269 lines
9.0 KiB
C++
269 lines
9.0 KiB
C++
/*
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* Copyright (C) 2021 The Android Open Source Project
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* Android BPF library - public API
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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 "MultiStateCounter.h"
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namespace android {
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namespace battery {
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typedef MultiStateCounter<double> DoubleMultiStateCounter;
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template <>
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bool DoubleMultiStateCounter::delta(const double& previousValue, const double& newValue,
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double* outValue) const {
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*outValue = newValue - previousValue;
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return *outValue >= 0;
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}
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template <>
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void DoubleMultiStateCounter::add(double* value1, const double& value2, const uint64_t numerator,
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const uint64_t denominator) const {
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if (numerator != denominator) {
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// The caller ensures that denominator != 0
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*value1 += value2 * numerator / denominator;
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} else {
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*value1 += value2;
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}
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}
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template <>
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std::string DoubleMultiStateCounter::valueToString(const double& v) const {
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return std::to_string(v);
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}
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class MultiStateCounterTest : public testing::Test {};
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TEST_F(MultiStateCounterTest, constructor) {
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DoubleMultiStateCounter testCounter(3, 0);
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testCounter.updateValue(0, 0);
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testCounter.setState(1, 0);
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double delta = testCounter.updateValue(3.14, 3000);
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EXPECT_DOUBLE_EQ(0, testCounter.getCount(0));
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EXPECT_DOUBLE_EQ(3.14, testCounter.getCount(1));
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EXPECT_DOUBLE_EQ(0, testCounter.getCount(2));
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EXPECT_DOUBLE_EQ(3.14, delta);
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}
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TEST_F(MultiStateCounterTest, stateChange) {
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DoubleMultiStateCounter testCounter(3, 0);
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testCounter.updateValue(0, 0);
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testCounter.setState(1, 0);
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testCounter.setState(2, 1000);
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testCounter.updateValue(6.0, 3000);
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EXPECT_DOUBLE_EQ(0, testCounter.getCount(0));
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EXPECT_DOUBLE_EQ(2.0, testCounter.getCount(1));
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EXPECT_DOUBLE_EQ(4.0, testCounter.getCount(2));
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}
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TEST_F(MultiStateCounterTest, setEnabled) {
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DoubleMultiStateCounter testCounter(3, 0);
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testCounter.updateValue(0, 0);
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testCounter.setState(1, 0);
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testCounter.setEnabled(false, 1000);
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testCounter.setState(2, 2000);
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testCounter.updateValue(6.0, 3000);
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// In state 1: accumulated 1000 before disabled, that's 6.0 * 1000/3000 = 2.0
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// In state 2: 0, since it is still disabled
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EXPECT_DOUBLE_EQ(0, testCounter.getCount(0));
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EXPECT_DOUBLE_EQ(2.0, testCounter.getCount(1));
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EXPECT_DOUBLE_EQ(0, testCounter.getCount(2));
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// Should have no effect since the counter is disabled
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testCounter.setState(0, 3500);
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// Should have no effect since the counter is disabled
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testCounter.updateValue(10.0, 4000);
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EXPECT_DOUBLE_EQ(0, testCounter.getCount(0));
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EXPECT_DOUBLE_EQ(2.0, testCounter.getCount(1));
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EXPECT_DOUBLE_EQ(0, testCounter.getCount(2));
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testCounter.setState(2, 4500);
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// Enable the counter to partially accumulate deltas for the current state, 2
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testCounter.setEnabled(true, 5000);
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testCounter.setEnabled(false, 6000);
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testCounter.setEnabled(true, 7000);
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testCounter.updateValue(20.0, 8000);
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// The delta is 10.0 over 5000-3000=2000.
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// Counter has been enabled in state 2 for (6000-5000)+(8000-7000) = 2000,
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// so its share is (20.0-10.0) * 2000/(8000-4000) = 5.0
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EXPECT_DOUBLE_EQ(0, testCounter.getCount(0));
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EXPECT_DOUBLE_EQ(2.0, testCounter.getCount(1));
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EXPECT_DOUBLE_EQ(5.0, testCounter.getCount(2));
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testCounter.reset();
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testCounter.setState(0, 0);
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testCounter.updateValue(0, 0);
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testCounter.setState(1, 2000);
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testCounter.setEnabled(false, 3000);
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testCounter.updateValue(200, 5000);
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// 200 over 5000 = 40 per second
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// Counter was in state 0 from 0 to 2000, so 2 sec, so the count should be 40 * 2 = 80
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// It stayed in state 1 from 2000 to 3000, at which point the counter was disabled,
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// so the count for state 1 should be 40 * 1 = 40.
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// The remaining 2 seconds from 3000 to 5000 don't count because the counter was disabled.
