unittests/Support/ProcessTest.cpp

   1 //===- unittest/Support/ProcessTest.cpp -----------------------------------===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 #include "llvm/Support/Process.h"
  10 #include "gtest/gtest.h"
  11
  12 #ifdef _WIN32
  13 #include <windows.h>
  14 #endif
  15
  16 namespace {
  17
  18 using namespace llvm;
  19 using namespace sys;
  20
  21 TEST(ProcessTest, GetRandomNumberTest) {
  22   const unsigned r1 = Process::GetRandomNumber();
  23   const unsigned r2 = Process::GetRandomNumber();
  24   // It should be extremely unlikely that both r1 and r2 are 0.
  25   EXPECT_NE((r1 | r2), 0u);
  26 }
  27
  28 #ifdef _MSC_VER
  29 #define setenv(name, var, ignore) _putenv_s(name, var)
  30 #endif
  31
  32 #if HAVE_SETENV || _MSC_VER
  33 TEST(ProcessTest, Basic) {
  34   setenv("__LLVM_TEST_ENVIRON_VAR__", "abc", true);
  35   Optional<std::string> val(Process::GetEnv("__LLVM_TEST_ENVIRON_VAR__"));
  36   EXPECT_TRUE(val.hasValue());
  37   EXPECT_STREQ("abc", val->c_str());
  38 }
  39
  40 TEST(ProcessTest, None) {
  41   Optional<std::string> val(
  42       Process::GetEnv("__LLVM_TEST_ENVIRON_NO_SUCH_VAR__"));
  43   EXPECT_FALSE(val.hasValue());
  44 }
  45 #endif
  46
  47 #ifdef _WIN32
  48
  49 TEST(ProcessTest, EmptyVal) {
  50   SetEnvironmentVariableA("__LLVM_TEST_ENVIRON_VAR__", "");
  51   Optional<std::string> val(Process::GetEnv("__LLVM_TEST_ENVIRON_VAR__"));
  52   EXPECT_TRUE(val.hasValue());
  53   EXPECT_STREQ("", val->c_str());
  54 }
  55
  56 TEST(ProcessTest, Wchar) {
  57   SetEnvironmentVariableW(L"__LLVM_TEST_ENVIRON_VAR__", L"abcdefghijklmnopqrs");
  58   Optional<std::string> val(Process::GetEnv("__LLVM_TEST_ENVIRON_VAR__"));
  59   EXPECT_TRUE(val.hasValue());
  60   EXPECT_STREQ("abcdefghijklmnopqrs", val->c_str());
  61 }
  62 #endif
  63
  64 } // end anonymous namespace