server/site_tests/network_WiFiRoaming/003SSIDMultiSwitchBack

# Copyright (c) 2010 The Chromium OS Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

# This test run is designed to check that we roam successfully when signal
# strength varies.
{ "name":"MultiSwitch",
  "skip_test":"this test is known to be flaky",
  "steps":[
    [ "create",         { "type":"hostap" } ],

    [ "config",         { "channel":"2412", "mode":"11g", "pureg":None } ],

    # Connect with the specific purpose of establishing "normal" signal levels
    # of signal and noise for this channel.
    [ "connect",        { "security":"none" } ],

    # Stay on channel for a while, generating some traffic.
    [ "client_ping",    { "count":"10" } ],

    # Collect the average signal strength during to connection fo use in
    # setting a reasonable threshold.
    [ "client_get_signal" ],
    [ "disconnect" ],

    # Set a background scan signal threshold relative to the values
    # derived above.  We set the threshold here so that when we vary the
    # transmit power on the AP, we will receive a "low signal" alert on
    # the DUT.
    [ "bgscan_set",     { "signal":"auto", "offset":"-3" }],

    # Connect to the first AP.
    [ "connect",        { "security":"none" } ],
    [ "client_ping",    { "count":"10" } ],

    # Once the connection is up, restore the profile values to flimflam default
    [ "bgscan_set",     { "signal":"default" }],

    # Create a second AP at the same time on the 5GHz radio, Channel 48
    [ "config",         { "channel":"5240", "ht40-":None, "puren":None,
                          "multi_interface":None } ],

    # Drop the transmit power of the first AP
    [ "set_txpower",    { "power":"fixed 0" } ],

    # Instead of explicitly connecting, just wait to see if the DUT
    # re-connects by itself
    [ "wait_service",   { "run_timeout":40,   # Timeout connection in 20 seconds
                          "debug":True,       # Print out all state transitions
                          "states":[
                             (None, '+ready')  # Wait for the "current AP" (as
                          ] } ],              # read off the AP)
                                              # service to transition to "ready"
    [ "client_ping",    { "count":"10", "ap":1 } ],

    # Verify that the client roamed to the 5GHz band.
    [ "client_check_frequency", [ "5240" ] ],

    # Return AP to auto transmit power
    [ "set_txpower",    { "power":"auto" } ],

    [ "destroy" ],
  ],
}