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tile/third_party/gflags/test/gflags_unittest.cc
tqcq 8a2269814d init repo.
2024-06-11 19:13:30 +08:00

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// Copyright (c) 2005, Google Inc.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
// ---
//
// For now, this unit test does not cover all features of
// gflags.cc
#include <gflags/gflags.h>
#include "config.h"
#include "util.h"
#include <math.h> // for isinf() and isnan()
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#ifdef HAVE_UNISTD_H
# include <unistd.h> // for unlink()
#endif
#include <vector>
#include <string>
TEST_INIT
EXPECT_DEATH_INIT
// I don't actually use this header file, but #include it under the
// old location to make sure that the include-header-forwarding
// works. But don't bother on windows; the windows port is so new
// it never had the old location-names.
#ifndef _MSC_VER
#include <gflags/gflags_completions.h>
void (*unused_fn)() = &GFLAGS_NAMESPACE::HandleCommandLineCompletions;
#endif
using std::string;
using std::vector;
using GFLAGS_NAMESPACE::int32;
using GFLAGS_NAMESPACE::FlagRegisterer;
using GFLAGS_NAMESPACE::StringFromEnv;
using GFLAGS_NAMESPACE::RegisterFlagValidator;
using GFLAGS_NAMESPACE::CommandLineFlagInfo;
using GFLAGS_NAMESPACE::GetAllFlags;
DEFINE_string(test_tmpdir, "", "Dir we use for temp files");
DEFINE_string(srcdir, StringFromEnv("SRCDIR", "."), "Source-dir root, needed to find gflags_unittest_flagfile");
DECLARE_string(tryfromenv); // in gflags.cc
DEFINE_bool(test_bool, false, "tests bool-ness");
DEFINE_int32(test_int32, -1, "");
DEFINE_int64(test_int64, -2, "");
DEFINE_uint32(test_uint32, 1, "");
DEFINE_uint64(test_uint64, 2, "");
DEFINE_double(test_double, -1.0, "");
DEFINE_string(test_string, "initial", "");
//
// The below ugliness gets some additional code coverage in the -helpxml
// and -helpmatch test cases having to do with string lengths and formatting
//
DEFINE_bool(test_bool_with_quite_quite_quite_quite_quite_quite_quite_quite_quite_quite_quite_quite_quite_quite_long_name,
false,
"extremely_extremely_extremely_extremely_extremely_extremely_extremely_extremely_long_meaning");
DEFINE_string(test_str1, "initial", "");
DEFINE_string(test_str2, "initial", "");
DEFINE_string(test_str3, "initial", "");
// This is used to test setting tryfromenv manually
DEFINE_string(test_tryfromenv, "initial", "");
// Don't try this at home!
static int changeable_var = 12;
DEFINE_int32(changeable_var, ++changeable_var, "");
static int changeable_bool_var = 8008;
DEFINE_bool(changeable_bool_var, ++changeable_bool_var == 8009, "");
static int changeable_string_var = 0;
static string ChangeableString() {
char r[] = {static_cast<char>('0' + ++changeable_string_var), '\0'};
return r;
}
DEFINE_string(changeable_string_var, ChangeableString(), "");
// These are never used in this unittest, but can be used by
// gflags_unittest.sh when it needs to specify flags
// that are legal for gflags_unittest but don't need to
// be a particular value.
DEFINE_bool(unused_bool, true, "unused bool-ness");
DEFINE_int32(unused_int32, -1001, "");
DEFINE_int64(unused_int64, -2001, "");
DEFINE_uint32(unused_uint32, 1000, "");
DEFINE_uint64(unused_uint64, 2000, "");
DEFINE_double(unused_double, -1000.0, "");
DEFINE_string(unused_string, "unused", "");
// These flags are used by gflags_unittest.sh
DEFINE_bool(changed_bool1, false, "changed");
DEFINE_bool(changed_bool2, false, "changed");
DEFINE_bool(long_helpstring, false,
"This helpstring goes on forever and ever and ever and ever and "
"ever and ever and ever and ever and ever and ever and ever and "
"ever and ever and ever and ever and ever and ever and ever and "
"ever and ever and ever and ever and ever and ever and ever and "
"ever and ever and ever and ever and ever and ever and ever and "
"ever and ever and ever and ever and ever and ever and ever and "
"ever and ever and ever and ever and ever and ever and ever and "
"ever and ever and ever and ever and ever and ever and ever and "
"ever and ever and ever and ever and ever and ever and ever and "
"ever and ever and ever and ever and ever and ever and ever and "
"ever. This is the end of a long helpstring");
static bool AlwaysFail(const char* flag, bool value) { return value == false; }
DEFINE_bool(always_fail, false, "will fail to validate when you set it");
DEFINE_validator(always_fail, AlwaysFail);
// See the comment by GetAllFlags in gflags.h
static bool DeadlockIfCantLockInValidators(const char* flag, bool value) {
if (!value) {
return true;
}
vector<CommandLineFlagInfo> dummy;
GetAllFlags(&dummy);
return true;
}
DEFINE_bool(deadlock_if_cant_lock,
false,
"will deadlock if set to true and "
"if locking of registry in validators fails.");
DEFINE_validator(deadlock_if_cant_lock, DeadlockIfCantLockInValidators);
#define MAKEFLAG(x) DEFINE_int32(test_flag_num##x, x, "Test flag")
// Define 10 flags
#define MAKEFLAG10(x) \
MAKEFLAG(x##0); \
MAKEFLAG(x##1); \
MAKEFLAG(x##2); \
MAKEFLAG(x##3); \
MAKEFLAG(x##4); \
MAKEFLAG(x##5); \
MAKEFLAG(x##6); \
MAKEFLAG(x##7); \
MAKEFLAG(x##8); \
MAKEFLAG(x##9)
// Define 100 flags
#define MAKEFLAG100(x) \
MAKEFLAG10(x##0); \
MAKEFLAG10(x##1); \
MAKEFLAG10(x##2); \
MAKEFLAG10(x##3); \
MAKEFLAG10(x##4); \
MAKEFLAG10(x##5); \
MAKEFLAG10(x##6); \
MAKEFLAG10(x##7); \
MAKEFLAG10(x##8); \
MAKEFLAG10(x##9)
// Define a bunch of command-line flags. Each occurrence of the MAKEFLAG100
// macro defines 100 integer flags. This lets us test the effect of having
// many flags on startup time.
MAKEFLAG100(1);
MAKEFLAG100(2);
MAKEFLAG100(3);
MAKEFLAG100(4);
MAKEFLAG100(5);
MAKEFLAG100(6);
MAKEFLAG100(7);
MAKEFLAG100(8);
MAKEFLAG100(9);
MAKEFLAG100(10);
MAKEFLAG100(11);
MAKEFLAG100(12);
MAKEFLAG100(13);
MAKEFLAG100(14);
MAKEFLAG100(15);
#undef MAKEFLAG100
#undef MAKEFLAG10
#undef MAKEFLAG
// This is a pseudo-flag -- we want to register a flag with a filename
// at the top level, but there is no way to do this except by faking
// the filename.
namespace fLI {
static const int32 FLAGS_nonotldflag1 = 12;
int32 FLAGS_tldflag1 = FLAGS_nonotldflag1;
int32 FLAGS_notldflag1 = FLAGS_nonotldflag1;
static FlagRegisterer o_tldflag1(
"tldflag1",
"should show up in --helpshort", "gflags_unittest.cc",
&FLAGS_tldflag1, &FLAGS_notldflag1);
}
using fLI::FLAGS_tldflag1;
namespace fLI {
static const int32 FLAGS_nonotldflag2 = 23;
int32 FLAGS_tldflag2 = FLAGS_nonotldflag2;
int32 FLAGS_notldflag2 = FLAGS_nonotldflag2;
static FlagRegisterer o_tldflag2(
"tldflag2",
"should show up in --helpshort", "gflags_unittest.",
&FLAGS_tldflag2, &FLAGS_notldflag2);
}
using fLI::FLAGS_tldflag2;
namespace GFLAGS_NAMESPACE {
namespace {
static string TmpFile(const string& basename) {
#ifdef _MSC_VER
return FLAGS_test_tmpdir + "\\" + basename;
#else
return FLAGS_test_tmpdir + "/" + basename;
#endif
}
// Returns the definition of the --flagfile flag to be used in the tests.
