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Add a simple unit test for MemoryBuffer::getOpenFile

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@186887 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Eli Bendersky 2013-07-22 22:46:21 +00:00
parent bd8f8a34ba
commit f65712bfe3
1 changed files with 33 additions and 0 deletions
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33
unittests/Support/MemoryBufferTest.cpp
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@ -11,7 +11,9 @@
//
//===----------------------------------------------------------------------===//
#include "llvm/Support/FileSystem.h"
#include "llvm/Support/MemoryBuffer.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/ADT/OwningPtr.h"
#include "gtest/gtest.h"
@ -95,4 +97,35 @@ TEST_F(MemoryBufferTest, make_new) {
EXPECT_EQ(0, Four->getBufferStart()[0]);
}
TEST_F(MemoryBufferTest, getOpenFileNoNullTerminator) {
// Test that MemoryBuffer::getOpenFile works properly when no null
// terminator is requested and the size is large enough to trigger
// the usage of memory mapping.
int TestFD;
SmallString<64> TestPath;
// Create a temporary file and write data into it.
sys::fs::createTemporaryFile("prefix", "temp", TestFD, TestPath);
// OF is responsible for closing the file, and is unbuffered so that
// the results are immediately visible through the fd.
raw_fd_ostream OF(TestFD, true, true);
for (int i = 0; i < 60000; ++i) {
OF << "0123456789";
}
OwningBuffer Buf;
error_code EC = MemoryBuffer::getOpenFile(TestFD,
TestPath.c_str(),
Buf,
40000, // Size
-1,
8000, // Offset
false);
EXPECT_FALSE(EC);
StringRef BufData = Buf->getBuffer();
EXPECT_EQ(BufData.size(), 40000U);
EXPECT_EQ(BufData[0], '0');
EXPECT_EQ(BufData[9], '9');
}
}