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/*
* Copyright (C) 2018 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "android-base/mapped_file.h"
#include <gtest/gtest.h>
#include <errno.h>
#include <fcntl.h>
#include <unistd.h>
#include <string>
#include "android-base/file.h"
TEST(mapped_file, smoke) {
TemporaryFile tf;
ASSERT_TRUE(tf.fd != -1);
ASSERT_TRUE(android::base::WriteStringToFd("hello world", tf.fd));
auto m = android::base::MappedFile::FromFd(tf.fd, 3, 2, PROT_READ);
ASSERT_EQ(2u, m->size());
ASSERT_EQ('l', m->data()[0]);
ASSERT_EQ('o', m->data()[1]);
}
TEST(mapped_file, zero_length_mapping) {
// http://b/119818070 "app crashes when reading asset of zero length".
// mmap fails with EINVAL for a zero length region.
TemporaryFile tf;
ASSERT_TRUE(tf.fd != -1);
auto m = android::base::MappedFile::FromFd(tf.fd, 4096, 0, PROT_READ);
EXPECT_EQ(0u, m->size());
EXPECT_NE(nullptr, m->data());
}
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