// Must be called after ParseCommandLineFlags().
static const char* GetFlagFileFlag() {
#ifdef _MSC_VER
static const string flagfile = FLAGS_srcdir + "\\gflags_unittest_flagfile";
#else
static const string flagfile = FLAGS_srcdir + "/gflags_unittest_flagfile";
#endif
static const string flagfile_flag = string("--flagfile=") + flagfile;
return flagfile_flag.c_str();
}
// Defining a variable of type CompileAssertTypesEqual<T1, T2> will cause a
// compiler error iff T1 and T2 are different types.
template <typename T1, typename T2>
struct CompileAssertTypesEqual;
template <typename T>
struct CompileAssertTypesEqual<T, T> {
};
template <typename Expected, typename Actual>
void AssertIsType(Actual& x) {
CompileAssertTypesEqual<Expected, Actual>();
}
// Verify all the flags are the right type.
TEST(FlagTypes, FlagTypes) {
AssertIsType<bool>(FLAGS_test_bool);
AssertIsType<int32>(FLAGS_test_int32);
AssertIsType<int64>(FLAGS_test_int64);
AssertIsType<uint32>(FLAGS_test_uint32);
AssertIsType<uint64>(FLAGS_test_uint64);
AssertIsType<double>(FLAGS_test_double);
AssertIsType<string>(FLAGS_test_string);
}
#ifdef GTEST_HAS_DEATH_TEST
// Death tests for "help" options.
//
// The help system automatically calls gflags_exitfunc(1) when you specify any of
// the help-related flags ("-helpmatch", "-helpxml") so we can't test
// those mainline.
// Tests that "-helpmatch" causes the process to die.
TEST(ReadFlagsFromStringDeathTest, HelpMatch) {
EXPECT_DEATH(ReadFlagsFromString("-helpmatch=base", GetArgv0(), true),
"");
}
// Tests that "-helpxml" causes the process to die.
TEST(ReadFlagsFromStringDeathTest, HelpXml) {
EXPECT_DEATH(ReadFlagsFromString("-helpxml", GetArgv0(), true),
"");
}
#endif
// A subroutine needed for testing reading flags from a string.
void TestFlagString(const string& flags,
const string& expected_string,
bool expected_bool,
int32 expected_int32,
double expected_double) {
EXPECT_TRUE(ReadFlagsFromString(flags,
GetArgv0(),
// errors are fatal
true));
EXPECT_EQ(expected_string, FLAGS_test_string);
EXPECT_EQ(expected_bool, FLAGS_test_bool);
EXPECT_EQ(expected_int32, FLAGS_test_int32);
EXPECT_DOUBLE_EQ(expected_double, FLAGS_test_double);
}
// Tests reading flags from a string.
TEST(FlagFileTest, ReadFlagsFromString) {
TestFlagString(
// Flag string
"-test_string=continued\n"
"# some comments are in order\n"
"# some\n"
" # comments\n"
"#are\n"
" #trickier\n"
"# than others\n"
"-test_bool=true\n"
" -test_int32=1\n"
"-test_double=0.0\n",
// Expected values
"continued",
true,
1,
0.0);
TestFlagString(
// Flag string
"# let's make sure it can update values\n"
"-test_string=initial\n"
"-test_bool=false\n"
"-test_int32=123\n"
"-test_double=123.0\n",
// Expected values
"initial",
false,
123,
123.0);
// Test that flags can use dashes instead of underscores.
TestFlagString(
// Flag string
"-test-string=initial\n"
"--test-bool=false\n"
"--test-int32=123\n"
"--test-double=123.0\n",
// Expected values
"initial",
false,
123,
123.0);
}
// Tests the filename part of the flagfile
TEST(FlagFileTest, FilenamesOurfileLast) {
FLAGS_test_string = "initial";
FLAGS_test_bool = false;
FLAGS_test_int32 = -1;
FLAGS_test_double = -1.0;
TestFlagString(
// Flag string
"-test_string=continued\n"
"# some comments are in order\n"
"# some\n"
" # comments\n"
"#are\n"
" #trickier\n"
"# than others\n"
"not_our_filename\n"
"-test_bool=true\n"
" -test_int32=1\n"
"gflags_unittest\n"
"-test_double=1000.0\n",
// Expected values
"continued",
false,
-1,
1000.0);
}
TEST(FlagFileTest, FilenamesOurfileFirst) {
FLAGS_test_string = "initial";
FLAGS_test_bool = false;
FLAGS_test_int32 = -1;
FLAGS_test_double = -1.0;
TestFlagString(
// Flag string
"-test_string=continued\n"
"# some comments are in order\n"
"# some\n"
" # comments\n"
"#are\n"
" #trickier\n"
"# than others\n"
"gflags_unittest\n"
"-test_bool=true\n"
" -test_int32=1\n"
"not_our_filename\n"
"-test_double=1000.0\n",
// Expected values
"continued",
true,
1,
-1.0);
}
#if defined(HAVE_FNMATCH_H) || defined(HAVE_SHLWAPI_H) // otherwise glob isn't supported
TEST(FlagFileTest, FilenamesOurfileGlob) {
FLAGS_test_string = "initial";
FLAGS_test_bool = false;
FLAGS_test_int32 = -1;
FLAGS_test_double = -1.0;
TestFlagString(
// Flag string
"-test_string=continued\n"
"# some comments are in order\n"
"# some\n"
" # comments\n"
"#are\n"
" #trickier\n"
"# than others\n"
"*flags*\n"
"-test_bool=true\n"
" -test_int32=1\n"
"flags\n"
"-test_double=1000.0\n",
// Expected values
"continued",
true,
1,
-1.0);
}
TEST(FlagFileTest, FilenamesOurfileInBigList) {
FLAGS_test_string = "initial";
FLAGS_test_bool = false;
FLAGS_test_int32 = -1;
FLAGS_test_double = -1.0;
TestFlagString(
// Flag string
"-test_string=continued\n"
"# some comments are in order\n"
"# some\n"
" # comments\n"
"#are\n"
" #trickier\n"
"# than others\n"
"*first* *flags* *third*\n"
"-test_bool=true\n"
" -test_int32=1\n"
"flags\n"
"-test_double=1000.0\n",
// Expected values
"continued",
true,
1,
-1.0);
}
#endif // defined(HAVE_FNMATCH_H) || defined(HAVE_SHLWAPI_H)
// Tests that a failed flag-from-string read keeps flags at default values
TEST(FlagFileTest, FailReadFlagsFromString) {
FLAGS_test_int32 = 119;
string flags("# let's make sure it can update values\n"
"-test_string=non_initial\n"
"-test_bool=false\n"
"-test_int32=123\n"
"-test_double=illegal\n");
EXPECT_FALSE(ReadFlagsFromString(flags,
GetArgv0(),
// errors are fatal
false));
EXPECT_EQ(119, FLAGS_test_int32);
EXPECT_EQ("initial", FLAGS_test_string);
}
// Tests that flags can be set to ordinary values.
