Quickfix: Travis should fail if one of the tests failed (#98)

resolves #96

test_coverage.sh

@@ -3,19 +3,28 @@
 # by Wáng Hǎiliàng
 DIR_SOURCE="$(find . -maxdepth 10 -type f -not -path '*/vendor*' -name '*.go' | xargs -I {} dirname {} | sort | uniq)"
 
-
 # If you want to test in combination with the -race flag on you have to use the atomic mode:
 # echo "mode: atomic" > profile.cov
 echo "mode: count" > profile.cov
 
+all_tests_passed=true
 # Run test coverage on each subdirectories and merge the coverage profile
 for dir in ${DIR_SOURCE};
 do
     # change to -covermode=atomic if you want to run in combination with -race:
     go test -covermode=count -coverprofile=$dir/profile.tmp $dir
+    if [ $? -ne 0 ]; then
+        all_tests_passed=false
+    fi
     if [ -f $dir/profile.tmp ]
     then
         cat $dir/profile.tmp | tail -n +2 >> profile.cov
         rm $dir/profile.tmp
     fi
-done
+done
+
+if [[ $all_tests_passed = true ]]; then
+    exit 0;
+else
+    exit 1;
+fi