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/*
* 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.
*/
#include <gtest/gtest.h>
#include <media/EventMetric.h>
namespace android {
/**
* Unit tests for the EventMetric class.
*/
TEST(EventMetricTest, IntDataTypeEmpty) {
EventMetric<int> metric("MyMetricName", "MetricAttributeName");
std::map<int, EventStatistics> values;
metric.ExportValues(
[&] (int attribute_value, const EventStatistics& value) {
values[attribute_value] = value;
});
EXPECT_TRUE(values.empty());
}
TEST(EventMetricTest, IntDataType) {
EventMetric<int> metric("MyMetricName", "MetricAttributeName");
std::map<int, EventStatistics> values;
metric.Record(4, 7);
metric.Record(5, 8);
metric.Record(5, 8);
metric.Record(5, 8);
metric.Record(6, 8);
metric.Record(6, 8);
metric.Record(6, 8);
metric.ExportValues(
[&] (int attribute_value, const EventStatistics& value) {
values[attribute_value] = value;
});
ASSERT_EQ(2u, values.size());
EXPECT_EQ(4, values[7].min);
EXPECT_EQ(4, values[7].max);
EXPECT_EQ(4, values[7].mean);
EXPECT_EQ(1, values[7].count);
EXPECT_EQ(5, values[8].min);
EXPECT_EQ(6, values[8].max);
// This is an approximate value because of the technique we're using.
EXPECT_NEAR(5.5, values[8].mean, 0.2);
EXPECT_EQ(6, values[8].count);
}
TEST(EventMetricTest, StringDataType) {
EventMetric<std::string> metric("MyMetricName", "MetricAttributeName");
std::map<std::string, EventStatistics> values;
metric.Record(1, "a");
metric.Record(2, "b");
metric.Record(2, "b");
metric.Record(3, "b");
metric.Record(3, "b");
metric.ExportValues(
[&] (std::string attribute_value, const EventStatistics& value) {
values[attribute_value] = value;
});
ASSERT_EQ(2u, values.size());
EXPECT_EQ(1, values["a"].min);
EXPECT_EQ(1, values["a"].max);
EXPECT_EQ(1, values["a"].mean);
EXPECT_EQ(1, values["a"].count);
EXPECT_EQ(2, values["b"].min);
EXPECT_EQ(3, values["b"].max);
EXPECT_NEAR(2.5, values["b"].mean, 0.2);
EXPECT_EQ(4, values["b"].count);
}
// Helper class that allows us to mock the clock.
template<typename AttributeType>
class MockEventTimer : public EventTimer<AttributeType> {
public:
explicit MockEventTimer(nsecs_t time_delta_ns,
EventMetric<AttributeType>* metric)
: EventTimer<AttributeType>(metric) {
// Pretend the event started earlier.
this->start_time_ = systemTime() - time_delta_ns;
}
};
TEST(EventTimerTest, IntDataType) {
EventMetric<int> metric("MyMetricName", "MetricAttributeName");
for (int i = 0; i < 5; i++) {
{
// Add a mock time delta.
MockEventTimer<int> metric_timer(i * 1000000, &metric);
metric_timer.SetAttribute(i % 2);
}
}
std::map<int, EventStatistics> values;
metric.ExportValues(
[&] (int attribute_value, const EventStatistics& value) {
values[attribute_value] = value;
});
ASSERT_EQ(2u, values.size());
EXPECT_LT(values[0].min, values[0].max);
EXPECT_GE(4000, values[0].max);
EXPECT_GT(values[0].mean, values[0].min);
EXPECT_LE(values[0].mean, values[0].max);
EXPECT_EQ(3, values[0].count);
EXPECT_LT(values[1].min, values[1].max);
EXPECT_GE(3000, values[1].max);
EXPECT_GT(values[1].mean, values[1].min);
EXPECT_LE(values[1].mean, values[1].max);
EXPECT_EQ(2, values[1].count);
}
} // namespace android