538 lines
19 KiB
C++
538 lines
19 KiB
C++
//
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// Copyright (C) 2013 The Android Open Source Project
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//
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#include "shill/wifi/scan_session.h"
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#include <errno.h>
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#include <limits>
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#include <memory>
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#include <set>
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#include <vector>
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#include <base/memory/weak_ptr.h>
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#include <gmock/gmock.h>
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#include <gtest/gtest.h>
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#include "shill/mock_event_dispatcher.h"
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#include "shill/net/mock_netlink_manager.h"
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#include "shill/net/netlink_manager.h"
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#include "shill/net/netlink_message_matchers.h"
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#include "shill/net/nl80211_message.h"
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using std::set;
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using std::vector;
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using testing::_;
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using testing::ContainerEq;
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using testing::Test;
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namespace shill {
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static const uint16_t kExpectedFreq5640 = 5640;
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static const uint16_t kExpectedFreq5600 = 5600;
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static const uint16_t kExpectedFreq5580 = 5580;
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static const uint16_t kExpectedFreq5560 = 5560;
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static const uint16_t kExpectedFreq5620 = 5620;
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static WiFiProvider::FrequencyCount kConnectedFrequencies[] = {
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WiFiProvider::FrequencyCount(kExpectedFreq5640, 40), // 40th percentile.
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WiFiProvider::FrequencyCount(kExpectedFreq5600, 25), // 65th percentile.
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WiFiProvider::FrequencyCount(kExpectedFreq5580, 20), // 85th percentile.
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WiFiProvider::FrequencyCount(kExpectedFreq5560, 10), // 95th percentile.
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WiFiProvider::FrequencyCount(kExpectedFreq5620, 5) // 100th percentile.
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};
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static const uint16_t kExpectedFreq2432 = 2432;
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static const uint16_t kExpectedFreq2427 = 2427;
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static const uint16_t kExpectedFreq2422 = 2422;
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static const uint16_t kExpectedFreq2417 = 2417;
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static const uint16_t kExpectedFreq2412 = 2412;
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static uint16_t kUnconnectedFrequencies[] = {
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kExpectedFreq2432,
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kExpectedFreq2427,
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kExpectedFreq2422,
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kExpectedFreq2417,
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kExpectedFreq2412
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};
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static const uint16_t kNl80211FamilyId = 0x13;
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class ScanSessionTest : public Test {
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public:
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// Test set of "all the other frequencies this device can support" in
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// sorted order.
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ScanSessionTest() : weak_ptr_factory_(this) {
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WiFiProvider::FrequencyCountList default_connected_frequencies(
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kConnectedFrequencies,
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kConnectedFrequencies + arraysize(kConnectedFrequencies));
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set<uint16_t> default_unconnected_frequencies(
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kUnconnectedFrequencies,
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kUnconnectedFrequencies + arraysize(kUnconnectedFrequencies));
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BuildScanSession(default_connected_frequencies,
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default_unconnected_frequencies);
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}
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void BuildScanSession(const WiFiProvider::FrequencyCountList
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&connected_frequencies,
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const std::set<uint16_t>& unconnected_frequencies) {
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const int kArbitraryMinimum = 1;
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const int kArbitraryMaximum = std::numeric_limits<int>::max();
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scan_session_.reset(new ScanSession(&netlink_manager_,
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&dispatcher_,
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connected_frequencies,
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unconnected_frequencies,
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0,
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ScanSession::FractionList(),
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kArbitraryMinimum,
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kArbitraryMaximum,
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Bind(&ScanSessionTest::OnScanError,
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weak_ptr_factory_.GetWeakPtr()),
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nullptr));
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}
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virtual std::vector<uint16_t> GetScanFrequencies(float scan_fraction,
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size_t min_frequencies,
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size_t max_frequencies) {
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return scan_session_->GetScanFrequencies(scan_fraction, min_frequencies,
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max_frequencies);
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}
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ScanSession* scan_session() { return scan_session_.get(); }
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void SetScanSize(size_t min_frequencies, size_t max_frequencies) {
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scan_session_->min_frequencies_ = min_frequencies;
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scan_session_->max_frequencies_ = max_frequencies;
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}
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size_t GetScanFrequencyCount() {
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return arraysize(kConnectedFrequencies) +
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arraysize(kUnconnectedFrequencies);
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}
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protected:
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MOCK_METHOD0(OnScanError, void());
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MockNetlinkManager* netlink_manager() { return &netlink_manager_; }
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MockEventDispatcher* dispatcher() { return &dispatcher_; }
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MockEventDispatcher dispatcher_;
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MockNetlinkManager netlink_manager_;
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std::unique_ptr<ScanSession> scan_session_;
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base::WeakPtrFactory<ScanSessionTest> weak_ptr_factory_;
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};
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// Test that we can get a bunch of frequencies up to a specified fraction.
