docs(test): add missing inline docs

test_helpers.go

@@ -8,6 +8,7 @@ import (
 	"net/http"
 )
 
+// CreateTestContext returns a fresh engine and context for testing purposes
 func CreateTestContext(w http.ResponseWriter) (c *Context, r *Engine) {
 	r = New()
 	c = r.allocateContext()