add few coverage fr future

Author: sensorario

concurrency/barrier/barrier.go

@@ -67,10 +67,3 @@ func makeRequest(out chan<- Response, url string) {
 	res.Resp = string(byt)
 	out <- res
 }
-
-func main() {
-	barrier(
-		"http://httpbin.org/headers",
-		"http://httpbin.org/user-agent",
-	)
-}

concurrency/barrier/barrier_test.go

@@ -0,0 +1,10 @@
+package main
+
+import "testing"
+
+func TestDidAllUrlsDidLoaded(t *testing.T) {
+	barrier(
+		"http://httpbin.org/headers",
+		"http://httpbin.org/user-agent",
+	)
+}