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#include "bitstream.h"
#include <gtest/gtest.h>
using namespace NBitStream;
TEST(TBitStream, DefaultConstructor) {
TBitStream bs;
EXPECT_EQ(0u, bs.GetSizeInBits());
}
TEST(TBitStream, SimpleWriteRead) {
TBitStream bs;
bs.Write(5, 3);
EXPECT_EQ(3, bs.GetSizeInBits());
EXPECT_EQ(5, bs.Read(3));
}
TEST(TBisStream, OverlapWriteRead) {
TBitStream bs;
bs.Write(101, 22);
EXPECT_EQ(22, bs.GetSizeInBits());
bs.Write(212, 22);
EXPECT_EQ(44, bs.GetSizeInBits());
bs.Write(323, 22);
EXPECT_EQ(66, bs.GetSizeInBits());
EXPECT_EQ(101, bs.Read(22));
EXPECT_EQ(212, bs.Read(22));
EXPECT_EQ(323, bs.Read(22));
}
TEST(TBisStream, OverlapWriteRead2) {
TBitStream bs;
bs.Write(2, 2);
bs.Write(7, 4);
bs.Write(10003, 16);
EXPECT_EQ(2, bs.Read(2));
EXPECT_EQ(7, bs.Read(4));
EXPECT_EQ(10003, bs.Read(16));
}
TEST(TBisStream, SignWriteRead) {
TBitStream bs;
bs.Write(MakeSign(-2, 3), 3);
bs.Write(MakeSign(-1, 3), 3);
bs.Write(MakeSign(1, 2), 2);
bs.Write(MakeSign(-7, 4), 4);
EXPECT_EQ(-2, MakeSign(bs.Read(3), 3));
EXPECT_EQ(-1, MakeSign(bs.Read(3), 3));
EXPECT_EQ(1, MakeSign(bs.Read(2), 2));
EXPECT_EQ(-7, MakeSign(bs.Read(4), 4));
}
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