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      1 // Copyright 2014 The Android Open Source Project
      2 //
      3 // This software is licensed under the terms of the GNU General Public
      4 // License version 2, as published by the Free Software Foundation, and
      5 // may be copied, distributed, and modified under those terms.
      6 //
      7 // This program is distributed in the hope that it will be useful,
      8 // but WITHOUT ANY WARRANTY; without even the implied warranty of
      9 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     10 // GNU General Public License for more details.
     11 
     12 #include "android/base/files/ScopedHandle.h"
     13 
     14 #include <gtest/gtest.h>
     15 
     16 namespace android {
     17 namespace base {
     18 
     19 namespace {
     20 
     21 // The path of a file that can always be opened for reading on any platform.
     22 static const char kNullFile[] = "NUL";
     23 
     24 HANDLE OpenNull() {
     25     return ::CreateFile(kNullFile,
     26                         GENERIC_READ,
     27                         FILE_SHARE_READ|FILE_SHARE_WRITE,
     28                         NULL,
     29                         OPEN_EXISTING,
     30                         FILE_ATTRIBUTE_NORMAL,
     31                         NULL);
     32 }
     33 
     34 }  // namespace
     35 
     36 TEST(ScopedHandle, DefaultConstructor) {
     37     ScopedHandle h;
     38     EXPECT_FALSE(h.valid());
     39     EXPECT_EQ(INVALID_HANDLE_VALUE, h.get());
     40 }
     41 
     42 TEST(ScopedHandle, Constructor) {
     43     ScopedHandle h(OpenNull());
     44     EXPECT_TRUE(h.valid());
     45 }
     46 
     47 TEST(ScopedHandle, Release) {
     48     ScopedHandle h(OpenNull());
     49     EXPECT_TRUE(h.valid());
     50     HANDLE handle = h.release();
     51     EXPECT_FALSE(h.valid());
     52     EXPECT_NE(INVALID_HANDLE_VALUE, handle);
     53     ::CloseHandle(handle);
     54 }
     55 
     56 TEST(ScopedHandle, Close) {
     57     ScopedHandle h(OpenNull());
     58     EXPECT_TRUE(h.valid());
     59     h.close();
     60     EXPECT_FALSE(h.valid());
     61 }
     62 
     63 TEST(ScopedHandle, Swap) {
     64     ScopedHandle h1;
     65     ScopedHandle h2(OpenNull());
     66     EXPECT_FALSE(h1.valid());
     67     EXPECT_TRUE(h2.valid());
     68     h1.swap(&h2);
     69     EXPECT_FALSE(h2.valid());
     70     EXPECT_TRUE(h1.valid());
     71 }
     72 
     73 }  // namespace base
     74 }  // namespace android
     75