MemoryBufferTest.cpp revision 2d6d585c85ce8c56461f17b7b49fff24eed7b8fb 
1//===- llvm/unittest/Support/MemoryBufferTest.cpp - MemoryBuffer tests ----===//
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// This file implements unit tests for the MemoryBuffer support class.
11//
12//===----------------------------------------------------------------------===//
13
14#include "llvm/Support/MemoryBuffer.h"
15#include "llvm/ADT/OwningPtr.h"
16
17#include "gtest/gtest.h"
18
19using namespace llvm;
20
21class MemoryBufferTest : public testing::Test {
22protected:
23  MemoryBufferTest()
24  : data("this is some data")
25  { }
26
27  virtual void SetUp() { }
28
29  typedef OwningPtr<MemoryBuffer> OwningBuffer;
30
31  std::string data;
32};
33
34namespace {
35
36TEST_F(MemoryBufferTest, get) {
37  // Default name and null-terminator flag
38  OwningBuffer MB1(MemoryBuffer::getMemBuffer(data));
39  EXPECT_TRUE(0 != MB1.get());
40
41  // RequiresNullTerminator = false
42  OwningBuffer MB2(MemoryBuffer::getMemBuffer(data, "one", false));
43  EXPECT_TRUE(0 != MB2.get());
44
45  // RequiresNullTerminator = true
46  OwningBuffer MB3(MemoryBuffer::getMemBuffer(data, "two", true));
47  EXPECT_TRUE(0 != MB3.get());
48
49  // verify all 3 buffers point to the same address
50  EXPECT_EQ(MB1->getBufferStart(), MB2->getBufferStart());
51  EXPECT_EQ(MB2->getBufferStart(), MB3->getBufferStart());
52
53  // verify the original data is unmodified after deleting the buffers
54  MB1.reset();
55  MB2.reset();
56  MB3.reset();
57  EXPECT_EQ("this is some data", data);
58}
59
60TEST_F(MemoryBufferTest, copy) {
61  // copy with no name
62  OwningBuffer MBC1(MemoryBuffer::getMemBufferCopy(data));
63  EXPECT_TRUE(0 != MBC1.get());
64
65  // copy with a name
66  OwningBuffer MBC2(MemoryBuffer::getMemBufferCopy(data, "copy"));
67  EXPECT_TRUE(0 != MBC2.get());
68
69  // verify the two copies do not point to the same place
70  EXPECT_NE(MBC1->getBufferStart(), MBC2->getBufferStart());
71}
72
73TEST_F(MemoryBufferTest, make_new) {
74  // 0-sized buffer
75  OwningBuffer Zero(MemoryBuffer::getNewUninitMemBuffer(0));
76  EXPECT_TRUE(0 != Zero.get());
77
78  // uninitialized buffer with no name
79  OwningBuffer One(MemoryBuffer::getNewUninitMemBuffer(321));
80  EXPECT_TRUE(0 != One.get());
81
82  // uninitialized buffer with name
83  OwningBuffer Two(MemoryBuffer::getNewUninitMemBuffer(123, "bla"));
84  EXPECT_TRUE(0 != Two.get());
85
86  // 0-initialized buffer with no name
87  OwningBuffer Three(MemoryBuffer::getNewMemBuffer(321, data));
88  EXPECT_TRUE(0 != Three.get());
89  for (size_t i = 0; i < 321; ++i)
90    EXPECT_EQ(0, Three->getBufferStart()[0]);
91
92  // 0-initialized buffer with name
93  OwningBuffer Four(MemoryBuffer::getNewMemBuffer(123, "zeros"));
94  EXPECT_TRUE(0 != Four.get());
95  for (size_t i = 0; i < 123; ++i)
96    EXPECT_EQ(0, Four->getBufferStart()[0]);
97}
98
99}
100