   BSON_APPEND_DOCUMENT_BEGIN(&storage_opts, "wiredtiger", &wt_opts);
+   BSON_APPEND_UTF8(&wt_opts, "configString", "block_compressor=zlib");
+   bson_append_document_end(&storage_opts, &wt_opts);
+   bson_append_document_end(&options, &storage_opts);
+
+
    name = gen_collection_name ("create_collection");
    collection = mongoc_database_create_collection (database, name, &options, &error);
    assert (collection);