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diff --git a/Firestore/Example/Tests/Local/StringViewTests.mm b/Firestore/Example/Tests/Local/StringViewTests.mm
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+/*
+ * 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 "Firestore/Source/Local/StringView.h"
+
+#import <XCTest/XCTest.h>
+#include <leveldb/slice.h>
+
+using Firestore::StringView;
+
+#define ASSERT_NSSTRING_TO_STRINGVIEW_AND_BACK_OK( nsstr )                           \
+  StringView sv(nsstr);                                                              \
+  leveldb::Slice slice = sv;                                                         \
+  NSString *afterConversion = [[NSString alloc] initWithBytes:slice.data()           \
+                                                       length:slice.size()           \
+                                                     encoding:NSUTF8StringEncoding]; \
+  XCTAssertEqualObjects(afterConversion, nsstr);
+
+@interface StringViewTests : XCTestCase
+@end
+
+@implementation StringViewTests
+
+- (void)testStringViewNSStringToSliceWithUSAscii {
+  NSString *usAsciiChars = @"abcdefg ABCDEFG 12345 !@#$%";
+  ASSERT_NSSTRING_TO_STRINGVIEW_AND_BACK_OK(usAsciiChars);
+}
+
+- (void)testStringViewNSStringToSliceWithNonUSAscii {
+  NSString *nonUsAsciiChars = @"ó¹";
+  ASSERT_NSSTRING_TO_STRINGVIEW_AND_BACK_OK(nonUsAsciiChars);
+}
+
+@end