测试自动化 2011-01-04 GTest

GTest

 

1. 在Cygwin下面执行GTest示例程序

cd ${GTEST_HOME}/make

make

./sample1_unittest

 

$ ./sample1_unittest
Running main() from gtest_main.cc
[==========] Running 6 tests from 2 test cases.
[----------] Global test environment set-up.
[----------] 3 tests from FactorialTest
[ RUN      ] FactorialTest.Negative
[       OK ] FactorialTest.Negative (1 ms)
[ RUN      ] FactorialTest.Zero
[       OK ] FactorialTest.Zero (0 ms)
[ RUN      ] FactorialTest.Positive
[       OK ] FactorialTest.Positive (0 ms)
[----------] 3 tests from FactorialTest (10 ms total)

[----------] 3 tests from IsPrimeTest
[ RUN      ] IsPrimeTest.Negative
[       OK ] IsPrimeTest.Negative (0 ms)
[ RUN      ] IsPrimeTest.Trivial
[       OK ] IsPrimeTest.Trivial (0 ms)
[ RUN      ] IsPrimeTest.Positive
[       OK ] IsPrimeTest.Positive (0 ms)
[----------] 3 tests from IsPrimeTest (11 ms total)

[----------] Global test environment tear-down
[==========] 6 tests from 2 test cases ran. (36 ms total)
[  PASSED  ] 6 tests.

 

2. 在Cygwin下执行第一个测试程序

* build gtest产生库libgtest.a

 

g++ -I${GTEST_DIR}/include -I${GTEST_DIR} -c ${GTEST_DIR}/src/gtest-all.cc
ar -rv libgtest.a gtest-all.o

 

* 程序

#include "gtest/gtest.h"

namspace
{
 class FooTest public ::testing::Test
 {
 //protected:
  FooTest() {}
  virtual ~FooTest() {}
  virtual void SetUp() {}
  virtual void TearDown() {}
 };
  
  TEST_F(FooTest, OneEqual) {
   EXPECT_EQ(0,0);
  }
  
  TEST_F(FooTest, OneEqual) {
   EXPECT_EQ(1,1);
  }
}

 

* 编译运行

1. 问题1

$ g++ -I./include try.cpp libgtest.a -otry
try.cpp:4: error: function definition does not declare parameters

 

 

$ g++ -I./include try.cpp libgtest.a -otry
try.cpp:19: error: redefinition of ‘class<unnamed>::FooTest_OneEqual_Test’
try.cpp:15: error: previous definition of ‘class<unnamed>::FooTest_OneEqual_Tes
t’
try.cpp:19: error: redefinition of ‘testing::TestInfo* const <unnamed>::FooTest
_OneEqual_Test::test_info_’
try.cpp:15: error: ‘testing::TestInfo* const <unnamed>::FooTest_OneEqual_Test::
test_info_’ previously declared here
try.cpp:19: error: redefinition of ‘void<unnamed>::FooTest_OneEqual_Test::TestB
ody()’
try.cpp:15: error: ‘virtual void<unnamed>::FooTest_OneEqual_Test::TestBody()’
previously defined here

 

原因：代码里OneEqual重复使用了

 

2. 问题2

$ g++ -I./include libgtest.a -otry
/usr/lib/gcc/i686-pc-cygwin/4.3.4/../../../libcygwin.a(libcmain.o):(.text+0xa9):
 undefined reference to `_WinMain@16'
collect2: ld returned 1 exit status

 

原因：g++缺少源代码 -c try.cpp

注意：解释不正确。-c 开关只和编译后无法执行有关（Cannot Execute Binary File ）

 

3. 问题3

$ ./try
./try: ./try: cannot execute binary file

 

原因：-c的含义是不link，与Linux不一样

 

4. 问题4

一大堆未定义符号

 

$ g++ -I./include libgtest.a try.cpp -otry
/cygdrive/c/DOCUME~1/ADMINI~1/LOCALS~1/Temp/ccA77DJU.o:try.cpp:(.text+0xcb): und
efined reference to `testing::internal::MakeAndRegisterTestInfo(char const*, cha
r const*, char const*, char const*, void const*, void (*)(), void (*)(), testing
::internal::TestFactoryBase*)'
/cygdrive/c/DOCUME~1/ADMINI~1/LOCALS~1/Temp/ccA77DJU.o:try.cpp:(.text+0x127): un
defined reference to `testing::internal::MakeAndRegisterTestInfo(char const*, ch
ar const*, char const*, char const*, void const*, void (*)(), void (*)(), testin
g::internal::TestFactoryBase*)'

 

最后仍然有 undefined reference to _WinMain

 

原因：try.cpp与libgtest.a的顺序？

 

5. 问题5：

g++ -I./include try.cpp libgtest.a -otry -lm

 

$ g++ -I./include try.cpp libgtest.a -otry
/usr/lib/gcc/i686-pc-cygwin/4.3.4/../../../libcygwin.a(libcmain.o):(.text+0xa9):
 undefined reference to `_WinMain@16'
collect2: ld returned 1 exit status

 

原因：整个程序里没有WinMain。可能需要从库里找到有执行程序入口的包。

故把src/gtest_main.cc编译成gtest_main.o

 

6. 问题6

 

g++ -I./include try.cpp libgtest.a gtest_main.o -otry

 

libgtest.a(gtest_main.o):class_type_info.cc:(.idata+0x4a4): multiple definition
of `__imp___ZSt4cerr'
libgtest.a(gtest_main.o):class_type_info.cc:(.idata+0x4a4): first defined here
libgtest.a(gtest_main.o):cygming-crtend.c:(.data+0x0): multiple definition of `_
register_frame_info_ptr'
/usr/lib/gcc/i686-pc-cygwin/4.3.4/crtbegin.o:cygming-crtbegin.c:(.data+0x0): fir
st defined here
libgtest.a(gtest_main.o):class_type_info.cc:(.idata+0x4a8): multiple definition
of `__imp___ZSt4cout'
libgtest.a(gtest_main.o):class_type_info.cc:(.idata+0x4a8): first defined here
libgtest.a(gtest_main.o):class_type_info.cc:(.idata+0x4c4): multiple definition
of `__imp___ZTISt13runtime_error'
libgtest.a(gtest_main.o):class_type_info.cc:(.idata+0x4c4): first defined here
/usr/lib/gcc/i686-pc-cygwin/4.3.4/crtbegin.o:cygming-crtbegin.c:(.data+0x8): und
efined reference to `__Jv_RegisterClasses'
collect2: ld returned 1 exit status