llvm/unittests/Support/ExponentialBackoffTest.cpp

   1 //===- unittests/ExponentialBackoffTest.cpp -------------------------------===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 #include "llvm/Support/ExponentialBackoff.h"
  10 #include "gtest/gtest.h"
  11 #include <chrono>
  12
  13 using namespace llvm;
  14 using namespace std::chrono_literals;
  15
  16 namespace {
  17
  18 TEST(ExponentialBackoffTest, Timeout) {
  19   auto Start = std::chrono::steady_clock::now();
  20   // Use short enough times that this test runs quickly.
  21   ExponentialBackoff Backoff(100ms, 1ms, 10ms);
  22   do {
  23   } while (Backoff.waitForNextAttempt());
  24   auto Duration = std::chrono::steady_clock::now() - Start;
  25   EXPECT_GE(Duration, 100ms);
  26 }
  27
  28 // Testing individual wait duration is omitted as those tests would be
  29 // non-deterministic.
  30
  31 } // end anonymous namespace