1 files changed, 35 insertions, 0 deletions
diff --git a/Firestore/Example/Tests/Util/FSTUtilTests.m b/Firestore/Example/Tests/Util/FSTUtilTests.m
new file mode 100644
index 0000000..998832d
--- /dev/null
+++ b/Firestore/Example/Tests/Util/FSTUtilTests.m
@@ -0,0 +1,35 @@
+/*
+ * 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.
+ */
+
+#import "Util/FSTUtil.h"
+
+#import <XCTest/XCTest.h>
+
+@interface FSTUtilTests : XCTestCase
+@end
+
+@implementation FSTUtilTests
+
+- (void)testAutoID {
+  NSString *autoID = [FSTUtil autoID];
+  XCTAssertEqual([autoID length], 20);
+  for (NSUInteger i = 0; i < 20; i++) {
+    unichar c = [autoID characterAtIndex:i];
+    XCTAssert(c >= ' ' && c <= '~', @"Should be printable ascii characters.");
+  }
+}
+
+@end