From c73a708307fe21b5a89d1e43fabde45cdbb33833 Mon Sep 17 00:00:00 2001
From: debugtalk <mail@debugtalk.com>
Date: Tue, 22 Jan 2019 21:19:03 +0800
Subject: [PATCH] print Invalid testcase path or testcases

---
 httprunner/api.py   | 2 +-
 httprunner/utils.py | 3 ++-
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/httprunner/api.py b/httprunner/api.py
index d0190388..43292e00 100644
--- a/httprunner/api.py
+++ b/httprunner/api.py
@@ -233,7 +233,7 @@ class HttpRunner(object):
         elif validator.is_testcases(path_or_tests):
             return self.run_tests(path_or_tests)
         else:
-            raise exceptions.ParamsError("invalid testcase path or testcases.")
+            raise exceptions.ParamsError("Invalid testcase path or testcases: {}".format(path_or_tests))
 
     @property
     def summary(self):
diff --git a/httprunner/utils.py b/httprunner/utils.py
index 109cdb0b..e9ba70f3 100644
--- a/httprunner/utils.py
+++ b/httprunner/utils.py
@@ -512,7 +512,8 @@ def print_io(in_out):
     content += prepare_content("Out", _out)
     content += "-" * 56 + "\n"
 
-    logger.log_info(content)
+    if _out:
+        logger.log_info(content)
 
 
 def create_scaffold(project_name):