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diff --git a/Firestore/Example/Tests/Util/XCTestCase+Await.h b/Firestore/Example/Tests/Util/XCTestCase+Await.h
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+++ b/Firestore/Example/Tests/Util/XCTestCase+Await.h
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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 <XCTest/XCTest.h>
+
+@interface XCTestCase (Await)
+
+/**
+ * Await all outstanding expectations with a reasonable timeout, and if any of them fail, XCTFail
+ * the test.
+ */
+- (void)awaitExpectations;
+
+/**
+ * Returns a reasonable timeout for testing against Firestore.
+ */
+- (double)defaultExpectationWaitSeconds;
+
+@end