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// Copyright 2019 Google LLC
//
// 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
//
// https://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.
// Tests for generated code for "bits" types, using bits.emb.
#include <stdint.h>
#include <vector>
#include "gtest/gtest.h"
#include "public/emboss_cpp_util.h"
#include "testdata/bits.emb.h"
namespace emboss {
namespace test {
namespace {
TEST(Bits, OneByteView) {
::std::uint8_t data[] = {0x2b};
auto one_byte = GenericOneByteView<support::BitBlock<
support::LittleEndianByteOrderer<support::ReadWriteContiguousBuffer>, 8>>{
support::BitBlock<
support::LittleEndianByteOrderer<support::ReadWriteContiguousBuffer>,
8>{support::ReadWriteContiguousBuffer{data, sizeof data}}};
EXPECT_EQ(0xa, one_byte.mid_nibble().Read());
EXPECT_EQ(0, one_byte.high_bit().Read());
EXPECT_EQ(1, one_byte.low_bit().Read());
one_byte.less_high_bit().Write(1);
EXPECT_EQ(0x6b, data[0]);
one_byte.less_low_bit().Write(0);
EXPECT_EQ(0x69, data[0]);
one_byte.mid_nibble().Write(5);
EXPECT_EQ(0x55, data[0]);
}
TEST(Bits, StructOfBits) {
alignas(8)::std::uint8_t data[] = {0xe8, 0x7f, 0xfe, 0xf1, 0xff, 0xbf, 0x3d};
auto struct_of_bits =
MakeAlignedStructOfBitsView</**/ ::std::uint8_t, 8>(data, sizeof data);
EXPECT_EQ(0xa, struct_of_bits.one_byte().mid_nibble().Read());
EXPECT_FALSE(struct_of_bits.Ok());
EXPECT_FALSE(struct_of_bits.located_byte().Ok());
struct_of_bits.one_byte().mid_nibble().Write(0x01);
EXPECT_EQ(0xc4, data[0]);
EXPECT_TRUE(struct_of_bits.Ok());
EXPECT_TRUE(struct_of_bits.located_byte().Ok());
EXPECT_EQ(0x7f, struct_of_bits.located_byte().Read());
EXPECT_EQ(0x9, struct_of_bits.two_byte().mid_nibble().Read());
EXPECT_EQ(0x6, struct_of_bits.four_byte().one_byte().mid_nibble().Read());
EXPECT_EQ(0x3, struct_of_bits.four_byte().high_nibble().Read());
struct_of_bits.four_byte().one_byte().mid_nibble().Write(0x9);
EXPECT_EQ(0x7f, data[5]);
EXPECT_EQ(0x3e, data[6]);
EXPECT_EQ(101, struct_of_bits.four_byte().low_nibble().Read());
struct_of_bits.four_byte().low_nibble().Write(115);
EXPECT_EQ(0xff, data[3]);
// Out-of-[range] write.
EXPECT_DEATH(struct_of_bits.four_byte().low_nibble().Write(100), "");
}
TEST(Bits, StructOfBitsFromText) {
alignas(8)::std::uint8_t data[] = {0xe8, 0x7f, 0xfe, 0xf1, 0xff, 0xbf, 0x3d};
auto struct_of_bits =
MakeAlignedStructOfBitsView</**/ ::std::uint8_t, 8>(data, sizeof data);
EXPECT_TRUE(::emboss::UpdateFromText(struct_of_bits, R"(
{
one_byte: {
high_bit: false
mid_nibble: 0x01
}
four_byte: {
one_byte: {
mid_nibble: 0x9
}
low_nibble: 115
}
}
)"));
EXPECT_EQ(0x44, data[0]);
EXPECT_EQ(0x7f, data[5]);
EXPECT_EQ(0x3e, data[6]);
EXPECT_EQ(0xff, data[3]);
}
TEST(Bits, ArrayOfBits) {
alignas(8)::std::uint8_t data[] = {0xe8, 0x7f, 0xfe, 0xf1,
0xff, 0xbf, 0x00, 0x3d};
auto bit_array =
MakeAlignedBitArrayView</**/ ::std::uint8_t, 8>(data, sizeof data);
EXPECT_EQ(0xa, bit_array.one_byte()[0].mid_nibble().Read());
EXPECT_EQ(0xf, bit_array.one_byte()[7].mid_nibble().Read());
bit_array.one_byte()[7].mid_nibble().Write(0x0);
EXPECT_EQ(0x01, data[7]);
EXPECT_TRUE(bit_array.Ok());
bit_array =
MakeAlignedBitArrayView</**/ ::std::uint8_t, 8>(data, sizeof data - 1);
EXPECT_FALSE(bit_array.Ok());
}
TEST(Bits, ArrayInBits) {
::std::uint8_t data[] = {0xaa, 0xaa};
auto array = ArrayInBitsInStructWriter{data, sizeof data};
EXPECT_EQ(false, array.array_in_bits().flags()[0].Read());
EXPECT_EQ(true, array.array_in_bits().flags()[1].Read());
EXPECT_EQ(false, array.array_in_bits().flags()[10].Read());
EXPECT_EQ(true, array.array_in_bits().flags()[11].Read());
array.array_in_bits().flags()[8].Write(true);
EXPECT_EQ(0xab, data[1]);
