//===-- unittests/Runtime/Stop.cpp ------------------------------*- C++ -*-===//
//
// 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
//
//===----------------------------------------------------------------------===//
//
/// Test runtime API for STOP statement and runtime API to kill the program.
//
//===----------------------------------------------------------------------===//

#include "flang/Runtime/stop.h"
#include "CrashHandlerFixture.h"
#include "flang-rt/runtime/environment.h"
#include <cstdlib>
#include <cstring>
#include <gtest/gtest.h>

using namespace Fortran::runtime;

struct TestProgramEnd : CrashHandlerFixture {};

TEST_F(TestProgramEnd, StopTest) {
  EXPECT_EXIT(RTNAME(StopStatement)(), testing::ExitedWithCode(EXIT_SUCCESS),
      "Fortran STOP");
}

TEST_F(TestProgramEnd, StopTestNoStopMessage) {
  EXPECT_EXIT(
      {
        static char noStopMessage[] = "NO_STOP_MESSAGE=1";
        putenv(noStopMessage);
        Fortran::runtime::executionEnvironment.Configure(
            0, nullptr, nullptr, nullptr);
        RTNAME(StopStatement)();
      },
      testing::ExitedWithCode(EXIT_SUCCESS), "");
}

TEST_F(TestProgramEnd, StopMessageTest) {
  static const char *message{"bye bye"};
  EXPECT_EXIT(RTNAME(StopStatementText)(message, std::strlen(message),
                  /*isErrorStop=*/false, /*quiet=*/false),
      testing::ExitedWithCode(EXIT_SUCCESS), "Fortran STOP: bye bye");

  EXPECT_EXIT(RTNAME(StopStatementText)(message, std::strlen(message),
                  /*isErrorStop=*/false, /*quiet=*/true),
      testing::ExitedWithCode(EXIT_SUCCESS), "");

  EXPECT_EXIT(RTNAME(StopStatementText)(message, std::strlen(message),
                  /*isErrorStop=*/true, /*quiet=*/false),
      testing::ExitedWithCode(EXIT_FAILURE), "Fortran ERROR STOP: bye bye");

  EXPECT_EXIT(RTNAME(StopStatementText)(message, std::strlen(message),
                  /*isErrorStop=*/true, /*quiet=*/true),
      testing::ExitedWithCode(EXIT_FAILURE), "");
}

TEST_F(TestProgramEnd, NoStopMessageTest) {
  static const char *message{"bye bye"};
  EXPECT_EXIT(
      {
        static char noStopMessage[] = "NO_STOP_MESSAGE=1";
        putenv(noStopMessage);
        Fortran::runtime::executionEnvironment.Configure(
            0, nullptr, nullptr, nullptr);
        RTNAME(StopStatementText)(message, std::strlen(message),
            /*isErrorStop=*/false, /*quiet=*/false);
      },
      testing::ExitedWithCode(EXIT_SUCCESS), "bye bye");

  EXPECT_EXIT(
      {
        static char noStopMessage[] = "NO_STOP_MESSAGE=1";
        putenv(noStopMessage);
        Fortran::runtime::executionEnvironment.Configure(
            0, nullptr, nullptr, nullptr);
        RTNAME(StopStatementText)(message, std::strlen(message),
            /*isErrorStop=*/false, /*quiet=*/true);
      },
      testing::ExitedWithCode(EXIT_SUCCESS), "");

  EXPECT_EXIT(
      {
        static char noStopMessage[] = "NO_STOP_MESSAGE=1";
        putenv(noStopMessage);
        Fortran::runtime::executionEnvironment.Configure(
            0, nullptr, nullptr, nullptr);
        RTNAME(StopStatementText)(message, std::strlen(message),
            /*isErrorStop=*/true, /*quiet=*/false);
      },
      testing::ExitedWithCode(EXIT_FAILURE), "Fortran ERROR STOP: bye bye");

  EXPECT_EXIT(
      {
        static char noStopMessage[] = "NO_STOP_MESSAGE=1";
        putenv(noStopMessage);
        Fortran::runtime::executionEnvironment.Configure(
            0, nullptr, nullptr, nullptr);
        RTNAME(StopStatementText)(message, std::strlen(message),
            /*isErrorStop=*/true, /*quiet=*/true);
      },
      testing::ExitedWithCode(EXIT_FAILURE), "");
}

TEST_F(TestProgramEnd, FailImageTest) {
  EXPECT_EXIT(
      RTNAME(FailImageStatement)(), testing::ExitedWithCode(EXIT_FAILURE), "");
}

TEST_F(TestProgramEnd, ExitTest) {
  EXPECT_EXIT(RTNAME(Exit)(), testing::ExitedWithCode(EXIT_SUCCESS), "");
  EXPECT_EXIT(
      RTNAME(Exit)(EXIT_FAILURE), testing::ExitedWithCode(EXIT_FAILURE), "");
}

TEST_F(TestProgramEnd, AbortTest) { EXPECT_DEATH(RTNAME(Abort)(), ""); }

TEST_F(TestProgramEnd, CrashTest) {
  static const std::string crashMessage{"bad user code"};
  static const std::string fileName{"file name"};
  // CrashHandlerFixture installs a custom crash handler that formats messages
  // as: "Test <name> crashed in file <file>(<line>): <message>"
  static const std::string fullMessage{"Test CrashTest crashed in file " +
      fileName + "\\(343\\): " + crashMessage};
  EXPECT_DEATH(
      RTNAME(ReportFatalUserError)(crashMessage.c_str(), fileName.c_str(), 343),
      fullMessage.c_str());
}