//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//

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

using namespace lldb_dap;
using namespace llvm;
using namespace testing;

static llvm::StringRef last_line(llvm::StringRef str) {
  size_t index = str.find_last_of('\n', str.size() - 1);
  if (index == llvm::StringRef::npos)
    return str;
  return str.substr(index + 1);
}

#define TIMESTAMP_PATTERN "\\[[0-9]{2}:[0-9]{2}:[0-9]{2}\\.[0-9]{3}\\] "

TEST(DAPLog, Emit) {
  Log::Mutex mux;
  std::string outs;
  raw_string_ostream os(outs);
  Log log(os, mux);
  Log inner_log = log.WithPrefix("my_prefix:");

  log.Emit("Hi");
  EXPECT_THAT(last_line(outs), MatchesRegex(TIMESTAMP_PATTERN "Hi\n"));

  inner_log.Emit("foobar");
  EXPECT_THAT(last_line(outs),
              MatchesRegex(TIMESTAMP_PATTERN "my_prefix: foobar\n"));

  log.Emit("Hello from a file/line.", "file.cpp", 42);
  EXPECT_THAT(
      last_line(outs),
      MatchesRegex(TIMESTAMP_PATTERN "file.cpp:42 Hello from a file/line.\n"));

  inner_log.Emit("Hello from a file/line.", "file.cpp", 42);
  EXPECT_THAT(last_line(outs),
              MatchesRegex(TIMESTAMP_PATTERN
                           "file.cpp:42 my_prefix: Hello from a file/line.\n"));

  log.WithPrefix("a").WithPrefix("b").WithPrefix("c").Emit("msg");
  EXPECT_THAT(last_line(outs), MatchesRegex(TIMESTAMP_PATTERN "a b c msg\n"));
}