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108 lines
3.6 KiB
108 lines
3.6 KiB
/*
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* Copyright (C) 2017 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 "gtest/gtest.h"
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#include "chre/apps/wifi_offload/channel_histogram.h"
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#include "include/random_generator.h"
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#include "include/utility.h"
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using wifi_offload_test::kAllChannels_Test;
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using wifi_offload_test::kAllFrequencies_Test;
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using wifi_offload_test::kNumFrequencies_Test;
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/**
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* This file includes all the unit tests for ChannelHistogram class, except ==
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* operator and serialize/deserialize functions which have already been covered
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* in offloadtypes_test.cc.
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*/
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class ChannelHistogramTest : public testing::Test {
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public:
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wifi_offload_test::RandomGenerator random_gen_;
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wifi_offload::ChannelHistogram channel_histo_;
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};
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TEST_F(ChannelHistogramTest, UnsupportedFrequencyAndchannel_numbersAreHandled) {
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// some unsupported frequencies
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channel_histo_.IncrementScanCountForFrequency(2000);
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channel_histo_.IncrementScanCountForFrequency(42000);
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// verify no count have been increased
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for (size_t i = 0; i < kNumFrequencies_Test; i++) {
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ASSERT_EQ(0, channel_histo_.GetChannelScanCount(kAllChannels_Test[i]));
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}
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// some unsupported channel numbers
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EXPECT_EQ(0, channel_histo_.GetChannelScanCount(0));
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EXPECT_EQ(0, channel_histo_.GetChannelScanCount(15));
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EXPECT_EQ(0, channel_histo_.GetChannelScanCount(200));
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}
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TEST_F(ChannelHistogramTest, FrequenciesMapCorrectlyTochannel_numbers) {
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for (size_t i = 0; i < kNumFrequencies_Test; i++) {
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wifi_offload::ChannelHistogram histo;
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histo.IncrementScanCountForFrequency(kAllFrequencies_Test[i]);
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// verify only the increase channel is non-zero
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for (size_t j = 0; j < kNumFrequencies_Test; j++) {
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EXPECT_EQ(kAllChannels_Test[i] == kAllChannels_Test[j] ? 255 : 0,
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histo.GetChannelScanCount(kAllChannels_Test[j]));
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}
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}
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}
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TEST_F(ChannelHistogramTest, IncreaseFrequencyScanCountAndGetChannelScanCount) {
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uint32_t increase = 1;
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for (size_t i = 0; i < 12; i++) {
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increase *= 2;
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channel_histo_.IncrementScanCountForFrequencyForTest(
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kAllFrequencies_Test[i], increase);
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}
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uint32_t expected = 1;
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for (size_t i = 0; i < 12; i++) {
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uint8_t scaled_value =
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channel_histo_.GetChannelScanCount(kAllChannels_Test[i]);
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expected *= 2;
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EXPECT_EQ(expected * 254 / increase + 1, scaled_value);
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}
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for (size_t i = 12; i < 14; i++) {
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EXPECT_EQ(0, channel_histo_.GetChannelScanCount(kAllChannels_Test[i]));
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}
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}
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TEST_F(ChannelHistogramTest, SetScanCountToMaxUInt32) {
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// add some nice scan counts
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uint32_t increase = 1;
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for (size_t i = 0; i < 12; i++) {
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increase *= 2;
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channel_histo_.IncrementScanCountForFrequencyForTest(
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kAllFrequencies_Test[i], increase);
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}
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/* set the next scan count to be 2 ^ 32 - 1, this will force all other counts
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* to get mapped to 1 */
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channel_histo_.IncrementScanCountForFrequencyForTest(kAllFrequencies_Test[12],
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0xffffffff);
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for (size_t i = 0; i < 12; i++) {
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EXPECT_EQ(1, channel_histo_.GetChannelScanCount(kAllChannels_Test[i]));
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}
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EXPECT_EQ(255, channel_histo_.GetChannelScanCount(kAllChannels_Test[12]));
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}
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