1 /*
2 * Copyright (C) 2018 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/mapped_file.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/file.h"
28
TEST(mapped_file,smoke)29 TEST(mapped_file, smoke) {
30 TemporaryFile tf;
31 ASSERT_TRUE(tf.fd != -1);
32 ASSERT_TRUE(android::base::WriteStringToFd("hello world", tf.fd));
33
34 auto m = android::base::MappedFile::FromFd(tf.fd, 3, 2, PROT_READ);
35 ASSERT_EQ(2u, m->size());
36 ASSERT_EQ('l', m->data()[0]);
37 ASSERT_EQ('o', m->data()[1]);
38 }
39
TEST(mapped_file,zero_length_mapping)40 TEST(mapped_file, zero_length_mapping) {
41 // http://b/119818070 "app crashes when reading asset of zero length".
42 // mmap fails with EINVAL for a zero length region.
43 TemporaryFile tf;
44 ASSERT_TRUE(tf.fd != -1);
45
46 auto m = android::base::MappedFile::FromFd(tf.fd, 4096, 0, PROT_READ);
47 EXPECT_EQ(0u, m->size());
48 EXPECT_NE(nullptr, m->data());
49 }
50