TEST(SetFlagValueTest, OrdinaryValues) {
EXPECT_EQ("initial", FLAGS_test_str1);
SetCommandLineOptionWithMode("test_str1", "second", SET_FLAG_IF_DEFAULT);
EXPECT_EQ("second", FLAGS_test_str1); // set; was default
SetCommandLineOptionWithMode("test_str1", "third", SET_FLAG_IF_DEFAULT);
EXPECT_EQ("second", FLAGS_test_str1); // already set once
FLAGS_test_str1 = "initial";
SetCommandLineOptionWithMode("test_str1", "third", SET_FLAG_IF_DEFAULT);
EXPECT_EQ("initial", FLAGS_test_str1); // still already set before
SetCommandLineOptionWithMode("test_str1", "third", SET_FLAGS_VALUE);
EXPECT_EQ("third", FLAGS_test_str1); // changed value
SetCommandLineOptionWithMode("test_str1", "fourth", SET_FLAGS_DEFAULT);
EXPECT_EQ("third", FLAGS_test_str1);
// value not changed (already set before)
EXPECT_EQ("initial", FLAGS_test_str2);
SetCommandLineOptionWithMode("test_str2", "second", SET_FLAGS_DEFAULT);
EXPECT_EQ("second", FLAGS_test_str2); // changed (was default)
FLAGS_test_str2 = "extra";
EXPECT_EQ("extra", FLAGS_test_str2);
FLAGS_test_str2 = "second";
SetCommandLineOptionWithMode("test_str2", "third", SET_FLAGS_DEFAULT);
EXPECT_EQ("third", FLAGS_test_str2); // still changed (was equal to default)
SetCommandLineOptionWithMode("test_str2", "fourth", SET_FLAG_IF_DEFAULT);
EXPECT_EQ("fourth", FLAGS_test_str2); // changed (was default)
EXPECT_EQ("initial", FLAGS_test_str3);
SetCommandLineOptionWithMode("test_str3", "second", SET_FLAGS_DEFAULT);
EXPECT_EQ("second", FLAGS_test_str3); // changed
FLAGS_test_str3 = "third";
SetCommandLineOptionWithMode("test_str3", "fourth", SET_FLAGS_DEFAULT);
EXPECT_EQ("third", FLAGS_test_str3); // not changed (was set)
SetCommandLineOptionWithMode("test_str3", "fourth", SET_FLAG_IF_DEFAULT);
EXPECT_EQ("third", FLAGS_test_str3); // not changed (was set)
SetCommandLineOptionWithMode("test_str3", "fourth", SET_FLAGS_VALUE);
EXPECT_EQ("fourth", FLAGS_test_str3); // changed value
}
// Tests that flags can be set to exceptional values.
// Note: apparently MINGW doesn't parse inf and nan correctly:
// http://www.mail-archive.com/bug-gnulib@gnu.org/msg09573.html
// This url says FreeBSD also has a problem, but I didn't see that.
TEST(SetFlagValueTest, ExceptionalValues) {
#if defined(isinf) && !defined(__MINGW32__)
EXPECT_EQ("test_double set to inf\n",
SetCommandLineOption("test_double", "inf"));
EXPECT_INF(FLAGS_test_double);
EXPECT_EQ("test_double set to inf\n",
SetCommandLineOption("test_double", "INF"));
EXPECT_INF(FLAGS_test_double);
#endif
// set some bad values
EXPECT_EQ("",
SetCommandLineOption("test_double", "0.1xxx"));
EXPECT_EQ("",
SetCommandLineOption("test_double", " "));
EXPECT_EQ("",
SetCommandLineOption("test_double", ""));
#if defined(isinf) && !defined(__MINGW32__)
EXPECT_EQ("test_double set to -inf\n",
SetCommandLineOption("test_double", "-inf"));
EXPECT_INF(FLAGS_test_double);
EXPECT_GT(0, FLAGS_test_double);
#endif
#if defined(isnan) && !defined(__MINGW32__)
EXPECT_EQ("test_double set to nan\n",
SetCommandLineOption("test_double", "NaN"));
EXPECT_NAN(FLAGS_test_double);
#endif
}
// Tests that integer flags can be specified in many ways
TEST(SetFlagValueTest, DifferentRadices) {
EXPECT_EQ("test_int32 set to 12\n",
SetCommandLineOption("test_int32", "12"));
EXPECT_EQ("test_int32 set to 16\n",
SetCommandLineOption("test_int32", "0x10"));
EXPECT_EQ("test_int32 set to 34\n",
SetCommandLineOption("test_int32", "0X22"));
// Leading 0 is *not* octal; it's still decimal
EXPECT_EQ("test_int32 set to 10\n",
SetCommandLineOption("test_int32", "010"));
}
// Tests what happens when you try to set a flag to an illegal value
TEST(SetFlagValueTest, IllegalValues) {
FLAGS_test_bool = true;
FLAGS_test_int32 = 119;
FLAGS_test_int64 = 1191;
FLAGS_test_uint32 = 11911;
FLAGS_test_uint64 = 119111;
EXPECT_EQ("",
SetCommandLineOption("test_bool", "12"));
EXPECT_EQ("",
SetCommandLineOption("test_uint32", "-1970"));
EXPECT_EQ("",
SetCommandLineOption("test_int32", "7000000000000"));
EXPECT_EQ("",
SetCommandLineOption("test_uint64", "-1"));
EXPECT_EQ("",
SetCommandLineOption("test_int64", "not a number!"));
// Test the empty string with each type of input
EXPECT_EQ("", SetCommandLineOption("test_bool", ""));
EXPECT_EQ("", SetCommandLineOption("test_int32", ""));
EXPECT_EQ("", SetCommandLineOption("test_int64", ""));
EXPECT_EQ("", SetCommandLineOption("test_uint32", ""));
EXPECT_EQ("", SetCommandLineOption("test_uint64", ""));
EXPECT_EQ("", SetCommandLineOption("test_double", ""));
EXPECT_EQ("test_string set to \n", SetCommandLineOption("test_string", ""));
EXPECT_TRUE(FLAGS_test_bool);
EXPECT_EQ(119, FLAGS_test_int32);
EXPECT_EQ(1191, FLAGS_test_int64);
EXPECT_EQ(11911, FLAGS_test_uint32);
EXPECT_EQ(119111, FLAGS_test_uint64);
}
// Tests that we only evaluate macro args once
TEST(MacroArgs, EvaluateOnce) {
EXPECT_EQ(13, FLAGS_changeable_var);
// Make sure we don't ++ the value somehow, when evaluating the flag.
EXPECT_EQ(13, FLAGS_changeable_var);
// Make sure the macro only evaluated this var once.