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TEST_F(ScanSessionTest, Fraction) {
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vector<uint16_t> result;
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// Get the first 83% of the connected values.
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{
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vector<uint16_t> expected{kExpectedFreq5640, kExpectedFreq5600,
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kExpectedFreq5580};
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result = GetScanFrequencies(.83, 1, std::numeric_limits<size_t>::max());
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EXPECT_THAT(result, ContainerEq(expected));
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EXPECT_TRUE(scan_session()->HasMoreFrequencies());
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}
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// Get the next 4 values.
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{
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vector<uint16_t> expected{kExpectedFreq5560, kExpectedFreq5620,
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kExpectedFreq2412, kExpectedFreq2417};
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result = GetScanFrequencies(ScanSession::kAllFrequencies, 1, 4);
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EXPECT_THAT(result, ContainerEq(expected));
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EXPECT_TRUE(scan_session()->HasMoreFrequencies());
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}
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// And, get the remaining list.
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{
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vector<uint16_t> expected{kExpectedFreq2422, kExpectedFreq2427,
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kExpectedFreq2432};
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result = GetScanFrequencies(ScanSession::kAllFrequencies, 20,
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std::numeric_limits<size_t>::max());
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EXPECT_THAT(result, ContainerEq(expected));
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EXPECT_FALSE(scan_session()->HasMoreFrequencies());
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}
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}
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// Test that we can get a bunch of frequencies up to a specified fraction,
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// followed by another group up to a specified fraction.
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TEST_F(ScanSessionTest, TwoFractions) {
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vector<uint16_t> result;
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// Get the first 60% of the connected values.
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{
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vector<uint16_t> expected{kExpectedFreq5640, kExpectedFreq5600};
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result = GetScanFrequencies(.60, 0, std::numeric_limits<size_t>::max());
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EXPECT_THAT(result, ContainerEq(expected));
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EXPECT_TRUE(scan_session()->HasMoreFrequencies());
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}
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// Get the next 32% of the connected values.
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{
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vector<uint16_t> expected{kExpectedFreq5580, kExpectedFreq5560};
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result = GetScanFrequencies(.32, 0, std::numeric_limits<size_t>::max());
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EXPECT_THAT(result, ContainerEq(expected));
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EXPECT_TRUE(scan_session()->HasMoreFrequencies());
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}
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// And, get the remaining list.
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{
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vector<uint16_t> expected{kExpectedFreq5620, kExpectedFreq2412,
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kExpectedFreq2417, kExpectedFreq2422, kExpectedFreq2427,
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kExpectedFreq2432};
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result = GetScanFrequencies(ScanSession::kAllFrequencies,
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std::numeric_limits<size_t>::max(),
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std::numeric_limits<size_t>::max());
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EXPECT_THAT(result, ContainerEq(expected));
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EXPECT_FALSE(scan_session()->HasMoreFrequencies());
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}
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}
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// Test that we can get a bunch of frequencies up to a minimum count, even
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// when the requested fraction has already been reached.
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TEST_F(ScanSessionTest, Min) {
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vector<uint16_t> result;
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// Get the first 3 previously seen values.
