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991831227e
Make it separate from Hash, since other things can be base-encoded too. This isn't really needed for Nix, but it makes the code easier to read e.g. for someone reimplementing this stuff in a different language. (Of course, Base16/Base64 should be gotten off-the-shelf, but now the hash code, which is more bespoke, is less cluttered with the parts that would be from some library.) Many reimplementations of "Nix32" and our hash type already exist, so this cleanup is coming years too late, but I say better late than never / it is always good to nudge the code in the direction of being a "living spec". Co-authored-by: Sergei Zimmerman <sergei@zimmerman.foo>
68 lines
1.7 KiB
C++
68 lines
1.7 KiB
C++
#include <gtest/gtest.h>
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#include <numeric>
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#include "nix/util/base-n.hh"
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#include "nix/util/error.hh"
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namespace nix {
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static const std::span<const std::byte> stringToByteSpan(const std::string_view s)
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{
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return {(const std::byte *) s.data(), s.size()};
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}
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/* ----------------------------------------------------------------------------
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* base64::encode
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* --------------------------------------------------------------------------*/
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TEST(base64Encode, emptyString)
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{
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ASSERT_EQ(base64::encode(stringToByteSpan("")), "");
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}
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TEST(base64Encode, encodesAString)
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{
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ASSERT_EQ(base64::encode(stringToByteSpan("quod erat demonstrandum")), "cXVvZCBlcmF0IGRlbW9uc3RyYW5kdW0=");
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}
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TEST(base64Encode, encodeAndDecode)
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{
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auto s = "quod erat demonstrandum";
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auto encoded = base64::encode(stringToByteSpan(s));
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auto decoded = base64::decode(encoded);
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ASSERT_EQ(decoded, s);
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}
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TEST(base64Encode, encodeAndDecodeNonPrintable)
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{
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char s[256];
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std::iota(std::rbegin(s), std::rend(s), 0);
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auto encoded = base64::encode(std::as_bytes(std::span<const char>{std::string_view{s}}));
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auto decoded = base64::decode(encoded);
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EXPECT_EQ(decoded.length(), 255u);
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ASSERT_EQ(decoded, s);
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}
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/* ----------------------------------------------------------------------------
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* base64::decode
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* --------------------------------------------------------------------------*/
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TEST(base64Decode, emptyString)
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{
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ASSERT_EQ(base64::decode(""), "");
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}
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TEST(base64Decode, decodeAString)
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{
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ASSERT_EQ(base64::decode("cXVvZCBlcmF0IGRlbW9uc3RyYW5kdW0="), "quod erat demonstrandum");
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}
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TEST(base64Decode, decodeThrowsOnInvalidChar)
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{
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ASSERT_THROW(base64::decode("cXVvZCBlcm_0IGRlbW9uc3RyYW5kdW0="), Error);
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}
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} // namespace nix
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