Adding MCJIT and MemoryBuffer unit tests

Patch by Daniel Malea.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@165246 91177308-0d34-0410-b5e6-96231b3b80d8

unittests/Support/MemoryBufferTest.cpp

@@ -0,0 +1,99 @@
+//===- llvm/unittest/Support/MemoryBufferTest.cpp - MemoryBuffer tests ----===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements unit tests for the MemoryBuffer support class.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/Support/MemoryBuffer.h"
+#include "llvm/ADT/OwningPtr.h"
+
+#include "gtest/gtest.h"
+
+using namespace llvm;
+
+class MemoryBufferTest : public testing::Test {
+protected:
+  MemoryBufferTest()
+  : data("this is some data")
+  { }
+
+  virtual void SetUp() { }
+
+  typedef OwningPtr<MemoryBuffer> OwningBuffer;
+
+  std::string data;
+};
+
+namespace {
+
+TEST_F(MemoryBufferTest, get) {
+  // Default name and null-terminator flag
+  OwningBuffer MB1(MemoryBuffer::getMemBuffer(data));
+  EXPECT_TRUE(0 != MB1.get());
+
+  // RequiresNullTerminator = false
+  OwningBuffer MB2(MemoryBuffer::getMemBuffer(data, "one", false));
+  EXPECT_TRUE(0 != MB2.get());
+
+  // RequiresNullTerminator = true
+  OwningBuffer MB3(MemoryBuffer::getMemBuffer(data, "two", true));
+  EXPECT_TRUE(0 != MB3.get());
+
+  // verify all 3 buffers point to the same address
+  EXPECT_EQ(MB1->getBufferStart(), MB2->getBufferStart());
+  EXPECT_EQ(MB2->getBufferStart(), MB3->getBufferStart());
+
+  // verify the original data is unmodified after deleting the buffers
+  MB1.reset();
+  MB2.reset();
+  MB3.reset();
+  EXPECT_EQ("this is some data", data);
+}
+
+TEST_F(MemoryBufferTest, copy) {
+  // copy with no name
+  OwningBuffer MBC1(MemoryBuffer::getMemBufferCopy(data));
+  EXPECT_TRUE(0 != MBC1.get());
+
+  // copy with a name
+  OwningBuffer MBC2(MemoryBuffer::getMemBufferCopy(data, "copy"));
+  EXPECT_TRUE(0 != MBC2.get());
+
+  // verify the two copies do not point to the same place
+  EXPECT_NE(MBC1->getBufferStart(), MBC2->getBufferStart());
+}
+
+TEST_F(MemoryBufferTest, make_new) {
+  // 0-sized buffer
+  OwningBuffer Zero(MemoryBuffer::getNewUninitMemBuffer(0));
+  EXPECT_TRUE(0 != Zero.get());
+
+  // uninitialized buffer with no name
+  OwningBuffer One(MemoryBuffer::getNewUninitMemBuffer(321));
+  EXPECT_TRUE(0 != One.get());
+
+  // uninitialized buffer with name
+  OwningBuffer Two(MemoryBuffer::getNewUninitMemBuffer(123, "bla"));
+  EXPECT_TRUE(0 != Two.get());
+
+  // 0-initialized buffer with no name
+  OwningBuffer Three(MemoryBuffer::getNewMemBuffer(321, data));
+  EXPECT_TRUE(0 != Three.get());
+  for (size_t i = 0; i < 321; ++i)
+    EXPECT_EQ(0, Three->getBufferStart()[0]);
+
+  // 0-initialized buffer with name
+  OwningBuffer Four(MemoryBuffer::getNewMemBuffer(123, "zeros"));
+  EXPECT_TRUE(0 != Four.get());
+  for (size_t i = 0; i < 123; ++i)
+    EXPECT_EQ(0, Four->getBufferStart()[0]);
+}
+
+}