unittests/ADT/ScopeExitTest.cpp

   1 //===- llvm/unittest/ADT/ScopeExit.cpp - Scope exit unit tests --*- C++ -*-===//
   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/ADT/ScopeExit.h"
  10 #include "gtest/gtest.h"
  11
  12 using namespace llvm;
  13
  14 namespace {
  15
  16 TEST(ScopeExitTest, Basic) {
  17   struct Callable {
  18     bool &Called;
  19     Callable(bool &Called) : Called(Called) {}
  20     Callable(Callable &&RHS) : Called(RHS.Called) {}
  21     void operator()() { Called = true; }
  22   };
  23   bool Called = false;
  24   {
  25     auto g = make_scope_exit(Callable(Called));
  26     EXPECT_FALSE(Called);
  27   }
  28   EXPECT_TRUE(Called);
  29 }
  30
  31 TEST(ScopeExitTest, Release) {
  32   int Count = 0;
  33   auto Increment = [&] { ++Count; };
  34   {
  35     auto G = make_scope_exit(Increment);
  36     auto H = std::move(G);
  37     auto I = std::move(G);
  38     EXPECT_EQ(0, Count);
  39   }
  40   EXPECT_EQ(1, Count);
  41   {
  42     auto G = make_scope_exit(Increment);
  43     G.release();
  44   }
  45   EXPECT_EQ(1, Count);
  46 }
  47
  48 } // end anonymous namespace