EXPECT_EQ(13, changeable_var);
// Make sure the actual value and default value are the same
SetCommandLineOptionWithMode("changeable_var", "21", SET_FLAG_IF_DEFAULT);
EXPECT_EQ(21, FLAGS_changeable_var);
}
TEST(MacroArgs, EvaluateOnceBool) {
EXPECT_TRUE(FLAGS_changeable_bool_var);
EXPECT_TRUE(FLAGS_changeable_bool_var);
EXPECT_EQ(8009, changeable_bool_var);
SetCommandLineOptionWithMode("changeable_bool_var", "false",
SET_FLAG_IF_DEFAULT);
EXPECT_FALSE(FLAGS_changeable_bool_var);
}
TEST(MacroArgs, EvaluateOnceStrings) {
EXPECT_EQ("1", FLAGS_changeable_string_var);
EXPECT_EQ("1", FLAGS_changeable_string_var);
EXPECT_EQ(1, changeable_string_var);
SetCommandLineOptionWithMode("changeable_string_var", "different",
SET_FLAG_IF_DEFAULT);
EXPECT_EQ("different", FLAGS_changeable_string_var);
}
// Tests that the FooFromEnv does the right thing
TEST(FromEnvTest, LegalValues) {
setenv("BOOL_VAL1", "true", 1);
setenv("BOOL_VAL2", "false", 1);
setenv("BOOL_VAL3", "1", 1);
setenv("BOOL_VAL4", "F", 1);
EXPECT_TRUE(BoolFromEnv("BOOL_VAL1", false));
EXPECT_FALSE(BoolFromEnv("BOOL_VAL2", true));
EXPECT_TRUE(BoolFromEnv("BOOL_VAL3", false));
EXPECT_FALSE(BoolFromEnv("BOOL_VAL4", true));
EXPECT_TRUE(BoolFromEnv("BOOL_VAL_UNKNOWN", true));
EXPECT_FALSE(BoolFromEnv("BOOL_VAL_UNKNOWN", false));
setenv("INT_VAL1", "1", 1);
setenv("INT_VAL2", "-1", 1);
EXPECT_EQ(1, Int32FromEnv("INT_VAL1", 10));
EXPECT_EQ(-1, Int32FromEnv("INT_VAL2", 10));
EXPECT_EQ(10, Int32FromEnv("INT_VAL_UNKNOWN", 10));
setenv("INT_VAL3", "4294967295", 1);
EXPECT_EQ(1, Uint32FromEnv("INT_VAL1", 10));
EXPECT_EQ(4294967295L, Uint32FromEnv("INT_VAL3", 30));
EXPECT_EQ(10, Uint32FromEnv("INT_VAL_UNKNOWN", 10));
setenv("INT_VAL4", "1099511627776", 1);
EXPECT_EQ(1, Int64FromEnv("INT_VAL1", 20));
EXPECT_EQ(-1, Int64FromEnv("INT_VAL2", 20));
EXPECT_EQ(1099511627776LL, Int64FromEnv("INT_VAL4", 20));
EXPECT_EQ(20, Int64FromEnv("INT_VAL_UNKNOWN", 20));
EXPECT_EQ(1, Uint64FromEnv("INT_VAL1", 30));
EXPECT_EQ(1099511627776ULL, Uint64FromEnv("INT_VAL4", 30));
EXPECT_EQ(30, Uint64FromEnv("INT_VAL_UNKNOWN", 30));
// I pick values here that can be easily represented exactly in floating-point
setenv("DOUBLE_VAL1", "0.0", 1);
setenv("DOUBLE_VAL2", "1.0", 1);
setenv("DOUBLE_VAL3", "-1.0", 1);
EXPECT_EQ(0.0, DoubleFromEnv("DOUBLE_VAL1", 40.0));
EXPECT_EQ(1.0, DoubleFromEnv("DOUBLE_VAL2", 40.0));
EXPECT_EQ(-1.0, DoubleFromEnv("DOUBLE_VAL3", 40.0));
EXPECT_EQ(40.0, DoubleFromEnv("DOUBLE_VAL_UNKNOWN", 40.0));
setenv("STRING_VAL1", "", 1);
setenv("STRING_VAL2", "my happy string!", 1);
EXPECT_STREQ("", StringFromEnv("STRING_VAL1", "unknown"));
EXPECT_STREQ("my happy string!", StringFromEnv("STRING_VAL2", "unknown"));
EXPECT_STREQ("unknown", StringFromEnv("STRING_VAL_UNKNOWN", "unknown"));
}
#ifdef GTEST_HAS_DEATH_TEST
// Tests that the FooFromEnv dies on parse-error
TEST(FromEnvDeathTest, IllegalValues) {
setenv("BOOL_BAD1", "so true!", 1);
setenv("BOOL_BAD2", "", 1);
EXPECT_DEATH(BoolFromEnv("BOOL_BAD1", false), "error parsing env variable");
EXPECT_DEATH(BoolFromEnv("BOOL_BAD2", true), "error parsing env variable");
setenv("INT_BAD1", "one", 1);
setenv("INT_BAD2", "100000000000000000", 1);
setenv("INT_BAD3", "0xx10", 1);
setenv("INT_BAD4", "", 1);
EXPECT_DEATH(Int32FromEnv("INT_BAD1", 10), "error parsing env variable");
EXPECT_DEATH(Int32FromEnv("INT_BAD2", 10), "error parsing env variable");
EXPECT_DEATH(Int32FromEnv("INT_BAD3", 10), "error parsing env variable");
EXPECT_DEATH(Int32FromEnv("INT_BAD4", 10), "error parsing env variable");
EXPECT_DEATH(Uint32FromEnv("INT_BAD1", 10), "error parsing env variable");
EXPECT_DEATH(Uint32FromEnv("INT_BAD2", 10), "error parsing env variable");
EXPECT_DEATH(Uint32FromEnv("INT_BAD3", 10), "error parsing env variable");
EXPECT_DEATH(Uint32FromEnv("INT_BAD4", 10), "error parsing env variable");
setenv("BIGINT_BAD1", "18446744073709551616000", 1);
EXPECT_DEATH(Int64FromEnv("INT_BAD1", 20), "error parsing env variable");
EXPECT_DEATH(Int64FromEnv("INT_BAD3", 20), "error parsing env variable");
EXPECT_DEATH(Int64FromEnv("INT_BAD4", 20), "error parsing env variable");
EXPECT_DEATH(Int64FromEnv("BIGINT_BAD1", 200), "error parsing env variable");
setenv("BIGINT_BAD2", "-1", 1);
EXPECT_DEATH(Uint64FromEnv("INT_BAD1", 30), "error parsing env variable");
EXPECT_DEATH(Uint64FromEnv("INT_BAD3", 30), "error parsing env variable");
EXPECT_DEATH(Uint64FromEnv("INT_BAD4", 30), "error parsing env variable");
EXPECT_DEATH(Uint64FromEnv("BIGINT_BAD1", 30), "error parsing env variable");
// TODO(csilvers): uncomment this when we disallow negative numbers for uint64
#if 0
EXPECT_DEATH(Uint64FromEnv("BIGINT_BAD2", 30), "error parsing env variable");
#endif
setenv("DOUBLE_BAD1", "0.0.0", 1);
setenv("DOUBLE_BAD2", "", 1);
EXPECT_DEATH(DoubleFromEnv("DOUBLE_BAD1", 40.0), "error parsing env variable");
EXPECT_DEATH(DoubleFromEnv("DOUBLE_BAD2", 40.0), "error parsing env variable");
}
#endif
// Tests that FlagSaver can save the states of string flags.
TEST(FlagSaverTest, CanSaveStringFlagStates) {
// 1. Initializes the flags.
// State of flag test_str1:
// default value - "initial"
// current value - "initial"
// not set - true
SetCommandLineOptionWithMode("test_str2", "second", SET_FLAGS_VALUE);
// State of flag test_str2:
// default value - "initial"
// current value - "second"
// not set - false
SetCommandLineOptionWithMode("test_str3", "second", SET_FLAGS_DEFAULT);
// State of flag test_str3:
// default value - "second"
// current value - "second"
// not set - true
// 2. Saves the flag states.
{
FlagSaver fs;
// 3. Modifies the flag states.
SetCommandLineOptionWithMode("test_str1", "second", SET_FLAGS_VALUE);
EXPECT_EQ("second", FLAGS_test_str1);
// State of flag test_str1:
// default value - "second"
// current value - "second"
// not set - true
SetCommandLineOptionWithMode("test_str2", "third", SET_FLAGS_DEFAULT);
EXPECT_EQ("second", FLAGS_test_str2);
// State of flag test_str2:
// default value - "third"
// current value - "second"
// not set - false
SetCommandLineOptionWithMode("test_str3", "third", SET_FLAGS_VALUE);
EXPECT_EQ("third", FLAGS_test_str3);
// State of flag test_str1:
// default value - "second"
// current value - "third"
// not set - false
// 4. Restores the flag states.
}
// 5. Verifies that the states were restored.
// Verifies that the value of test_str1 was restored.
