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support base85 encoding/decoding

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PiperOrigin-RevId: 725692677
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Guogang Li
2025-02-11 10:50:44 -08:00
committed by Copybara-Service
parent 7b31ce68c4
commit 58eea077e1
5 changed files with 343 additions and 0 deletions
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internal/encoding/base85_test.cc
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// Copyright 2025 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.
#include "internal/encoding/base85.h"
#include <string>
#include "gtest/gtest.h"
namespace nearby {
namespace encoding {
namespace {
TEST(Base85Test, EncodeAndDecodeString) {
EXPECT_EQ(Base85Encode(""), "");
EXPECT_EQ(Base85Decode(Base85Encode("")), "");
EXPECT_EQ(Base85Encode("b"), "@K");
EXPECT_EQ(Base85Decode(Base85Encode("b")), "b");
EXPECT_EQ(Base85Encode("ab"), "@:B");
EXPECT_EQ(Base85Decode(Base85Encode("ab")), "ab");
EXPECT_EQ(Base85Encode("xyz"), "G^4T");
EXPECT_EQ(Base85Decode(Base85Encode("xyz")), "xyz");
EXPECT_EQ(Base85Encode("true"), "FE2M8");
EXPECT_EQ(Base85Decode(Base85Encode("true")), "true");
EXPECT_EQ(Base85Encode("ab", /*padding=*/true), "@:B3:");
std::string expected_decoded_string = "ab";
expected_decoded_string.push_back('\0');
expected_decoded_string.push_back('\0');
EXPECT_EQ(Base85Decode(Base85Encode("ab", /*padding=*/true)),
expected_decoded_string);
EXPECT_EQ(Base85Encode("hello,world"), "BOu!rD_-*NEbo7");
EXPECT_EQ(Base85Decode("BOu!rD_-*NEbo7"), "hello,world");
EXPECT_EQ(Base85Encode("abcdefgh"), "@:E_WAS,Rg");
EXPECT_EQ(Base85Decode(Base85Encode("abcdefgh")), "abcdefgh");
}
TEST(Base85Test, EncodeAndDecodeBytes) {
std::string data;
data.push_back(0x00);
EXPECT_EQ(Base85Encode(data), "z");
std::string expected_data;
expected_data.push_back(0x00);
expected_data.push_back(0x00);
expected_data.push_back(0x00);
expected_data.push_back(0x00);
EXPECT_EQ(Base85Decode(Base85Encode(data)), expected_data);
data.clear();
data.push_back(0x00);
data.push_back(0x01);
EXPECT_EQ(Base85Encode(data), "!!*");
data.clear();
data.push_back(0x00);
data.push_back(0x01);
data.push_back(0xff);
EXPECT_EQ(Base85Encode(data), "!!3*");
EXPECT_EQ(Base85Decode(Base85Encode(data)), data);
}
TEST(Base85Test, InvalideEncodedString) {
EXPECT_FALSE(Base85Decode("abhjki"));
EXPECT_FALSE(Base85Decode("abz"));
EXPECT_FALSE(Base85Decode("u`qL["));
}
} // namespace
} // namespace encoding
} // namespace nearby