src/llvm/unittests/Bitcode/BitstreamReaderTest.cpp

   1 //===- BitstreamReaderTest.cpp - Tests for BitstreamReader ----------------===//
   2 //
   3 //                     The LLVM Compiler Infrastructure
   4 //
   5 // This file is distributed under the University of Illinois Open Source
   6 // License. See LICENSE.TXT for details.
   7 //
   8 //===----------------------------------------------------------------------===//
   9
  10 #include "llvm/Bitcode/BitstreamReader.h"
  11 #include "gtest/gtest.h"
  12
  13 using namespace llvm;
  14
  15 namespace {
  16
  17 TEST(BitstreamReaderTest, AtEndOfStream) {
  18   uint8_t Bytes[4] = {
  19     0x00, 0x01, 0x02, 0x03
  20   };
  21   BitstreamReader Reader(std::begin(Bytes), std::end(Bytes));
  22   BitstreamCursor Cursor(Reader);
  23
  24   EXPECT_FALSE(Cursor.AtEndOfStream());
  25   (void)Cursor.Read(8);
  26   EXPECT_FALSE(Cursor.AtEndOfStream());
  27   (void)Cursor.Read(24);
  28   EXPECT_TRUE(Cursor.AtEndOfStream());
  29
  30   Cursor.JumpToBit(0);
  31   EXPECT_FALSE(Cursor.AtEndOfStream());
  32
  33   Cursor.JumpToBit(32);
  34   EXPECT_TRUE(Cursor.AtEndOfStream());
  35 }
  36
  37 TEST(BitstreamReaderTest, AtEndOfStreamJump) {
  38   uint8_t Bytes[4] = {
  39     0x00, 0x01, 0x02, 0x03
  40   };
  41   BitstreamReader Reader(std::begin(Bytes), std::end(Bytes));
  42   BitstreamCursor Cursor(Reader);
  43
  44   Cursor.JumpToBit(32);
  45   EXPECT_TRUE(Cursor.AtEndOfStream());
  46 }
  47
  48 TEST(BitstreamReaderTest, AtEndOfStreamEmpty) {
  49   uint8_t Dummy = 0xFF;
  50   BitstreamReader Reader(&Dummy, &Dummy);
  51   BitstreamCursor Cursor(Reader);
  52
  53   EXPECT_TRUE(Cursor.AtEndOfStream());
  54 }
  55
  56 } // end anonymous namespace