EXPECT_EQ("initial", FLAGS_test_str1);
// Verifies that the "not set" attribute of test_str1 was restored to true.
SetCommandLineOptionWithMode("test_str1", "second", SET_FLAG_IF_DEFAULT);
EXPECT_EQ("second", FLAGS_test_str1);
// Verifies that the value of test_str2 was restored.
EXPECT_EQ("second", FLAGS_test_str2);
// Verifies that the "not set" attribute of test_str2 was restored to false.
SetCommandLineOptionWithMode("test_str2", "fourth", SET_FLAG_IF_DEFAULT);
EXPECT_EQ("second", FLAGS_test_str2);
// Verifies that the value of test_str3 was restored.
EXPECT_EQ("second", FLAGS_test_str3);
// Verifies that the "not set" attribute of test_str3 was restored to true.
SetCommandLineOptionWithMode("test_str3", "fourth", SET_FLAG_IF_DEFAULT);
EXPECT_EQ("fourth", FLAGS_test_str3);
}
// Tests that FlagSaver can save the values of various-typed flags.
TEST(FlagSaverTest, CanSaveVariousTypedFlagValues) {
// Initializes the flags.
FLAGS_test_bool = false;
FLAGS_test_int32 = -1;
FLAGS_test_uint32 = 2;
FLAGS_test_int64 = -3;
FLAGS_test_uint64 = 4;
FLAGS_test_double = 5.0;
FLAGS_test_string = "good";
// Saves the flag states.
{
FlagSaver fs;
// Modifies the flags.
FLAGS_test_bool = true;
FLAGS_test_int32 = -5;
FLAGS_test_uint32 = 6;
FLAGS_test_int64 = -7;
FLAGS_test_uint64 = 8;
FLAGS_test_double = 8.0;
FLAGS_test_string = "bad";
// Restores the flag states.
}
// Verifies the flag values were restored.
EXPECT_FALSE(FLAGS_test_bool);
EXPECT_EQ(-1, FLAGS_test_int32);
EXPECT_EQ(2, FLAGS_test_uint32);
EXPECT_EQ(-3, FLAGS_test_int64);
EXPECT_EQ(4, FLAGS_test_uint64);
EXPECT_DOUBLE_EQ(5.0, FLAGS_test_double);
EXPECT_EQ("good", FLAGS_test_string);
}
TEST(GetAllFlagsTest, BaseTest) {
vector<CommandLineFlagInfo> flags;
GetAllFlags(&flags);
bool found_test_bool = false;
vector<CommandLineFlagInfo>::const_iterator i;
for (i = flags.begin(); i != flags.end(); ++i) {
if (i->name == "test_bool") {
found_test_bool = true;
EXPECT_EQ(i->type, "bool");
EXPECT_EQ(i->default_value, "false");
EXPECT_EQ(i->flag_ptr, &FLAGS_test_bool);
break;
}
}
EXPECT_TRUE(found_test_bool);
}
TEST(ShowUsageWithFlagsTest, BaseTest) {
// TODO(csilvers): test this by allowing output other than to stdout.
// Not urgent since this functionality is tested via
// gflags_unittest.sh, though only through use of --help.
}
TEST(ShowUsageWithFlagsRestrictTest, BaseTest) {
// TODO(csilvers): test this by allowing output other than to stdout.
// Not urgent since this functionality is tested via
// gflags_unittest.sh, though only through use of --helpmatch.
}
// Note: all these argv-based tests depend on SetArgv being called
// before ParseCommandLineFlags() in main(), below.
TEST(GetArgvsTest, BaseTest) {
vector<string> argvs = GetArgvs();
EXPECT_EQ(4, argvs.size());
EXPECT_EQ("/test/argv/for/gflags_unittest", argvs[0]);
EXPECT_EQ("argv 2", argvs[1]);
EXPECT_EQ("3rd argv", argvs[2]);
EXPECT_EQ("argv #4", argvs[3]);
}
TEST(GetArgvTest, BaseTest) {
EXPECT_STREQ("/test/argv/for/gflags_unittest "
"argv 2 3rd argv argv #4", GetArgv());
}
TEST(GetArgv0Test, BaseTest) {
EXPECT_STREQ("/test/argv/for/gflags_unittest", GetArgv0());
}
TEST(GetArgvSumTest, BaseTest) {
// This number is just the sum of the ASCII values of all the chars
// in GetArgv().
EXPECT_EQ(4904, GetArgvSum());
}
TEST(ProgramInvocationNameTest, BaseTest) {
EXPECT_STREQ("/test/argv/for/gflags_unittest",
ProgramInvocationName());
}
TEST(ProgramInvocationShortNameTest, BaseTest) {
EXPECT_STREQ("gflags_unittest", ProgramInvocationShortName());
}
TEST(ProgramUsageTest, BaseTest) { // Depends on 1st arg to ParseCommandLineFlags()
EXPECT_STREQ("/test/argv/for/gflags_unittest: "
"<useless flag> [...]\nDoes something useless.\n",
ProgramUsage());
}
TEST(GetCommandLineOptionTest, NameExistsAndIsDefault) {
string value("will be changed");
bool r = GetCommandLineOption("test_bool", &value);
EXPECT_TRUE(r);
EXPECT_EQ("false", value);
r = GetCommandLineOption("test_int32", &value);
EXPECT_TRUE(r);
EXPECT_EQ("-1", value);
}
TEST(GetCommandLineOptionTest, NameExistsAndWasAssigned) {
FLAGS_test_int32 = 400;
string value("will be changed");
const bool r = GetCommandLineOption("test_int32", &value);
EXPECT_TRUE(r);
EXPECT_EQ("400", value);
}
TEST(GetCommandLineOptionTest, NameExistsAndWasSet) {
SetCommandLineOption("test_int32", "700");
string value("will be changed");
const bool r = GetCommandLineOption("test_int32", &value);
EXPECT_TRUE(r);
EXPECT_EQ("700", value);
}
TEST(GetCommandLineOptionTest, NameExistsAndWasNotSet) {
// This doesn't set the flag's value, but rather its default value.
// is_default is still true, but the 'default' value returned has changed!
