1//===- llvm/unittest/Support/CommandLineTest.cpp - CommandLine tests ------===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9
10#include "llvm/Support/CommandLine.h"
11#include "llvm/Config/config.h"
12
13#include "gtest/gtest.h"
14
15#include <string>
16#include <stdlib.h>
17
18using namespace llvm;
19
20namespace {
21
22class TempEnvVar {
23 public:
24  TempEnvVar(const char *name, const char *value)
25      : name(name) {
26    const char *old_value = getenv(name);
27    EXPECT_EQ(NULL, old_value) << old_value;
28#if HAVE_SETENV
29    setenv(name, value, true);
30#else
31#   define SKIP_ENVIRONMENT_TESTS
32#endif
33  }
34
35  ~TempEnvVar() {
36#if HAVE_SETENV
37    // Assume setenv and unsetenv come together.
38    unsetenv(name);
39#endif
40  }
41
42 private:
43  const char *const name;
44};
45
46#ifndef SKIP_ENVIRONMENT_TESTS
47
48const char test_env_var[] = "LLVM_TEST_COMMAND_LINE_FLAGS";
49
50cl::opt<std::string> EnvironmentTestOption("env-test-opt");
51TEST(CommandLineTest, ParseEnvironment) {
52  TempEnvVar TEV(test_env_var, "-env-test-opt=hello");
53  EXPECT_EQ("", EnvironmentTestOption);
54  cl::ParseEnvironmentOptions("CommandLineTest", test_env_var);
55  EXPECT_EQ("hello", EnvironmentTestOption);
56}
57
58// This test used to make valgrind complain
59// ("Conditional jump or move depends on uninitialised value(s)")
60TEST(CommandLineTest, ParseEnvironmentToLocalVar) {
61  // Put cl::opt on stack to check for proper initialization of fields.
62  cl::opt<std::string> EnvironmentTestOptionLocal("env-test-opt-local");
63  TempEnvVar TEV(test_env_var, "-env-test-opt-local=hello-local");
64  EXPECT_EQ("", EnvironmentTestOptionLocal);
65  cl::ParseEnvironmentOptions("CommandLineTest", test_env_var);
66  EXPECT_EQ("hello-local", EnvironmentTestOptionLocal);
67}
68
69#endif  // SKIP_ENVIRONMENT_TESTS
70
71}  // anonymous namespace
72