EXPECT_EQ(12U, array.array_in_bits().flags().SizeInBits());
EXPECT_EQ(12U, array.array_in_bits().flags().ElementCount());
EXPECT_TRUE(array.array_in_bits().flags().Ok());
EXPECT_TRUE(array.array_in_bits().flags().IsComplete());
}
TEST(Bits, ArrayInBitsFromText) {
::std::uint8_t data[] = {0, 0};
auto array = ArrayInBitsInStructWriter{data, sizeof data};
EXPECT_TRUE(::emboss::UpdateFromText(array.array_in_bits(), R"(
{
lone_flag: true
flags: { true, false, true, false, true, false,
true, false, true, false, true, false }
}
)"));
EXPECT_EQ(0x55, data[0]);
EXPECT_EQ(0x85, data[1]);
}
TEST(Bits, ArrayInBitsToText) {
::std::uint8_t data[] = {0x55, 0x85};
auto array = ArrayInBitsInStructWriter{data, sizeof data};
EXPECT_EQ(
"{\n"
" lone_flag: true\n"
" flags: {\n"
" [0]: true\n"
" [1]: false\n"
" [2]: true\n"
" [3]: false\n"
" [4]: true\n"
" [5]: false\n"
" [6]: true\n"
" [7]: false\n"
" [8]: true\n"
" [9]: false\n"
" [10]: true\n"
" [11]: false\n"
" }\n"
"}",
::emboss::WriteToString(array.array_in_bits(),
::emboss::MultilineText()));
}
TEST(Bits, CopyFrom) {
::std::array</**/ ::std::uint8_t, 4> buf_x = {0x00, 0x00};
::std::array</**/ ::std::uint8_t, 4> buf_y = {0xff, 0xff};
auto x = ArrayInBitsInStructWriter{&buf_x};
auto y = ArrayInBitsInStructWriter{&buf_y};
EXPECT_NE(x.array_in_bits().flags()[0].Read(),
y.array_in_bits().flags()[0].Read());
x.array_in_bits().flags()[0].CopyFrom(y.array_in_bits().flags()[0]);
EXPECT_EQ(x.array_in_bits().flags()[0].Read(),
y.array_in_bits().flags()[0].Read());
EXPECT_NE(x.array_in_bits().flags()[1].Read(),
y.array_in_bits().flags()[1].Read());
EXPECT_NE(x.array_in_bits().flags()[10].Read(),
y.array_in_bits().flags()[10].Read());
EXPECT_NE(x.array_in_bits().flags()[11].Read(),
y.array_in_bits().flags()[11].Read());
}
TEST(Bits, TryToCopyFrom) {
::std::array</**/ ::std::uint8_t, 4> buf_x = {0x00, 0x00};
::std::array</**/ ::std::uint8_t, 4> buf_y = {0xff, 0xff};
auto x = ArrayInBitsInStructWriter{&buf_x};
auto y = ArrayInBitsInStructWriter{&buf_y};
EXPECT_NE(x.array_in_bits().flags()[0].Read(),
y.array_in_bits().flags()[0].Read());
EXPECT_TRUE(
x.array_in_bits().flags()[0].TryToCopyFrom(y.array_in_bits().flags()[0]));
EXPECT_EQ(x.array_in_bits().flags()[0].Read(),
y.array_in_bits().flags()[0].Read());
EXPECT_NE(x.array_in_bits().flags()[1].Read(),
y.array_in_bits().flags()[1].Read());
EXPECT_NE(x.array_in_bits().flags()[10].Read(),
y.array_in_bits().flags()[10].Read());
EXPECT_NE(x.array_in_bits().flags()[11].Read(),
y.array_in_bits().flags()[11].Read());
}
TEST(Bits, Equals) {
alignas(8)::std::uint8_t buf_x[] = {0xe8, 0x7f, 0xfe, 0xf1,
0xff, 0xbf, 0x00, 0x3d};
alignas(8)::std::uint8_t buf_y[] = {0xe8, 0x7f, 0xfe, 0xf1,
0xff, 0xbf, 0x00, 0x3d};
auto x = MakeAlignedBitArrayView</**/ ::std::uint8_t, 8>(buf_x, sizeof buf_x);
auto x_const =
MakeBitArrayView(static_cast</**/ ::std::uint8_t *>(buf_x), sizeof buf_x);
auto y = MakeAlignedBitArrayView</**/ ::std::uint8_t, 8>(buf_y, sizeof buf_y);
EXPECT_TRUE(x.Equals(x));
EXPECT_TRUE(x.UncheckedEquals(x));
EXPECT_TRUE(y.Equals(y));
EXPECT_TRUE(y.UncheckedEquals(y));
EXPECT_TRUE(x.Equals(y));
EXPECT_TRUE(x.UncheckedEquals(y));
EXPECT_TRUE(y.Equals(x));
EXPECT_TRUE(y.UncheckedEquals(x));
EXPECT_TRUE(x_const.Equals(y));
EXPECT_TRUE(x_const.UncheckedEquals(y));
EXPECT_TRUE(y.Equals(x_const));
EXPECT_TRUE(y.UncheckedEquals(x_const));
++buf_y[1];
EXPECT_FALSE(x.Equals(y));
EXPECT_FALSE(x.UncheckedEquals(y));
EXPECT_FALSE(y.Equals(x));
EXPECT_FALSE(y.UncheckedEquals(x));
EXPECT_FALSE(x_const.Equals(y));
EXPECT_FALSE(x_const.UncheckedEquals(y));
EXPECT_FALSE(y.Equals(x_const));
EXPECT_FALSE(y.UncheckedEquals(x_const));
}
} // namespace
} // namespace test
} // namespace emboss