SetCommandLineOptionWithMode("test_int32", "800", SET_FLAGS_DEFAULT);
string value("will be changed");
const bool r = GetCommandLineOption("test_int32", &value);
EXPECT_TRUE(r);
EXPECT_EQ("800", value);
EXPECT_TRUE(GetCommandLineFlagInfoOrDie("test_int32").is_default);
}
TEST(GetCommandLineOptionTest, NameExistsAndWasConditionallySet) {
SetCommandLineOptionWithMode("test_int32", "900", SET_FLAG_IF_DEFAULT);
string value("will be changed");
const bool r = GetCommandLineOption("test_int32", &value);
EXPECT_TRUE(r);
EXPECT_EQ("900", value);
}
TEST(GetCommandLineOptionTest, NameDoesNotExist) {
string value("will not be changed");
const bool r = GetCommandLineOption("test_int3210", &value);
EXPECT_FALSE(r);
EXPECT_EQ("will not be changed", value);
}
TEST(GetCommandLineFlagInfoTest, FlagExists) {
CommandLineFlagInfo info;
bool r = GetCommandLineFlagInfo("test_int32", &info);
EXPECT_TRUE(r);
EXPECT_EQ("test_int32", info.name);
EXPECT_EQ("int32", info.type);
EXPECT_EQ("", info.description);
EXPECT_EQ("-1", info.current_value);
EXPECT_EQ("-1", info.default_value);
EXPECT_TRUE(info.is_default);
EXPECT_FALSE(info.has_validator_fn);
EXPECT_EQ(&FLAGS_test_int32, info.flag_ptr);
FLAGS_test_bool = true;
r = GetCommandLineFlagInfo("test_bool", &info);
EXPECT_TRUE(r);
EXPECT_EQ("test_bool", info.name);
EXPECT_EQ("bool", info.type);
EXPECT_EQ("tests bool-ness", info.description);
EXPECT_EQ("true", info.current_value);
EXPECT_EQ("false", info.default_value);
EXPECT_FALSE(info.is_default);
EXPECT_FALSE(info.has_validator_fn);
EXPECT_EQ(&FLAGS_test_bool, info.flag_ptr);
FLAGS_test_bool = false;
r = GetCommandLineFlagInfo("test_bool", &info);
EXPECT_TRUE(r);
EXPECT_EQ("test_bool", info.name);
EXPECT_EQ("bool", info.type);
EXPECT_EQ("tests bool-ness", info.description);
EXPECT_EQ("false", info.current_value);
EXPECT_EQ("false", info.default_value);
EXPECT_FALSE(info.is_default); // value is same, but flag *was* modified
EXPECT_FALSE(info.has_validator_fn);
EXPECT_EQ(&FLAGS_test_bool, info.flag_ptr);
}
TEST(GetCommandLineFlagInfoTest, FlagDoesNotExist) {
CommandLineFlagInfo info;
// Set to some random values that GetCommandLineFlagInfo should not change
info.name = "name";
info.type = "type";
info.current_value = "curr";
info.default_value = "def";
info.filename = "/";
info.is_default = false;
info.has_validator_fn = true;
info.flag_ptr = NULL;
bool r = GetCommandLineFlagInfo("test_int3210", &info);
EXPECT_FALSE(r);
EXPECT_EQ("name", info.name);
EXPECT_EQ("type", info.type);
EXPECT_EQ("", info.description);
EXPECT_EQ("curr", info.current_value);
EXPECT_EQ("def", info.default_value);
EXPECT_EQ("/", info.filename);
EXPECT_FALSE(info.is_default);
EXPECT_TRUE(info.has_validator_fn);
EXPECT_EQ(NULL, info.flag_ptr);
}
TEST(GetCommandLineFlagInfoOrDieTest, FlagExistsAndIsDefault) {
CommandLineFlagInfo info;
info = GetCommandLineFlagInfoOrDie("test_int32");
EXPECT_EQ("test_int32", info.name);
EXPECT_EQ("int32", info.type);
EXPECT_EQ("", info.description);
EXPECT_EQ("-1", info.current_value);
EXPECT_EQ("-1", info.default_value);
EXPECT_TRUE(info.is_default);
EXPECT_EQ(&FLAGS_test_int32, info.flag_ptr);
info = GetCommandLineFlagInfoOrDie("test_bool");
EXPECT_EQ("test_bool", info.name);
EXPECT_EQ("bool", info.type);
EXPECT_EQ("tests bool-ness", info.description);
EXPECT_EQ("false", info.current_value);
EXPECT_EQ("false", info.default_value);
EXPECT_TRUE(info.is_default);
EXPECT_FALSE(info.has_validator_fn);
EXPECT_EQ(&FLAGS_test_bool, info.flag_ptr);
}
TEST(GetCommandLineFlagInfoOrDieTest, FlagExistsAndWasAssigned) {
FLAGS_test_int32 = 400;
CommandLineFlagInfo info;
info = GetCommandLineFlagInfoOrDie("test_int32");
EXPECT_EQ("test_int32", info.name);
EXPECT_EQ("int32", info.type);
EXPECT_EQ("", info.description);
EXPECT_EQ("400", info.current_value);
EXPECT_EQ("-1", info.default_value);
EXPECT_FALSE(info.is_default);
EXPECT_EQ(&FLAGS_test_int32, info.flag_ptr);
FLAGS_test_bool = true;
info = GetCommandLineFlagInfoOrDie("test_bool");
EXPECT_EQ("test_bool", info.name);
EXPECT_EQ("bool", info.type);
EXPECT_EQ("tests bool-ness", info.description);
EXPECT_EQ("true", info.current_value);
EXPECT_EQ("false", info.default_value);
EXPECT_FALSE(info.is_default);
EXPECT_FALSE(info.has_validator_fn);
EXPECT_EQ(&FLAGS_test_bool, info.flag_ptr);
}
#ifdef GTEST_HAS_DEATH_TEST
TEST(GetCommandLineFlagInfoOrDieDeathTest, FlagDoesNotExist) {
EXPECT_DEATH(GetCommandLineFlagInfoOrDie("test_int3210"),
".*: flag test_int3210 does not exist");
}
#endif
// These are lightly tested because they're deprecated. Basically,
// the tests are meant to cover how existing users use these functions,
// but not necessarily how new users could use them.
TEST(DeprecatedFunctionsTest, CommandlineFlagsIntoString) {
string s = CommandlineFlagsIntoString();
EXPECT_NE(string::npos, s.find("--test_bool="));
}
TEST(DeprecatedFunctionsTest, AppendFlagsIntoFile) {
FLAGS_test_int32 = 10; // just to make the test more interesting
string filename(TmpFile("flagfile"));
unlink(filename.c_str()); // just to be safe
const bool r = AppendFlagsIntoFile(filename, "not the real argv0");
EXPECT_TRUE(r);
FILE* fp;
EXPECT_EQ(0, SafeFOpen(&fp, filename.c_str(), "r"));
EXPECT_TRUE(fp != NULL);
char line[8192];
EXPECT_TRUE(fgets(line, sizeof(line)-1, fp) != NULL); // get the first line
// First line should be progname.
EXPECT_STREQ("not the real argv0\n", line);
bool found_bool = false, found_int32 = false;
while (fgets(line, sizeof(line)-1, fp)) {
line[sizeof(line)-1] = '\0'; // just to be safe
if (strcmp(line, "--test_bool=false\n") == 0)
found_bool = true;
if (strcmp(line, "--test_int32=10\n") == 0)
found_int32 = true;
}
EXPECT_TRUE(found_int32);
EXPECT_TRUE(found_bool);
fclose(fp);
}
TEST(DeprecatedFunctionsTest, ReadFromFlagsFile) {
FLAGS_test_int32 = -10; // just to make the test more interesting
string filename(TmpFile("flagfile2"));
unlink(filename.c_str()); // just to be safe
bool r = AppendFlagsIntoFile(filename, GetArgv0());
EXPECT_TRUE(r);
FLAGS_test_int32 = -11;
r = ReadFromFlagsFile(filename, GetArgv0(), true);
EXPECT_TRUE(r);
EXPECT_EQ(-10, FLAGS_test_int32);
} // unnamed namespace
TEST(DeprecatedFunctionsTest, ReadFromFlagsFileFailure) {
FLAGS_test_int32 = -20;
string filename(TmpFile("flagfile3"));
FILE* fp;
EXPECT_EQ(0, SafeFOpen(&fp, filename.c_str(), "w"));
EXPECT_TRUE(fp != NULL);
// Note the error in the bool assignment below...
fprintf(fp, "%s\n--test_int32=-21\n--test_bool=not_a_bool!\n", GetArgv0());
fclose(fp);
FLAGS_test_int32 = -22;
const bool r = ReadFromFlagsFile(filename, GetArgv0(), false);
EXPECT_FALSE(r);
EXPECT_EQ(-22, FLAGS_test_int32); // the -21 from the flagsfile didn't take
}
TEST(FlagsSetBeforeInitTest, TryFromEnv) {
EXPECT_EQ("pre-set", FLAGS_test_tryfromenv);
}
// The following test case verifies that ParseCommandLineFlags() and
// ParseCommandLineNonHelpFlags() uses the last definition of a flag
// in case it's defined more than once.
DEFINE_int32(test_flag, -1, "used for testing gflags.cc");
// Parses and returns the --test_flag flag.
