Merge pull request #1651 from taosdata/add-test-coverage-support

Add branch coverage support and email-to-author notification.

.codecov.yml

+coverage:
+  precision: 2
+  notify:
+    email:
+      default:
+        to:
+          - sdsang@taosdata.com
+          - &author
+        only_pulls: false
+        layout: reach, diff, flags, files
+        flags: null
+        paths: null

.travis.yml

@@ -146,8 +146,8 @@ matrix:
           fi
 
           cd ${TRAVIS_BUILD_DIR}
-          lcov -d . --capture -o coverage.info
-          lcov -l coverage.info || exit $?
+          lcov -d . --capture --rc lcov_branch_coverage=1 -o coverage.info
+          lcov -l --rc lcov_branch_coverage=1 coverage.info || exit $?
 
           gem install coveralls-lcov
 
@@ -166,7 +166,7 @@ matrix:
             exit $?
           fi
 
-          bash <(curl -s https://codecov.io/bash) -f coverage.info
+          bash <(curl -s https://codecov.io/bash) -y .codecov.yml -f coverage.info
           if [ "$?" -eq "0" ]; then
             echo -e "${GREEN} ## Uploaded to Codecov! ## ${NC} "
           else