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{
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vector<uint16_t> expected{kExpectedFreq5640, kExpectedFreq5600,
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kExpectedFreq5580};
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result = GetScanFrequencies(.30, 3, std::numeric_limits<size_t>::max());
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EXPECT_THAT(result, ContainerEq(expected));
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EXPECT_TRUE(scan_session()->HasMoreFrequencies());
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}
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// Get the next value by requesting a minimum of 1.
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{
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vector<uint16_t> expected{kExpectedFreq5560};
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result = GetScanFrequencies(0.0, 1, std::numeric_limits<size_t>::max());
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EXPECT_THAT(result, ContainerEq(expected));
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EXPECT_TRUE(scan_session()->HasMoreFrequencies());
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}
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// And, get the remaining list.
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{
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vector<uint16_t> expected{kExpectedFreq5620, kExpectedFreq2412,
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kExpectedFreq2417, kExpectedFreq2422, kExpectedFreq2427,
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kExpectedFreq2432};
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result = GetScanFrequencies(ScanSession::kAllFrequencies,
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std::numeric_limits<size_t>::max(),
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std::numeric_limits<size_t>::max());
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EXPECT_THAT(result, ContainerEq(expected));
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EXPECT_FALSE(scan_session()->HasMoreFrequencies());
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}
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}
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// Test that we can get up to a specified maximum number of frequencies.
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TEST_F(ScanSessionTest, Max) {
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vector<uint16_t> result;
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// Get the first 7 values (crosses seen/unseen boundary).
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{
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vector<uint16_t> expected{kExpectedFreq5640, kExpectedFreq5600,
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kExpectedFreq5580, kExpectedFreq5560, kExpectedFreq5620,
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kExpectedFreq2412, kExpectedFreq2417};
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result = GetScanFrequencies(ScanSession::kAllFrequencies, 1, 7);
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EXPECT_THAT(result, ContainerEq(expected));
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EXPECT_TRUE(scan_session()->HasMoreFrequencies());
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}
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// And, get the remaining list.
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{
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vector<uint16_t> expected{kExpectedFreq2422, kExpectedFreq2427,
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kExpectedFreq2432};
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result = GetScanFrequencies(ScanSession::kAllFrequencies, 20,
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std::numeric_limits<size_t>::max());
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EXPECT_THAT(result, ContainerEq(expected));
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EXPECT_FALSE(scan_session()->HasMoreFrequencies());
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}
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}
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// Test that we can get exactly the seen frequencies and exactly the unseen
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// ones.
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TEST_F(ScanSessionTest, Exact) {
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vector<uint16_t> result;
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// Get the first 5 values -- exactly on the seen/unseen border.
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{
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vector<uint16_t> expected{kExpectedFreq5640, kExpectedFreq5600,
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kExpectedFreq5580, kExpectedFreq5560, kExpectedFreq5620};
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result = GetScanFrequencies(ScanSession::kAllFrequencies, 5, 5);
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EXPECT_THAT(result, ContainerEq(expected));
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EXPECT_TRUE(scan_session()->HasMoreFrequencies());
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}
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// And, get the last 5.
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{
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vector<uint16_t> expected{kExpectedFreq2412, kExpectedFreq2417,
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kExpectedFreq2422, kExpectedFreq2427, kExpectedFreq2432};
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result = GetScanFrequencies(ScanSession::kAllFrequencies, 5, 5);
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EXPECT_THAT(result, ContainerEq(expected));
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EXPECT_FALSE(scan_session()->HasMoreFrequencies());
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}
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}
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// Test that we can get everything in one read.