// If with_help is true, calls ParseCommandLineFlags; otherwise calls
// ParseCommandLineNonHelpFlags.
int32 ParseTestFlag(bool with_help, int argc, const char** const_argv) {
FlagSaver fs; // Restores the flags before returning.
// Makes a copy of the input array s.t. it can be reused
// (ParseCommandLineFlags() will alter the array).
char** const argv_save = new char*[argc + 1];
char** argv = argv_save;
memcpy(argv, const_argv, sizeof(*argv)*(argc + 1));
if (with_help) {
ParseCommandLineFlags(&argc, &argv, true);
} else {
ParseCommandLineNonHelpFlags(&argc, &argv, true);
}
delete[] argv_save;
return FLAGS_test_flag;
}
TEST(ParseCommandLineFlagsUsesLastDefinitionTest,
WhenFlagIsDefinedTwiceOnCommandLine) {
const char* argv[] = {
"my_test",
"--test_flag=1",
"--test_flag=2",
NULL,
};
EXPECT_EQ(2, ParseTestFlag(true, arraysize(argv) - 1, argv));
EXPECT_EQ(2, ParseTestFlag(false, arraysize(argv) - 1, argv));
}
TEST(ParseCommandLineFlagsUsesLastDefinitionTest,
WhenFlagIsDefinedTwiceInFlagFile) {
const char* argv[] = {
"my_test",
GetFlagFileFlag(),
NULL,
};
EXPECT_EQ(2, ParseTestFlag(true, arraysize(argv) - 1, argv));
EXPECT_EQ(2, ParseTestFlag(false, arraysize(argv) - 1, argv));
}
TEST(ParseCommandLineFlagsUsesLastDefinitionTest,
WhenFlagIsDefinedInCommandLineAndThenFlagFile) {
const char* argv[] = {
"my_test",
"--test_flag=0",
GetFlagFileFlag(),
NULL,
};
EXPECT_EQ(2, ParseTestFlag(true, arraysize(argv) - 1, argv));
EXPECT_EQ(2, ParseTestFlag(false, arraysize(argv) - 1, argv));
}
TEST(ParseCommandLineFlagsUsesLastDefinitionTest,
WhenFlagIsDefinedInFlagFileAndThenCommandLine) {
const char* argv[] = {
"my_test",
GetFlagFileFlag(),
"--test_flag=3",
NULL,
};
EXPECT_EQ(3, ParseTestFlag(true, arraysize(argv) - 1, argv));
EXPECT_EQ(3, ParseTestFlag(false, arraysize(argv) - 1, argv));
}
TEST(ParseCommandLineFlagsUsesLastDefinitionTest,
WhenFlagIsDefinedInCommandLineAndFlagFileAndThenCommandLine) {
const char* argv[] = {
"my_test",
"--test_flag=0",
GetFlagFileFlag(),
"--test_flag=3",
NULL,
};
EXPECT_EQ(3, ParseTestFlag(true, arraysize(argv) - 1, argv));
EXPECT_EQ(3, ParseTestFlag(false, arraysize(argv) - 1, argv));
}
TEST(ParseCommandLineFlagsAndDashArgs, TwoDashArgFirst) {
const char* argv[] = {
"my_test",
"--",
"--test_flag=0",
NULL,
};
EXPECT_EQ(-1, ParseTestFlag(true, arraysize(argv) - 1, argv));
EXPECT_EQ(-1, ParseTestFlag(false, arraysize(argv) - 1, argv));
}
TEST(ParseCommandLineFlagsAndDashArgs, TwoDashArgMiddle) {
const char* argv[] = {
"my_test",
"--test_flag=7",
"--",
"--test_flag=0",
NULL,
};
EXPECT_EQ(7, ParseTestFlag(true, arraysize(argv) - 1, argv));
EXPECT_EQ(7, ParseTestFlag(false, arraysize(argv) - 1, argv));
}
TEST(ParseCommandLineFlagsAndDashArgs, OneDashArg) {
const char* argv[] = {
"my_test",
"-",
"--test_flag=0",
NULL,
};
EXPECT_EQ(0, ParseTestFlag(true, arraysize(argv) - 1, argv));
EXPECT_EQ(0, ParseTestFlag(false, arraysize(argv) - 1, argv));
}
#ifdef GTEST_HAS_DEATH_TEST
TEST(ParseCommandLineFlagsUnknownFlagDeathTest,
FlagIsCompletelyUnknown) {
const char* argv[] = {
"my_test",
"--this_flag_does_not_exist",
NULL,
};
EXPECT_DEATH(ParseTestFlag(true, arraysize(argv) - 1, argv),
"unknown command line flag.*");
EXPECT_DEATH(ParseTestFlag(false, arraysize(argv) - 1, argv),
"unknown command line flag.*");
}
TEST(ParseCommandLineFlagsUnknownFlagDeathTest,
BoolFlagIsCompletelyUnknown) {
const char* argv[] = {
"my_test",
"--nothis_flag_does_not_exist",
NULL,
};
EXPECT_DEATH(ParseTestFlag(true, arraysize(argv) - 1, argv),
"unknown command line flag.*");
EXPECT_DEATH(ParseTestFlag(false, arraysize(argv) - 1, argv),
"unknown command line flag.*");
}
TEST(ParseCommandLineFlagsUnknownFlagDeathTest,
FlagIsNotABool) {
const char* argv[] = {
"my_test",
"--notest_string",
NULL,
};
EXPECT_DEATH(ParseTestFlag(true, arraysize(argv) - 1, argv),
"boolean value .* specified for .* command line flag");
EXPECT_DEATH(ParseTestFlag(false, arraysize(argv) - 1, argv),
"boolean value .* specified for .* command line flag");
}
#endif
TEST(ParseCommandLineFlagsWrongFields,
DescriptionIsInvalid) {
// These must not be automatic variables, since command line flags
// aren't unregistered and gUnit uses FlagSaver to save and restore
// command line flags' values. If these are on the stack, then when
// later tests attempt to save and restore their values, the stack
// addresses of these variables will be overwritten... Stack smash!
static bool current_storage;
static bool defvalue_storage;
FlagRegisterer fr("flag_name", NULL, "filename",
&current_storage, &defvalue_storage);
CommandLineFlagInfo fi;
EXPECT_TRUE(GetCommandLineFlagInfo("flag_name", &fi));
EXPECT_EQ("", fi.description);
EXPECT_EQ(&current_storage, fi.flag_ptr);
}
static bool ValidateTestFlagIs5(const char* flagname, int32 flagval) {
if (flagval == 5)
return true;
printf("%s isn't 5!\n", flagname);
return false;
}
static bool ValidateTestFlagIs10(const char* flagname, int32 flagval) {
return flagval == 10;
}
TEST(FlagsValidator, ValidFlagViaArgv) {
const char* argv[] = {
"my_test",
"--test_flag=5",
NULL,
};
EXPECT_TRUE(RegisterFlagValidator(&FLAGS_test_flag, &ValidateTestFlagIs5));
EXPECT_EQ(5, ParseTestFlag(true, arraysize(argv) - 1, argv));
// Undo the flag validator setting
EXPECT_TRUE(RegisterFlagValidator(&FLAGS_test_flag, NULL));
}
TEST(FlagsValidator, ValidFlagViaSetDefault) {
EXPECT_TRUE(RegisterFlagValidator(&FLAGS_test_flag, &ValidateTestFlagIs5));
// SetCommandLineOptionWithMode returns the empty string on error.
EXPECT_NE("", SetCommandLineOptionWithMode("test_flag", "5",
SET_FLAG_IF_DEFAULT));
EXPECT_TRUE(RegisterFlagValidator(&FLAGS_test_flag, NULL));
}
TEST(FlagsValidator, ValidFlagViaSetValue) {
EXPECT_TRUE(RegisterFlagValidator(&FLAGS_test_flag, &ValidateTestFlagIs5));
FLAGS_test_flag = 100; // doesn't trigger the validator
// SetCommandLineOptionWithMode returns the empty string on error.
