代码覆盖率 - 当我尝试使用 gcovr 生成 html 报告时出错，'NoneType'对象没有属性'startswith'

Question

我得到错误

'NoneType' object has no attribute 'startswith'

当尝试使用gcovr（用于估计测试覆盖率的工具）生成html报告时

知道我该怎么修吗？关于信息，我在Ubuntu 14.04上。请参阅下面的详细错误消息：

parallels:try_gcovr$ gcovr -r .  --html
Traceback (most recent call last):
  File "/usr/local/bin/gcovr", line 1970, in <module>
    print_html_report(covdata, options.html_details)
  File "/usr/local/bin/gcovr", line 1373, in print_html_report
    ttmp = os.path.abspath(options.output).split('.')
  File "/usr/lib/python2.7/posixpath.py", line 367, in abspath
    if not isabs(path):
  File "/usr/lib/python2.7/posixpath.py", line 61, in isabs
    return s.startswith('/')
AttributeError: 'NoneType' object has no attribute 'startswith'

Answer 1

我遇到了同样的问题，并使用以下命令解决了它。

gcovr-html--html详细信息-o output-file-name.html-v-r。

这是我的设置和命令：

$ ls; ls testDir
main.cpp   Makefile   test.cpp   testDir
test.cpp  test.h

$ make test
g++  -fprofile-arcs -ftest-coverage -fPIC -O0 -c main.cpp -o main.o
g++  -o  test testDir/test.o main.o -lgcov -coverage

$ ./test
hello world
$ ls;ls testDir
main.cpp   main.gcda  main.o test
main.gcno  Makefile test.cpp  testDir 
test.cpp  test.gcda  test.gcno  test.h  test.o
$ gcovr -r . --html
Traceback (most recent call last):
  File "/usr/bin/gcovr", line 1970, in <module>
    print_html_report(covdata, options.html_details)
  File "/usr/bin/gcovr", line 1373, in print_html_report
    ttmp = os.path.abspath(options.output).split('.')
  File "/usr/lib64/python2.7/posixpath.py", line 343, in abspath
    if not isabs(path):
  File "/usr/lib64/python2.7/posixpath.py", line 53, in isabs
    return s.startswith('/')
AttributeError: 'NoneType' object has no attribute 'startswith'

$ gcovr --html --html-details -o output.html -v -r .
//a bunch of gcov output while generating files...
$ ls; ls testDir
main.cpp   Makefile   output.html output.testDir_test.cpp.html  test.cpp   testDir 
output.main.cpp.html  test 
test.cpp  test.gcda  test.gcno  test.h  test.o
$ cat Makefile

OBJS=testDir/test.o main.o
EXEC_TARGET=test
CXXFLAGS+=-fprofile-arcs -ftest-coverage -fPIC -O0
bla:
    @echo $(GXX)
LINKLIBSCTT+=-lgcov -coverage
#Executable target rule
$(EXEC_TARGET): $(OBJS)
    $(CXX) $(LINK_FLAGS) -o  $(EXEC_TARGET) $(OBJS) $(LINKLIBSCTT)

#implicit rule to compile object files
%.o: %.cpp
    $(CXX) $(INCLUDES) $(CXXFLAGS) -c $^ -o $@

clean:
    rm -f *.o *.rpo *.d $(EXEC_TARGET)