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TEST_F(ScanSessionTest, AllOneRead) {
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vector<uint16_t> expected{kExpectedFreq5640, kExpectedFreq5600,
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kExpectedFreq5580, kExpectedFreq5560, kExpectedFreq5620,
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kExpectedFreq2412, kExpectedFreq2417, kExpectedFreq2422,
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kExpectedFreq2427, kExpectedFreq2432};
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vector<uint16_t> result;
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result = GetScanFrequencies(ScanSession::kAllFrequencies,
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std::numeric_limits<size_t>::max(),
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std::numeric_limits<size_t>::max());
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EXPECT_THAT(result, ContainerEq(expected));
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EXPECT_FALSE(scan_session()->HasMoreFrequencies());
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}
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// Test that we can get all the previously seen frequencies (and only the
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// previously seen frequencies) via the requested fraction.
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TEST_F(ScanSessionTest, EverythingConnected) {
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vector<uint16_t> result;
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// Get the first 100% of the connected values.
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{
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vector<uint16_t> expected{kExpectedFreq5640, kExpectedFreq5600,
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kExpectedFreq5580, kExpectedFreq5560, kExpectedFreq5620};
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result = GetScanFrequencies(1.0, 0, std::numeric_limits<size_t>::max());
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EXPECT_THAT(result, ContainerEq(expected));
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EXPECT_TRUE(scan_session()->HasMoreFrequencies());
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}
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// And, get the remaining list.
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{
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vector<uint16_t> expected{kExpectedFreq2412, kExpectedFreq2417,
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kExpectedFreq2422, kExpectedFreq2427, kExpectedFreq2432};
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result = GetScanFrequencies(ScanSession::kAllFrequencies,
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std::numeric_limits<size_t>::max(),
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std::numeric_limits<size_t>::max());
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EXPECT_THAT(result, ContainerEq(expected));
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EXPECT_FALSE(scan_session()->HasMoreFrequencies());
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}
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}
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TEST_F(ScanSessionTest, OnlyPreviouslySeen) {
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// Build a scan session with only previously connected frequencies.
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WiFiProvider::FrequencyCountList default_connected_frequencies(
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kConnectedFrequencies,
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kConnectedFrequencies + arraysize(kConnectedFrequencies));
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BuildScanSession(default_connected_frequencies, std::set<uint16_t>());
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// Get the first 100% of the connected values.
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vector<uint16_t> expected{kExpectedFreq5640, kExpectedFreq5600,
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kExpectedFreq5580, kExpectedFreq5560, kExpectedFreq5620};
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vector<uint16_t> result;
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result = GetScanFrequencies(ScanSession::kAllFrequencies, 1,
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std::numeric_limits<size_t>::max());
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EXPECT_THAT(result, ContainerEq(expected));
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EXPECT_FALSE(scan_session()->HasMoreFrequencies());
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result = GetScanFrequencies(ScanSession::kAllFrequencies,
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std::numeric_limits<size_t>::max(),
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std::numeric_limits<size_t>::max());
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EXPECT_TRUE(result.empty());
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}
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// Verify that max works inside the list of connected frequencies.
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TEST_F(ScanSessionTest, MaxAppliesToConnected) {
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vector<uint16_t> result;
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{
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vector<uint16_t> expected{kExpectedFreq5640, kExpectedFreq5600,
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kExpectedFreq5580};
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result = GetScanFrequencies(ScanSession::kAllFrequencies, 1, 3);
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EXPECT_THAT(result, ContainerEq(expected));
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EXPECT_TRUE(scan_session()->HasMoreFrequencies());
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}
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{
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vector<uint16_t> expected{kExpectedFreq5560, kExpectedFreq5620,
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kExpectedFreq2412};
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result = GetScanFrequencies(ScanSession::kAllFrequencies, 1, 3);
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EXPECT_THAT(result, ContainerEq(expected));
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EXPECT_TRUE(scan_session()->HasMoreFrequencies());
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}
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{
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vector<uint16_t> expected{kExpectedFreq2417, kExpectedFreq2422,
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kExpectedFreq2427};
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result = GetScanFrequencies(ScanSession::kAllFrequencies, 1, 3);
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EXPECT_THAT(result, ContainerEq(expected));
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EXPECT_TRUE(scan_session()->HasMoreFrequencies());
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}
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{
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vector<uint16_t> expected{kExpectedFreq2432};
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result = GetScanFrequencies(ScanSession::kAllFrequencies, 1, 3);
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EXPECT_THAT(result, ContainerEq(expected));
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EXPECT_FALSE(scan_session()->HasMoreFrequencies());
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}
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}
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// Test that we can get each value individually.
