unittests/Support/raw_sha1_ostream_test.cpp

   1 //===- llvm/unittest/Support/raw_ostream_test.cpp - raw_ostream tests -----===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 #include "llvm/Support/Format.h"
  10 #include "llvm/Support/raw_sha1_ostream.h"
  11 #include "gtest/gtest.h"
  12
  13 #include <string>
  14
  15 using namespace llvm;
  16
  17 static std::string toHex(StringRef Input) {
  18   static const char *const LUT = "0123456789ABCDEF";
  19   size_t Length = Input.size();
  20
  21   std::string Output;
  22   Output.reserve(2 * Length);
  23   for (size_t i = 0; i < Length; ++i) {
  24     const unsigned char c = Input[i];
  25     Output.push_back(LUT[c >> 4]);
  26     Output.push_back(LUT[c & 15]);
  27   }
  28   return Output;
  29 }
  30
  31 TEST(raw_sha1_ostreamTest, Basic) {
  32   llvm::raw_sha1_ostream Sha1Stream;
  33   Sha1Stream << "Hello World!";
  34   auto Hash = toHex(Sha1Stream.sha1());
  35
  36   ASSERT_EQ("2EF7BDE608CE5404E97D5F042F95F89F1C232871", Hash);
  37 }
  38
  39 TEST(sha1_hash_test, Basic) {
  40   ArrayRef<uint8_t> Input((const uint8_t *)"Hello World!", 12);
  41   std::array<uint8_t, 20> Vec = SHA1::hash(Input);
  42   std::string Hash = toHex({(const char *)Vec.data(), 20});
  43   ASSERT_EQ("2EF7BDE608CE5404E97D5F042F95F89F1C232871", Hash);
  44 }
  45
  46 // Check that getting the intermediate hash in the middle of the stream does
  47 // not invalidate the final result.
  48 TEST(raw_sha1_ostreamTest, Intermediate) {
  49   llvm::raw_sha1_ostream Sha1Stream;
  50   Sha1Stream << "Hello";
  51   auto Hash = toHex(Sha1Stream.sha1());
  52
  53   ASSERT_EQ("F7FF9E8B7BB2E09B70935A5D785E0CC5D9D0ABF0", Hash);
  54   Sha1Stream << " World!";
  55   Hash = toHex(Sha1Stream.sha1());
  56
  57   // Compute the non-split hash separately as a reference.
  58   llvm::raw_sha1_ostream NonSplitSha1Stream;
  59   NonSplitSha1Stream << "Hello World!";
  60   auto NonSplitHash = toHex(NonSplitSha1Stream.sha1());
  61
  62   ASSERT_EQ(NonSplitHash, Hash);
  63 }
  64
  65 TEST(raw_sha1_ostreamTest, Reset) {
  66   llvm::raw_sha1_ostream Sha1Stream;
  67   Sha1Stream << "Hello";
  68   auto Hash = toHex(Sha1Stream.sha1());
  69
  70   ASSERT_EQ("F7FF9E8B7BB2E09B70935A5D785E0CC5D9D0ABF0", Hash);
  71
  72   Sha1Stream.resetHash();
  73   Sha1Stream << " World!";
  74   Hash = toHex(Sha1Stream.sha1());
  75
  76   ASSERT_EQ("7447F2A5A42185C8CF91E632789C431830B59067", Hash);
  77 }