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      1 /*
      2  * Copyright (C) 2016 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 #include "android-base/quick_exit.h"
     18 
     19 #include <gtest/gtest.h>
     20 
     21 #include <errno.h>
     22 #include <fcntl.h>
     23 #include <unistd.h>
     24 
     25 #include <string>
     26 
     27 #include "android-base/test_utils.h"
     28 
     29 // These tests are a bit sketchy, since each test run adds global state that affects subsequent
     30 // tests (including ones not in this file!). Exit with 0 in Exiter and stick the at_quick_exit test
     31 // at the end to hack around this.
     32 struct Exiter {
     33   ~Exiter() {
     34     _Exit(0);
     35   }
     36 };
     37 
     38 TEST(quick_exit, smoke) {
     39   ASSERT_EXIT(android::base::quick_exit(123), testing::ExitedWithCode(123), "");
     40 }
     41 
     42 TEST(quick_exit, skip_static_destructors) {
     43   static Exiter exiter;
     44   ASSERT_EXIT(android::base::quick_exit(123), testing::ExitedWithCode(123), "");
     45 }
     46 
     47 TEST(quick_exit, at_quick_exit) {
     48   static int counter = 4;
     49   // "Functions passed to at_quick_exit are called in reverse order of their registration."
     50   ASSERT_EQ(0, android::base::at_quick_exit([]() { _exit(counter); }));
     51   ASSERT_EQ(0, android::base::at_quick_exit([]() { counter += 2; }));
     52   ASSERT_EQ(0, android::base::at_quick_exit([]() { counter *= 10; }));
     53   ASSERT_EXIT(android::base::quick_exit(123), testing::ExitedWithCode(42), "");
     54 }
     55