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TEST_F(ScanSessionTest, IndividualReads) {
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vector<uint16_t> result;
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static const float kArbitraryFraction = 0.83;
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{
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vector<uint16_t> expected{kExpectedFreq5640};
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result = GetScanFrequencies(kArbitraryFraction, 1, 1);
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EXPECT_THAT(result, ContainerEq(expected));
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EXPECT_TRUE(scan_session()->HasMoreFrequencies());
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}
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{
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vector<uint16_t> expected{kExpectedFreq5600};
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result = GetScanFrequencies(kArbitraryFraction, 1, 1);
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EXPECT_THAT(result, ContainerEq(expected));
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EXPECT_TRUE(scan_session()->HasMoreFrequencies());
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}
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{
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vector<uint16_t> expected{kExpectedFreq5580};
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result = GetScanFrequencies(kArbitraryFraction, 1, 1);
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EXPECT_THAT(result, ContainerEq(expected));
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EXPECT_TRUE(scan_session()->HasMoreFrequencies());
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}
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{
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vector<uint16_t> expected{kExpectedFreq5560};
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result = GetScanFrequencies(kArbitraryFraction, 1, 1);
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EXPECT_THAT(result, ContainerEq(expected));
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EXPECT_TRUE(scan_session()->HasMoreFrequencies());
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}
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{
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vector<uint16_t> expected{kExpectedFreq5620};
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result = GetScanFrequencies(kArbitraryFraction, 1, 1);
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EXPECT_THAT(result, ContainerEq(expected));
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EXPECT_TRUE(scan_session()->HasMoreFrequencies());
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}
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{
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vector<uint16_t> expected{kExpectedFreq2412};
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result = GetScanFrequencies(kArbitraryFraction, 1, 1);
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EXPECT_THAT(result, ContainerEq(expected));
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EXPECT_TRUE(scan_session()->HasMoreFrequencies());
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}
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{
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vector<uint16_t> expected{kExpectedFreq2417};
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result = GetScanFrequencies(kArbitraryFraction, 1, 1);
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EXPECT_THAT(result, ContainerEq(expected));
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EXPECT_TRUE(scan_session()->HasMoreFrequencies());
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}
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{
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vector<uint16_t> expected{kExpectedFreq2422};
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result = GetScanFrequencies(kArbitraryFraction, 1, 1);
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EXPECT_THAT(result, ContainerEq(expected));
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EXPECT_TRUE(scan_session()->HasMoreFrequencies());
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}
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{
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vector<uint16_t> expected{kExpectedFreq2427};
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result = GetScanFrequencies(kArbitraryFraction, 1, 1);
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EXPECT_THAT(result, ContainerEq(expected));
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EXPECT_TRUE(scan_session()->HasMoreFrequencies());
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}
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{
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vector<uint16_t> expected{kExpectedFreq2432};
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result = GetScanFrequencies(kArbitraryFraction, 1, 1);
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EXPECT_THAT(result, ContainerEq(expected));
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EXPECT_FALSE(scan_session()->HasMoreFrequencies());
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}
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}
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TEST_F(ScanSessionTest, OnTriggerScanResponse) {
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Nl80211Message::SetMessageType(kNl80211FamilyId);
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EXPECT_CALL(*netlink_manager(), SendNl80211Message(
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IsNl80211Command(kNl80211FamilyId, NL80211_CMD_TRIGGER_SCAN), _, _, _));
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|
scan_session()->InitiateScan();
|
|
|
|
EXPECT_CALL(*this, OnScanError());
|
|
NewScanResultsMessage not_supposed_to_get_this_message;
|
|
scan_session()->OnTriggerScanResponse(not_supposed_to_get_this_message);
|
|
}
|
|
|
|
TEST_F(ScanSessionTest, ExhaustFrequencies) {
|
|
// Set min & max scan frequency count to 1 so each scan will be of a single
|
|
// frequency.
