51 lines
1.3 KiB
C++
51 lines
1.3 KiB
C++
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// Copyright 2022 The Pigweed Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License"); you may not
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// use this file except in compliance with the License. You may obtain a copy of
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// the License at
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//
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// https://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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// License for the specific language governing permissions and limitations under
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// the License.
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#include "pw_bytes/bit.h"
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#include <cstdint>
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#include <cstring>
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#include "gtest/gtest.h"
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namespace pw::bytes {
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namespace {
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TEST(Endian, NativeIsBigOrLittle) {
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EXPECT_TRUE(endian::native == endian::little ||
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endian::native == endian::big);
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}
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TEST(Endian, NativeIsCorrect) {
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constexpr uint32_t kInteger = 0x11223344u;
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int8_t bytes[sizeof(kInteger)] = {};
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std::memcpy(bytes, &kInteger, sizeof(kInteger));
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if (endian::native == endian::little) {
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EXPECT_EQ(bytes[0], 0x44);
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EXPECT_EQ(bytes[1], 0x33);
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EXPECT_EQ(bytes[2], 0x22);
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EXPECT_EQ(bytes[3], 0x11);
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} else {
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EXPECT_EQ(bytes[0], 0x11);
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EXPECT_EQ(bytes[1], 0x22);
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EXPECT_EQ(bytes[2], 0x33);
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EXPECT_EQ(bytes[3], 0x44);
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}
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}
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} // namespace
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} // namespace pw::bytes
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