add code coverage report

.coveralls.yml

@@ -0,0 +1 @@
+repo_token: 9maTZamdcMQ33JqgPXV9BgmzyvTTpXyiC

.travis.yml

@@ -23,13 +23,21 @@ before_install:
   - if [[ "$TRAVIS_OS_NAME" == "linux" ]]; then sudo apt-get install gcc-4.8 g++-4.8 -y ; fi
   - if [[ "$TRAVIS_OS_NAME" == "linux" ]]; then sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-4.8 60 --slave /usr/bin/g++ g++ /usr/bin/g++-4.8 ; fi
 
+  - if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then brew install lcov ; fi
+
   - ./prepare.sh
 
 install:
+  - gem install coveralls-lcov
 
 script:
     ./build.sh && ./self-build.sh
 
+after_success:
+  - lcov --directory build --base-directory src --capture --no-external --output-file coverage.info # capture coverage info
+  - lcov --list coverage.info # debug before upload
+  - coveralls-lcov coverage.info # uploads to coveralls
+
 cache:
     directories:
       - iwyu

src/task/gtest/cxx/cxx_file_crc_task-utest.cpp

@@ -121,7 +121,7 @@ TEST_F(CxxFileCrcTaskTest, SLOW_includeFromOneDirectory)
     EXPECT_EQ(0xb7e440100a03d2c5, task->crc()) << std::hex << task->crc();
 }
 
-TEST_F(CxxFileCrcTaskTest, includeFromTwoDirectories)
+TEST_F(CxxFileCrcTaskTest, VERYSLOW_includeFromTwoDirectories)
 {
     // This test makes sure that including from having more than one include directory
     // with the same fs directory is working.