|
|
SetScanSize(1, 1);
|
|
|
|
// Perform all the progressive scans until the frequencies are exhausted.
|
|
for (size_t i = 0; i < GetScanFrequencyCount(); ++i) {
|
|
EXPECT_TRUE(scan_session()->HasMoreFrequencies());
|
|
EXPECT_CALL(*netlink_manager(), SendNl80211Message(
|
|
IsNl80211Command(kNl80211FamilyId, NL80211_CMD_TRIGGER_SCAN), _, _, _));
|
|
scan_session()->InitiateScan();
|
|
}
|
|
|
|
EXPECT_FALSE(scan_session()->HasMoreFrequencies());
|
|
EXPECT_CALL(*netlink_manager(), SendNl80211Message(
|
|
IsNl80211Command(kNl80211FamilyId, NL80211_CMD_TRIGGER_SCAN), _, _, _))
|
|
.Times(0);
|
|
scan_session()->InitiateScan();
|
|
}
|
|
|
|
TEST_F(ScanSessionTest, OnError) {
|
|
Nl80211Message::SetMessageType(kNl80211FamilyId);
|
|
|
|
EXPECT_CALL(*netlink_manager(), SendNl80211Message(
|
|
IsNl80211Command(kNl80211FamilyId, NL80211_CMD_TRIGGER_SCAN), _, _, _));
|
|
scan_session()->InitiateScan();
|
|
|
|
EXPECT_CALL(*this, OnScanError());
|
|
ErrorAckMessage error_message(-EINTR);
|
|
scan_session()->OnTriggerScanErrorResponse(NetlinkManager::kErrorFromKernel,
|
|
&error_message);
|
|
}
|
|
|
|
TEST_F(ScanSessionTest, EBusy) {
|
|
const size_t kSmallRetryNumber = 3;
|
|
Nl80211Message::SetMessageType(kNl80211FamilyId);
|
|
scan_session()->scan_tries_left_ = kSmallRetryNumber;
|
|
|
|
EXPECT_CALL(*netlink_manager(), SendNl80211Message(
|
|
IsNl80211Command(kNl80211FamilyId, NL80211_CMD_TRIGGER_SCAN), _, _, _));
|
|
scan_session()->InitiateScan();
|
|
|
|
ErrorAckMessage error_message(-EBUSY);
|
|
for (size_t i = 0; i < kSmallRetryNumber; ++i) {
|
|
EXPECT_CALL(*this, OnScanError()).Times(0);
|
|
EXPECT_CALL(*dispatcher(), PostDelayedTask(_, _));
|
|
scan_session()->OnTriggerScanErrorResponse(NetlinkManager::kErrorFromKernel,
|
|
&error_message);
|
|
}
|
|
|
|
EXPECT_CALL(*this, OnScanError());
|
|
scan_session()->OnTriggerScanErrorResponse(NetlinkManager::kErrorFromKernel,
|
|
&error_message);
|
|
}
|
|
|
|
TEST_F(ScanSessionTest, ScanHidden) {
|
|
scan_session_->AddSsid(ByteString("a", 1));
|
|
EXPECT_CALL(netlink_manager_,
|
|
SendNl80211Message(HasHiddenSSID(kNl80211FamilyId), _, _, _));
|
|
scan_session()->InitiateScan();
|
|
}
|
|
|
|
TEST_F(ScanSessionTest, ScanNoHidden) {
|
|
EXPECT_CALL(netlink_manager_,
|
|
SendNl80211Message(HasNoHiddenSSID(kNl80211FamilyId), _, _, _));
|
|
scan_session()->InitiateScan();
|
|
}
|
|
|
|
} // namespace shill
|