gtest | 易学教程

gtest C++单元测试框架，由google公司发布。

断言

//bool值检查
//期待结果是true
ASSERT_TRUE(XX)
//期待结果是false
ASSERT_FALSE(XX)
//数值型数据检查
//期待结果X1=X2
ASSERT_EQ(X1，X2)，
//期待结果X1!=X2
ASSERT_NE(X1，X2)
//less than <
ASSERT_LT(X1，X2)
//greater than >
ASSERT_GT(X1，X2)
//less equal <=
ASSERT_LE(X1，X2)
//greater equal >=
ASSERT_GE(X1，X2)
//NULL指针和空字符串被认为是不同的
//期待字符串相等
ASSERT_STREQ(str1, str2)
//忽略大小写
ASSERT_STRCASEEQ(expected_str,actual_str); 	
//期待字符串不等
ASSERT_STRNE(str1, str2)
//忽略大小写
ASSERT_STRCASENE(str1, str2);

//异常抛出
ASSERT_ANY_THROW(statement);

EXPECT_系列

//程序死了并且错误信息和X2匹配，如果X2为空字符串，则只需要看程序是否死了
ASSERT_DEATH(X1，X2)

TEST（）

使用TEST()宏定义和命名测试函数，无返回值
TEST(TestCaseName, TestName) {
…
}

TestCaseName 一系列test的组合名称。
TestCaseName ==> pcmtest
TestName 具体每一个测试项
CheckAudioDir，GetSoundDevs测试函数

TEST(pcmtest, CheckAudioDir) {
    pcms = getPcmNodes();
    ASSERT_GT(pcms, 0);
}
TEST(pcmtest1, GetSoundDevs) {
    int err = getSndDev(pcms);
    ASSERT_EQ(0, err);
}


#define PCM_PREFIX      "pcm"
#define MIXER_PREFIX    "control"
#define TIMER_PREFIX    "timer"

const char kSoundDir[] = "/dev/snd";

int getPcmNodes(void)
{
    DIR *d;
    struct dirent *de;
    unsigned int pcount = 0;

    d = opendir(kSoundDir);
    if (d == 0)
        return 0;
    while ((de = readdir(d)) != NULL) {
        if (de->d_name[0] == '.')
            continue;
        if (strstr(de->d_name, PCM_PREFIX))
            pcount++;
    }
    closedir(d);
    return pcount;
}

运行

Running main() from gtest_main.cc
[==========] Running 2 tests from 2 test cases.
[----------] Global test environment set-up.
[----------] 1 test from pcmtest
[ RUN      ] pcmtest.CheckAudioDir
[       OK ] pcmtest.CheckAudioDir (0 ms)
[----------] 1 test from pcmtest (1 ms total)
[----------] 1 test from pcmtest1
[ RUN      ] pcmtest1.GetSoundDevs
[       OK ] pcmtest1.GetSoundDevs (7 ms)
[----------] 1 test from pcmtest1 (7 ms total)
[----------] Global test environment tear-down
[==========] 2 tests from 2 test cases ran. (12 ms total)
[  PASSED  ] 2 tests.

TEST_F

作用：为测试用例准备/清理数据

1.写一个类，继承testing::Test，然后实现两个方法：SetUp，TearDown
SetUp方法在每个TestCase之前执行；TearDown方法在每个TestCase之后执行。
2.定义一系列TEST_F(TestSuiteName, TestName)

class FsRecoveryTest : public ::testing::Test {
 protected:
  FsRecoveryTest() : fs_type(FS_UNKNOWN), blk_fd_(-1) {}

 virtual void SetUp() {
    ...
  }

  virtual void TearDown() {
    ...
  }

  Fs_Type fs_type;

 private:
  char blk_path_[FILENAME_MAX];
  int blk_fd_;
}

TestCase, TestSuite,tests 区别

如果自定义SetUp,TearDown
SetUp,TearDown 会在FsRecoveryTest , FsRecoveryTest1 这些testcase之前和之后运行
如果自定义SetUpTestCase,TearDownTestCase
那么就是在第一个testcase(FsRecoveryTest)之前运行SetUpTestCase，最后一个testcase(FsRecoveryTest1)之后运行TearDownTestCase

TEST_F(FsRecoveryTest, EXT4_CorruptGdt) {
...
}
TEST_F(FsRecoveryTest, EXT4_SetErrorBit) {
...
}
TEST_F(FsRecoveryTest1, XXX1) {
...
}
TEST_F(FsRecoveryTest1, XXX2) {
...
}

运行测试

Running main() from gtest_main.cc
[==========] Running 2 tests from 1 test case.
[----------] Global test environment set-up.
[----------] 2 tests from FsRecoveryTest
[ RUN      ] FsRecoveryTest.EXT4_CorruptGdt
[       OK ] FsRecoveryTest.EXT4_CorruptGdt (721 ms)
[ RUN      ] FsRecoveryTest.EXT4_SetErrorBit
[       OK ] FsRecoveryTest.EXT4_SetErrorBit (595 ms)
[----------] 2 tests from FsRecoveryTest (1317 ms total)

[----------] Global test environment tear-down
[==========] 2 tests from 1 test case ran. (1318 ms total)
[  PASSED  ] 2 tests.

来源：CSDN

作者：gbmaotai

链接：https://blog.csdn.net/gbmaotai/article/details/103693794

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