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EXPECT_DOUBLE_EQ(80.0, testCounter.getCount(0));
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EXPECT_DOUBLE_EQ(40.0, testCounter.getCount(1));
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EXPECT_DOUBLE_EQ(0, testCounter.getCount(2));
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}
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TEST_F(MultiStateCounterTest, reset) {
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DoubleMultiStateCounter testCounter(3, 0);
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testCounter.updateValue(0, 0);
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testCounter.setState(1, 0);
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testCounter.updateValue(2.72, 3000);
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testCounter.reset();
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EXPECT_DOUBLE_EQ(0, testCounter.getCount(0));
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EXPECT_DOUBLE_EQ(0, testCounter.getCount(1));
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EXPECT_DOUBLE_EQ(0, testCounter.getCount(2));
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// Assert that we can still continue accumulating after a reset
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testCounter.updateValue(0, 4000);
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testCounter.updateValue(3.14, 5000);
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EXPECT_DOUBLE_EQ(0, testCounter.getCount(0));
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EXPECT_DOUBLE_EQ(3.14, testCounter.getCount(1));
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EXPECT_DOUBLE_EQ(0, testCounter.getCount(2));
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}
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TEST_F(MultiStateCounterTest, timeAdjustment_setState) {
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DoubleMultiStateCounter testCounter(3, 0);
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testCounter.updateValue(0, 0);
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testCounter.setState(1, 0);
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testCounter.setState(2, 2000);
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// Time moves back
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testCounter.setState(1, 1000);
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testCounter.updateValue(6.0, 3000);
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EXPECT_DOUBLE_EQ(0, testCounter.getCount(0));
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// We were in state 1 from 0 to 2000, which was erased because the time moved back.
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// Then from 1000 to 3000, so we expect the count to be 6 * (2000/3000)
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EXPECT_DOUBLE_EQ(4.0, testCounter.getCount(1));
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// No time was effectively accumulated for state 2, because the timestamp moved back
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// while we were in state 2.
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EXPECT_DOUBLE_EQ(0, testCounter.getCount(2));
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}
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TEST_F(MultiStateCounterTest, timeAdjustment_updateValue) {
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DoubleMultiStateCounter testCounter(1, 0);
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testCounter.updateValue(0, 0);
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testCounter.setState(0, 0);
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testCounter.updateValue(6.0, 2000);
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// Time moves back. The delta over the negative interval from 2000 to 1000 is ignored
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testCounter.updateValue(8.0, 1000);
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double delta = testCounter.updateValue(11.0, 3000);
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// The total accumulated count is:
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// 6.0 // For the period 0-2000
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// +(11.0-8.0) // For the period 1000-3000
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EXPECT_DOUBLE_EQ(9.0, testCounter.getCount(0));
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// 11.0-8.0
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EXPECT_DOUBLE_EQ(3.0, delta);
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}
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TEST_F(MultiStateCounterTest, updateValue_nonmonotonic) {
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DoubleMultiStateCounter testCounter(2, 0);
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testCounter.updateValue(0, 0);
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testCounter.setState(0, 0);
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testCounter.updateValue(6.0, 2000);
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// Value goes down. The negative delta from 6.0 to 4.0 is ignored
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testCounter.updateValue(4.0, 3000);
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// Value goes up again. The positive delta from 4.0 to 7.0 is accumulated.
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double delta = testCounter.updateValue(7.0, 4000);
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// The total accumulated count is:
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// 6.0 // For the period 0-2000
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// +(7.0-4.0) // For the period 3000-4000
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EXPECT_DOUBLE_EQ(9.0, testCounter.getCount(0));
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// 7.0-4.0
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EXPECT_DOUBLE_EQ(3.0, delta);
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}
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TEST_F(MultiStateCounterTest, incrementValue) {
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DoubleMultiStateCounter testCounter(2, 0);
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testCounter.updateValue(0, 0);
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testCounter.setState(0, 0);
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testCounter.updateValue(6.0, 2000);
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testCounter.setState(1, 3000);
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testCounter.incrementValue(8.0, 6000);
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// The total accumulated count is:
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// 6.0 // For the period 0-2000
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// +(8.0 * 0.25) // For the period 3000-4000
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EXPECT_DOUBLE_EQ(8.0, testCounter.getCount(0));
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// 0 // For the period 0-3000
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// +(8.0 * 0.75) // For the period 3000-4000
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EXPECT_DOUBLE_EQ(6.0, testCounter.getCount(1));
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}
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TEST_F(MultiStateCounterTest, addValue) {
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DoubleMultiStateCounter testCounter(1, 0);
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testCounter.updateValue(0, 0);
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testCounter.setState(0, 0);
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testCounter.updateValue(6.0, 2000);
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testCounter.addValue(8.0);
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EXPECT_DOUBLE_EQ(14.0, testCounter.getCount(0));
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testCounter.setEnabled(false, 3000);
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testCounter.addValue(888.0);
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EXPECT_DOUBLE_EQ(14.0, testCounter.getCount(0));
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}
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TEST_F(MultiStateCounterTest, toString) {
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DoubleMultiStateCounter testCounter(2, 0);
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EXPECT_STREQ("[0: 0.000000, 1: 0.000000] currentState: none", testCounter.toString().c_str());
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testCounter.updateValue(0, 0);
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testCounter.setState(1, 0);
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testCounter.setState(1, 2000);
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EXPECT_STREQ("[0: 0.000000, 1: 0.000000 timeInStateSinceUpdate: 2000]"
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" updated: 0 currentState: 1 stateChanged: 2000",
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testCounter.toString().c_str());
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testCounter.updateValue(3.14, 3000);
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EXPECT_STREQ("[0: 0.000000, 1: 3.140000] updated: 3000 currentState: 1",
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testCounter.toString().c_str());
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}
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} // namespace battery
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} // namespace android
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