llvm/unittests/Support/MemoryBufferRefTest.cpp

   1 //===- MemoryBufferRefTest.cpp - MemoryBufferRef 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 // This file implements unit tests for the MemoryBufferRef support class.
  10 //
  11 //===----------------------------------------------------------------------===//
  12
  13 #include "llvm/Support/MemoryBufferRef.h"
  14 #include "llvm/Support/MemoryBuffer.h"
  15 #include "gtest/gtest.h"
  16
  17 using namespace llvm;
  18
  19 namespace {
  20
  21 TEST(MemoryBufferRefTest, construct) {
  22   std::unique_ptr<MemoryBuffer> MB(MemoryBuffer::getMemBuffer("data", "id"));
  23   MemoryBufferRef MBR(*MB);
  24
  25   EXPECT_EQ(MB->getBufferStart(), MBR.getBufferStart());
  26   EXPECT_EQ(MB->getBufferIdentifier(), MBR.getBufferIdentifier());
  27 }
  28
  29 TEST(MemoryBufferRefTest, compareEquals) {
  30   std::string Data = "data";
  31   std::unique_ptr<MemoryBuffer> MB(MemoryBuffer::getMemBuffer(Data, "id"));
  32   MemoryBufferRef Ref(*MB);
  33   MemoryBufferRef Empty;
  34   MemoryBufferRef NoIdentifier(MB->getBuffer(), "");
  35   MemoryBufferRef NoData("", MB->getBufferIdentifier());
  36   MemoryBufferRef Same(MB->getBuffer(), MB->getBufferIdentifier());
  37
  38   EXPECT_NE(Empty, Ref);
  39   EXPECT_NE(NoIdentifier, Ref);
  40   EXPECT_NE(NoData, Ref);
  41   EXPECT_EQ(Same, Ref);
  42
  43   // Confirm NE when content matches but pointer identity does not.
  44   std::unique_ptr<MemoryBuffer> Copy(
  45       MemoryBuffer::getMemBufferCopy(Data, "id"));
  46   MemoryBufferRef CopyRef(*Copy);
  47   EXPECT_EQ(Ref.getBuffer(), CopyRef.getBuffer());
  48   EXPECT_NE(Ref, CopyRef);
  49 }
  50
  51 } // end namespace