[Tests]Enable option for hidden network on the dynamic AP

Provided an option to configure hidden networks on the dynamicAP.
Added tests that exercise hidden networks and connection.

Bug: 72182206
Test: Tested locally
Change-Id: I30b91fd489e413f1081cb66d7415645aef059b42
diff --git a/acts/tests/google/wifi/WifiHiddenSSIDTest.py b/acts/tests/google/wifi/WifiHiddenSSIDTest.py
new file mode 100755
index 0000000..f794a36
--- /dev/null
+++ b/acts/tests/google/wifi/WifiHiddenSSIDTest.py
@@ -0,0 +1,166 @@
+#!/usr/bin/env python3.4
+#
+#   Copyright 2018 - The Android Open Source Project
+#
+#   Licensed under the Apache License, Version 2.0 (the "License");
+#   you may not use this file except in compliance with the License.
+#   You may obtain a copy of the License at
+#
+#       http://www.apache.org/licenses/LICENSE-2.0
+#
+#   Unless required by applicable law or agreed to in writing, software
+#   distributed under the License is distributed on an "AS IS" BASIS,
+#   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+#   See the License for the specific language governing permissions and
+#   limitations under the License.
+
+import itertools
+import pprint
+import queue
+import time
+
+import acts.base_test
+import acts.signals
+import acts.test_utils.wifi.wifi_test_utils as wutils
+import acts.utils
+
+from acts import asserts
+from acts.test_decorators import test_tracker_info
+from acts.test_utils.wifi.WifiBaseTest import WifiBaseTest
+
+
+class WifiHiddenSSIDTest(WifiBaseTest):
+    """Tests for APIs in Android's WifiManager class.
+
+    Test Bed Requirement:
+    * One Android device
+    * Several Wi-Fi networks visible to the device, including an open Wi-Fi
+      network.
+    """
+
+    def __init__(self, controllers):
+        WifiBaseTest.__init__(self, controllers)
+
+    def setup_class(self):
+        self.dut = self.android_devices[0]
+        wutils.wifi_test_device_init(self.dut)
+        req_params = []
+        opt_param = [
+            "open_network", "reference_networks"]
+        self.unpack_userparams(
+            req_param_names=req_params, opt_param_names=opt_param)
+
+        if "AccessPoint" in self.user_params:
+            self.legacy_configure_ap_and_start(hidden=True)
+
+        asserts.assert_true(
+            len(self.reference_networks) > 0,
+            "Need at least one reference network with psk.")
+        self.open_hidden_2g = self.open_network[0]["2g"]
+        self.open_hidden_5g = self.open_network[0]["5g"]
+        self.wpa_hidden_2g = self.reference_networks[0]["2g"]
+        self.wpa_hidden_5g = self.reference_networks[0]["5g"]
+
+    def setup_test(self):
+        self.dut.droid.wakeLockAcquireBright()
+        self.dut.droid.wakeUpNow()
+
+    def teardown_test(self):
+        self.dut.droid.wakeLockRelease()
+        self.dut.droid.goToSleepNow()
+
+    def on_fail(self, test_name, begin_time):
+        self.dut.take_bug_report(test_name, begin_time)
+        self.dut.cat_adb_log(test_name, begin_time)
+
+    def teardown_class(self):
+        wutils.reset_wifi(self.dut)
+        if "AccessPoint" in self.user_params:
+            del self.user_params["reference_networks"]
+            del self.user_params["open_network"]
+
+    """Helper Functions"""
+
+    def check_hiddenSSID_in_scan(self, ap_ssid, max_tries=2):
+        """Check if the ap started by wifi tethering is seen in scan results.
+
+        Args:
+            ap_ssid: SSID of the ap we are looking for.
+            max_tries: Number of scans to try.
+        Returns:
+            True: if ap_ssid is found in scan results.
+            False: if ap_ssid is not found in scan results.
+        """
+        for num_tries in range(max_tries):
+            wutils.start_wifi_connection_scan(self.dut)
+            scan_results = self.dut.droid.wifiGetScanResults()
+            match_results = wutils.match_networks(
+                {wutils.WifiEnums.SSID_KEY: ap_ssid}, scan_results)
+            if len(match_results) > 0:
+                return True
+        return False
+
+    def add_hiddenSSID_and_connect(self, hidden_network):
+        """Add the hidden network and connect to it.
+
+        Args:
+            hidden_network: The hidden network config to connect to.
+
+        """
+        ret = self.dut.droid.wifiAddNetwork(hidden_network)
+        asserts.assert_true(ret != -1, "Add network %r failed" % hidden_network)
+        self.dut.droid.wifiEnableNetwork(ret, 0)
+        wutils.connect_to_wifi_network(self.dut, hidden_network)
+        if not wutils.validate_connection(self.dut):
+            raise signals.TestFailure("Fail to connect to internet on %s" %
+                                       hidden_network)
+
+    """Tests"""
+
+    @test_tracker_info(uuid="d0871f98-6049-4937-a288-ec4a2746c771")
+    def test_connect_to_wpa_hidden_2g(self):
+        """Connect to a WPA, 2G network.
+
+        Steps:
+        1. Add a WPA, 2G hidden network.
+        2. Ensure the network is visible in scan.
+        3. Connect and run ping.
+
+        """
+        self.add_hiddenSSID_and_connect(self.wpa_hidden_2g)
+
+    @test_tracker_info(uuid="c558b31a-549a-4012-9052-275623992187")
+    def test_connect_to_wpa_hidden_5g(self):
+        """Connect to a WPA, 5G hidden  network.
+
+        Steps:
+        1. Add a WPA, 5G hidden network.
+        2. Ensure the network is visible in scan.
+        3. Connect and run ping.
+
+        """
+        self.add_hiddenSSID_and_connect(self.wpa_hidden_5g)
+
+    @test_tracker_info(uuid="cdfce76f-6374-439d-aa1d-e920508269d2")
+    def test_connect_to_open_hidden_2g(self):
+        """Connect to a Open, 2G hidden  network.
+
+        Steps:
+        1. Add a Open, 2G hidden network.
+        2. Ensure the network is visible in scan.
+        3. Connect and run ping.
+
+        """
+        self.add_hiddenSSID_and_connect(self.open_hidden_2g)
+
+    @test_tracker_info(uuid="29ccbae4-4382-4df8-8fc5-00e3104230d0")
+    def test_connect_to_open_hidden_5g(self):
+        """Connect to a Open, 5G hidden  network.
+
+        Steps:
+        1. Add a Open, 5G hidden network.
+        2. Ensure the network is visible in scan.
+        3. Connect and run ping.
+
+        """
+        self.add_hiddenSSID_and_connect(self.open_hidden_5g)