commit db292d8bab67ec06660e4e79deb759ef3d81a7a4
author Bindu Mahadev <bmahadev@google.com> Fri Jun 01 18:32:00 2018 -0700
committer Bindu Mahadev <bmahadev@google.com> Fri Jun 01 18:32:00 2018 -0700
tree 489398843d61bc298db01ff31a8be294675b20bb
parent 80e97d1d50865fdbe72acc8a85e612332034fe77

[Tests]Quick fix for iperf flakiness.

If iperf server is busy just run ping.

Bug: 93271682
Test: Local
Change-Id: I34db582162bead48664ce8e6445f401e7a91b6f0

acts/tests/google/wifi/WifiStressTest.py

diff --git a/acts/tests/google/wifi/WifiStressTest.py b/acts/tests/google/wifi/WifiStressTest.py
index 9b7dbd3..063f557 100755
--- a/acts/tests/google/wifi/WifiStressTest.py
+++ b/acts/tests/google/wifi/WifiStressTest.py
@@ -32,7 +32,7 @@
 WAIT_BEFORE_CONNECTION = 30
 
 TIMEOUT = 1
-
+PING_ADDR = 'www.google.com'
 
 class WifiStressTest(WifiBaseTest):
     """WiFi Stress test class.
@@ -121,6 +121,18 @@
             ssid)
         wutils.wifi_connect_by_id(self.dut, net_id)
 
+    def run_ping(self, sec):
+        """Run ping for given number of seconds.
+
+        Args:
+            sec: Time in seconds to run teh ping traffic.
+
+        """
+        self.log.info("Running ping for %d seconds" % sec)
+        result = self.dut.adb.shell("ping -w %d %s" %(sec, PING_ADDR))
+        self.log.debug("Ping Result = %s" % result)
+        if "100% packet loss" in result:
+            raise signals.TestFailure("100% packet loss during ping")
 
     """Tests"""
 
@@ -159,8 +171,7 @@
             result, data = self.dut.run_iperf_client(self.iperf_server_address, args)
             if not result:
                 self.log.debug("Error occurred in iPerf traffic.")
-                raise signals.TestFailure("Error occurred in iPerf traffic. Current"
-                    " WiFi state = %d" % self.dut.droid.wifiCheckState())
+                self.run_ping(10)
             wutils.wifi_forget_network(self.dut,self.wpa_5g[WifiEnums.SSID_KEY])
             time.sleep(WAIT_BEFORE_CONNECTION)
 
@@ -182,11 +193,9 @@
         self.log.info("Running iperf client {}".format(args))
         result, data = self.dut.run_iperf_client(self.iperf_server_address,
             args, timeout=sec+1)
-        self.dut.droid.wifiDisconnect()
         if not result:
             self.log.debug("Error occurred in iPerf traffic.")
-            raise signals.TestFailure("Error occurred in iPerf traffic. Current"
-                " WiFi state = %d" % self.dut.droid.wifiCheckState())
+            self.run_ping(sec)
 
     @test_tracker_info(uuid="d367c83e-5b00-4028-9ed8-f7b875997d13")
     def test_stress_wifi_failover(self):