[PATCH v2 3/4] Netperf: fix confidence parsing when result is 0

[Ondrej Lichtner]

From: Ondrej Lichtner <olichtne(a)redhat.com&gt;

When the measured netperf result is 0, the confidence is reported as
"-nan" which resulted in tracebacks when parsing the value with a regex
for numbers.

This commit fixes that by checking if the regex passed and returning 0
in cases when the regex doesn't fit the string.

Fixes #170

Signed-off-by: Ondrej Lichtner <olichtne(a)redhat.com&gt;
---
 test_modules/Netperf.py | 13 +++++++++----
 1 file changed, 9 insertions(+), 4 deletions(-)

diff --git a/test_modules/Netperf.py b/test_modules/Netperf.py
index d09bdfc..6950bb8 100644
--- a/test_modules/Netperf.py
+++ b/test_modules/Netperf.py
@@ -235,12 +235,17 @@ class Netperf(TestGeneric):
     def _parse_confidence_omni(self, output):
         pattern_throughput_confid = "THROUGHPUT_CONFID=([-]?\d+\.\d+)"
         pattern_confidence_level = "CONFIDENCE_LEVEL=(\d+)"
-        throughput_confid = float(re.search(pattern_throughput_confid, output).group(1))
-        confidence_level = int(re.search(pattern_confidence_level, output).group(1))
 
-        real_confidence = (confidence_level, throughput_confid/2)
+        throughput_confid = re.search(pattern_throughput_confid, output)
+        confidence_level = re.search(pattern_confidence_level, output)
 
-        return real_confidence
+        if throughput_confid is not None and confidence_level is not None:
+            throughput_confid = float(throughput_confid.group(1))
+            confidence_level = int(confidence_level.group(1))
+            real_confidence = (confidence_level, throughput_confid/2)
+            return real_confidence
+        else:
+            return (0, 0.0)
 
     def _parse_confidence_non_omni(self, output):
         normal_pattern = r'\+/-(\d+\.\d*)% @ (\d+)% conf\.'
-- 
2.9.0