make tests quieter (#2468)

Don't mix every http request in with the tests output.
Don't print that the file servers are starting unless
-vv flag is passed.

Capture the output of run with run_output which returns
stdout, stderr and exit_code. Test against this rather
than relying on sys.exit.

1 files changed, 5 insertions, 4 deletions

diff --git a/tools/test_format.py b/tools/test_format.py
index a0d5ba08e..00374d130 100755
--- a/tools/test_format.py
+++ b/tools/test_format.py
@@ -9,11 +9,12 @@ import subprocess
 
 def main():
     util.run([sys.executable, "tools/format.py"])
-    output = util.run_output(
-        ["git", "status", "-uno", "--porcelain", "--ignore-submodules"])
-    if len(output) > 0:
+    result = util.run_output(
+        ["git", "status", "-uno", "--porcelain", "--ignore-submodules"],
+        exit_on_fail=True)
+    if result.out:
         print "Run tools/format.py "
-        print output
+        print result.out
         sys.exit(1)