EXPECT_NE("", SetCommandLineOptionWithMode("test_flag", "5",
SET_FLAGS_VALUE));
EXPECT_NE("", SetCommandLineOptionWithMode("test_flag", "5",
SET_FLAGS_DEFAULT));
EXPECT_NE("", SetCommandLineOption("test_flag", "5"));
EXPECT_TRUE(RegisterFlagValidator(&FLAGS_test_flag, NULL));
}
#ifdef GTEST_HAS_DEATH_TEST
TEST(FlagsValidatorDeathTest, InvalidFlagViaArgv) {
const char* argv[] = {
"my_test",
"--test_flag=50",
NULL,
};
EXPECT_TRUE(RegisterFlagValidator(&FLAGS_test_flag, &ValidateTestFlagIs5));
EXPECT_DEATH(ParseTestFlag(true, arraysize(argv) - 1, argv),
"ERROR: failed validation of new value '50' for flag 'test_flag'");
EXPECT_TRUE(RegisterFlagValidator(&FLAGS_test_flag, NULL));
}
#endif
TEST(FlagsValidator, InvalidFlagViaSetDefault) {
EXPECT_TRUE(RegisterFlagValidator(&FLAGS_test_flag, &ValidateTestFlagIs5));
// SetCommandLineOptionWithMode returns the empty string on error.
EXPECT_EQ("", SetCommandLineOptionWithMode("test_flag", "50",
SET_FLAG_IF_DEFAULT));
EXPECT_EQ(-1, FLAGS_test_flag); // the setting-to-50 should have failed
EXPECT_TRUE(RegisterFlagValidator(&FLAGS_test_flag, NULL));
}
TEST(FlagsValidator, InvalidFlagViaSetValue) {
EXPECT_TRUE(RegisterFlagValidator(&FLAGS_test_flag, &ValidateTestFlagIs5));
FLAGS_test_flag = 100; // doesn't trigger the validator
// SetCommandLineOptionWithMode returns the empty string on error.
EXPECT_EQ("", SetCommandLineOptionWithMode("test_flag", "50",
SET_FLAGS_VALUE));
EXPECT_EQ("", SetCommandLineOptionWithMode("test_flag", "50",
SET_FLAGS_DEFAULT));
EXPECT_EQ("", SetCommandLineOption("test_flag", "50"));
EXPECT_EQ(100, FLAGS_test_flag); // the setting-to-50 should have failed
EXPECT_TRUE(RegisterFlagValidator(&FLAGS_test_flag, NULL));
}
#ifdef GTEST_HAS_DEATH_TEST
TEST(FlagsValidatorDeathTest, InvalidFlagNeverSet) {
// If a flag keeps its default value, and that default value is
// invalid, we should die at argv-parse time.
const char* argv[] = {
"my_test",
NULL,
};
EXPECT_TRUE(RegisterFlagValidator(&FLAGS_test_flag, &ValidateTestFlagIs5));
EXPECT_DEATH(ParseTestFlag(true, arraysize(argv) - 1, argv),
"ERROR: --test_flag must be set on the commandline");
}
#endif
TEST(FlagsValidator, InvalidFlagPtr) {
int32 dummy;
EXPECT_FALSE(RegisterFlagValidator(NULL, &ValidateTestFlagIs5));
EXPECT_FALSE(RegisterFlagValidator(&dummy, &ValidateTestFlagIs5));
}
TEST(FlagsValidator, RegisterValidatorTwice) {
EXPECT_TRUE(RegisterFlagValidator(&FLAGS_test_flag, &ValidateTestFlagIs5));
EXPECT_TRUE(RegisterFlagValidator(&FLAGS_test_flag, &ValidateTestFlagIs5));
EXPECT_FALSE(RegisterFlagValidator(&FLAGS_test_flag, &ValidateTestFlagIs10));
EXPECT_FALSE(RegisterFlagValidator(&FLAGS_test_flag, &ValidateTestFlagIs10));
EXPECT_TRUE(RegisterFlagValidator(&FLAGS_test_flag, &ValidateTestFlagIs5));
EXPECT_TRUE(RegisterFlagValidator(&FLAGS_test_flag, NULL));
EXPECT_TRUE(RegisterFlagValidator(&FLAGS_test_flag, &ValidateTestFlagIs10));
EXPECT_TRUE(RegisterFlagValidator(&FLAGS_test_flag, NULL));
}
TEST(FlagsValidator, CommandLineFlagInfo) {
CommandLineFlagInfo info;
info = GetCommandLineFlagInfoOrDie("test_flag");
EXPECT_FALSE(info.has_validator_fn);
EXPECT_TRUE(RegisterFlagValidator(&FLAGS_test_flag, &ValidateTestFlagIs5));
info = GetCommandLineFlagInfoOrDie("test_flag");
EXPECT_TRUE(info.has_validator_fn);
EXPECT_TRUE(RegisterFlagValidator(&FLAGS_test_flag, NULL));
info = GetCommandLineFlagInfoOrDie("test_flag");
EXPECT_FALSE(info.has_validator_fn);
}
TEST(FlagsValidator, FlagSaver) {
{
FlagSaver fs;
EXPECT_TRUE(RegisterFlagValidator(&FLAGS_test_flag, &ValidateTestFlagIs5));
EXPECT_EQ("", SetCommandLineOption("test_flag", "50")); // fails validation
}
EXPECT_NE("", SetCommandLineOption("test_flag", "50")); // validator is gone
EXPECT_TRUE(RegisterFlagValidator(&FLAGS_test_flag, &ValidateTestFlagIs5));
{
FlagSaver fs;
EXPECT_TRUE(RegisterFlagValidator(&FLAGS_test_flag, NULL));
EXPECT_NE("", SetCommandLineOption("test_flag", "50")); // no validator
}
EXPECT_EQ("", SetCommandLineOption("test_flag", "50")); // validator is back
}
} // unnamed namespace
static int main(int argc, char **argv) {
// Run unit tests only if called without arguments, otherwise this program
// is used by an "external" usage test
const bool run_tests = (argc == 1);
// We need to call SetArgv before parsing flags, so our "test" argv will
// win out over this executable's real argv. That makes running this
// test with a real --help flag kinda annoying, unfortunately.
const char* test_argv[] = { "/test/argv/for/gflags_unittest",
"argv 2", "3rd argv", "argv #4" };
SetArgv(arraysize(test_argv), test_argv);
// The first arg is the usage message, also important for testing.
string usage_message = (string(GetArgv0()) +
": <useless flag> [...]\nDoes something useless.\n");
// We test setting tryfromenv manually, and making sure
// ParseCommandLineFlags still evaluates it.
FLAGS_tryfromenv = "test_tryfromenv";
setenv("FLAGS_test_tryfromenv", "pre-set", 1);
// Modify flag values from declared default value in two ways.
// The recommended way:
SetCommandLineOptionWithMode("changed_bool1", "true", SET_FLAGS_DEFAULT);
// The non-recommended way:
FLAGS_changed_bool2 = true;
SetUsageMessage(usage_message);
SetVersionString("test_version");
ParseCommandLineFlags(&argc, &argv, true);
MakeTmpdir(&FLAGS_test_tmpdir);
int exit_status = 0;
if (run_tests) {
fprintf(stdout, "Running the unit tests now...\n\n"); fflush(stdout);
exit_status = RUN_ALL_TESTS();
} else fprintf(stderr, "\n\nPASS\n");
ShutDownCommandLineFlags();
return exit_status;
}
} // GFLAGS_NAMESPACE
int main(int argc, char** argv) {
return GFLAGS_NAMESPACE::main(argc, argv);
}
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