llvm/unittests/Support/raw_ostream_test.cpp

//===- llvm/unittest/Support/raw_ostream.cpp - raw_ostream unit tests -----===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//

#include "gtest/gtest.h"
#include "llvm/Support/raw_ostream.h"

using namespace llvm;

namespace {

template<typename T> std::string printToString(const T &Value) {
  std::string res;
  llvm::raw_string_ostream(res) << Value;
  return res;    
}

template<typename T> std::string printToStringUnbuffered(const T &Value) {
  std::string res;
  llvm::raw_string_ostream OS(res);
  OS.SetUnbuffered();
  OS << Value;
  return res;
}

TEST(raw_ostreamTest, Types_Buffered) {
  // Char
  EXPECT_EQ("c", printToString('c'));

  // String
  EXPECT_EQ("hello", printToString("hello"));
  EXPECT_EQ("hello", printToString(std::string("hello")));

  // Int
  EXPECT_EQ("0", printToString(0));
  EXPECT_EQ("2425", printToString(2425));
  EXPECT_EQ("-2425", printToString(-2425));

  // Long long
  EXPECT_EQ("0", printToString(0LL));
  EXPECT_EQ("257257257235709", printToString(257257257235709LL));
  EXPECT_EQ("-257257257235709", printToString(-257257257235709LL));

  // Double
  EXPECT_EQ("1.100000e+00", printToString(1.1));

  // void*
  EXPECT_EQ("0x0", printToString((void*) 0));
  EXPECT_EQ("0xbeef", printToString((void*) 0xbeef));
  EXPECT_EQ("0xdeadbeef", printToString((void*) 0xdeadbeef));
}

TEST(raw_ostreamTest, Types_Unbuffered) {  
  // Char
  EXPECT_EQ("c", printToStringUnbuffered('c'));

  // String
  EXPECT_EQ("hello", printToStringUnbuffered("hello"));
  EXPECT_EQ("hello", printToStringUnbuffered(std::string("hello")));

  // Int
  EXPECT_EQ("0", printToStringUnbuffered(0));
  EXPECT_EQ("2425", printToStringUnbuffered(2425));
  EXPECT_EQ("-2425", printToStringUnbuffered(-2425));

  // Long long
  EXPECT_EQ("0", printToStringUnbuffered(0LL));
  EXPECT_EQ("257257257235709", printToStringUnbuffered(257257257235709LL));
  EXPECT_EQ("-257257257235709", printToStringUnbuffered(-257257257235709LL));

  // Double
  EXPECT_EQ("1.100000e+00", printToStringUnbuffered(1.1));

  // void*
  EXPECT_EQ("0x0", printToStringUnbuffered((void*) 0));
  EXPECT_EQ("0xbeef", printToStringUnbuffered((void*) 0xbeef));
  EXPECT_EQ("0xdeadbeef", printToStringUnbuffered((void*) 0xdeadbeef));
}

}