1 files changed, 36 insertions, 0 deletions
diff --git a/Firestore/core/test/firebase/firestore/util/autoid_test.cc b/Firestore/core/test/firebase/firestore/util/autoid_test.cc
new file mode 100644
index 0000000..730c683
--- /dev/null
+++ b/Firestore/core/test/firebase/firestore/util/autoid_test.cc
@@ -0,0 +1,36 @@
+/*
+ * Copyright 2017 Google
+ *
+ * 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 "Firestore/core/src/firebase/firestore/util/autoid.h"
+
+#include <ctype.h>
+
+#include "gtest/gtest.h"
+
+using firebase::firestore::util::CreateAutoId;
+
+TEST(AutoId, IsSane) {
+  for (int i = 0; i < 50; i++) {
+    std::string auto_id = CreateAutoId();
+    EXPECT_EQ(20, auto_id.length());
+    for (int pos = 0; pos < 20; pos++) {
+      char c = auto_id[pos];
+      EXPECT_TRUE(isalpha(c) || isdigit(c))
+          << "Should be printable ascii character: '" << c << "' in \""
+          << auto_id << "\"";
+    }
+  }
+}