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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#include <vespa/vespalib/testkit/testapp.h>
#include <vespa/vespalib/encoding/base64.h>
#include <vector>
using namespace vespalib;
TEST_SETUP(Test);
int
Test::Main()
{
TEST_INIT("base64_test");
// Basic test without padding
std::string source = "No need to pad this string.";
std::string encoded = Base64::encode(source);
std::string expected = "Tm8gbmVlZCB0byBwYWQgdGhpcyBzdHJpbmcu";
std::string decoded = Base64::decode(encoded);
EXPECT_EQUAL(expected, encoded);
EXPECT_EQUAL(source, decoded);
EXPECT_TRUE(static_cast<uint32_t>(
Base64::getMaximumEncodeLength(source.size())) >= encoded.size());
EXPECT_TRUE(static_cast<uint32_t>(
Base64::getMaximumDecodeLength(encoded.size())) >= source.size());
// Basic string that needs padding
source = "This string will need to be padded.";
encoded = Base64::encode(source);
expected = "VGhpcyBzdHJpbmcgd2lsbCBuZWVkIHRvIGJlIHBhZGRlZC4=";
decoded = Base64::decode(encoded);
EXPECT_EQUAL(expected, encoded);
EXPECT_EQUAL(source, decoded);
EXPECT_TRUE(static_cast<uint32_t>(
Base64::getMaximumEncodeLength(source.size())) >= encoded.size());
EXPECT_TRUE(static_cast<uint32_t>(
Base64::getMaximumDecodeLength(encoded.size())) >= source.size());
// Check that max sizes are good for whatever input sizes
source = "";
for (uint32_t i=0; i<100; ++i) {
source += "a";
// Code will assert if -1 is returned from either
// getMaximumEncodeLength() or getMaximumDecodeLength().
encoded = Base64::encode(source);
decoded = Base64::decode(encoded);
EXPECT_EQUAL(source, decoded);
}
// Check that -1 is returned on too little space when encoding
source = "Checking that -1 is returned when not enough space to encode";
std::vector<char> buffer(100, '\0');
uint32_t minSizeNeeded = 81;
for (uint32_t i=0; i<minSizeNeeded; ++i) {
EXPECT_EQUAL(-1, Base64::encode(source.c_str(), source.size(),
&buffer[0], i));
}
EXPECT_EQUAL(80, Base64::encode(source.c_str(), source.size(),
&buffer[0], minSizeNeeded));
EXPECT_EQUAL(Base64::encode(source), std::string(&buffer[0], 80));
EXPECT_TRUE(minSizeNeeded <= static_cast<uint32_t>(
Base64::getMaximumEncodeLength(source.size())));
EXPECT_TRUE(buffer[80] == '\0');
// Check that -1 is returned on too little space when decoding
encoded = Base64::encode(source);
minSizeNeeded = 60;
for (uint32_t i=0; i<minSizeNeeded; ++i) {
EXPECT_EQUAL(-1, Base64::decode(encoded.c_str(), encoded.size(),
&buffer[0], i));
}
EXPECT_EQUAL(60, Base64::decode(encoded.c_str(), encoded.size(),
&buffer[0], minSizeNeeded));
EXPECT_EQUAL(source, std::string(&buffer[0], 60));
TEST_DONE();
}
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