Jed Davis
1485e9ce0d
This adds some affordances for testing which might have other uses: * A test fixture class which allows access to otherwise private operations, to test what happens in situations normally disallowed by C++ types * A mock IPC actor that turns deserialization FatalError calls into non-fatal logging, to test that invalid input is correctly rejected without the overhead of gtest death tests * SerializeAndDeserialize is now factored out and type-generic Differential Revision: https://phabricator.services.mozilla.com/D306582
77 lines
2.1 KiB
C++
77 lines
2.1 KiB
C++
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this file,
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* You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "IPCTestUtils.h"
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#include "chrome/common/ipc_message.h"
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#include "chrome/common/ipc_message_utils.h"
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#include "gtest/gtest.h"
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#include "mozilla/RandomNum.h"
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#include "mozilla/ipc/BigBuffer.h"
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namespace mozilla::ipc {
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TEST(BigBuffer, Empty)
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{
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BigBuffer in(0);
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EXPECT_EQ(in.GetSharedMemory(), nullptr);
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EXPECT_EQ(in.Size(), 0u);
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BigBuffer out;
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ASSERT_TRUE(SerializeAndDeserialize(std::move(in), &out));
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EXPECT_EQ(in.GetSharedMemory(), nullptr);
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EXPECT_EQ(in.Size(), 0u);
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EXPECT_EQ(out.GetSharedMemory(), nullptr);
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EXPECT_EQ(out.Size(), 0u);
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}
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TEST(BigBuffer, SmallSize)
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{
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uint8_t data[]{1, 2, 3};
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BigBuffer in{Span(data)};
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EXPECT_EQ(in.GetSharedMemory(), nullptr);
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EXPECT_EQ(in.Size(), 3u);
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BigBuffer out;
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ASSERT_TRUE(SerializeAndDeserialize(std::move(in), &out));
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EXPECT_EQ(in.GetSharedMemory(), nullptr);
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EXPECT_EQ(in.Size(), 0u);
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EXPECT_EQ(out.GetSharedMemory(), nullptr);
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EXPECT_EQ(out.Size(), 3u);
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EXPECT_TRUE(out.AsSpan() == Span(data));
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}
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TEST(BigBuffer, BigSize)
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{
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// Use something that's unlikely to be a multiple of the page size to ensure
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// that the requested size is retained (versus the allocated shmem size).
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size_t size = BigBuffer::kShmemThreshold * 2 + 41;
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// Generate a large block of random data which will be serialized in a shmem.
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nsTArray<uint8_t> data(size);
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for (size_t i = 0; i < size; ++i) {
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data.AppendElement(mozilla::RandomUint64OrDie());
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}
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BigBuffer in{Span(data)};
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EXPECT_NE(in.GetSharedMemory(), nullptr);
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EXPECT_EQ(in.Size(), size);
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EXPECT_EQ(in.GetSharedMemory()->DataAs<uint8_t>(), in.Data());
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BigBuffer out;
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ASSERT_TRUE(SerializeAndDeserialize(std::move(in), &out));
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EXPECT_EQ(in.GetSharedMemory(), nullptr);
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EXPECT_EQ(in.Size(), 0u);
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EXPECT_NE(out.GetSharedMemory(), nullptr);
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EXPECT_EQ(out.Size(), size);
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EXPECT_EQ(out.GetSharedMemory()->DataAs<uint8_t>(), out.Data());
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EXPECT_TRUE(out.AsSpan() == Span(data));
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}
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} // namespace mozilla::ipc
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