Seperate LatencyStatistics from InputReader
Test: atest LatencyStatisticsTest
Change-Id: I22a39cd5bef7fa9180bc1ee1fd9478a2cf872e83
diff --git a/libs/input/tests/LatencyStatistics_test.cpp b/libs/input/tests/LatencyStatistics_test.cpp
new file mode 100644
index 0000000..6d1cab4
--- /dev/null
+++ b/libs/input/tests/LatencyStatistics_test.cpp
@@ -0,0 +1,72 @@
+/*
+ * Copyright (C) 2019 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 <input/LatencyStatistics.h>
+#include <cmath>
+#include <limits>
+
+namespace android {
+namespace test {
+
+TEST(LatencyStatisticsTest, ResetStats) {
+ LatencyStatistics stats{5min};
+ stats.addValue(5.0);
+ stats.addValue(19.3);
+ stats.addValue(20);
+ stats.reset();
+
+ ASSERT_EQ(stats.getCount(), 0u);
+ ASSERT_EQ(std::isnan(stats.getStDev()), true);
+ ASSERT_EQ(std::isnan(stats.getMean()), true);
+}
+
+TEST(LatencyStatisticsTest, AddStatsValue) {
+ LatencyStatistics stats{5min};
+ stats.addValue(5.0);
+
+ ASSERT_EQ(stats.getMin(), 5.0);
+ ASSERT_EQ(stats.getMax(), 5.0);
+ ASSERT_EQ(stats.getCount(), 1u);
+ ASSERT_EQ(stats.getMean(), 5.0);
+ ASSERT_EQ(stats.getStDev(), 0.0);
+}
+
+TEST(LatencyStatisticsTest, AddMultipleStatsValue) {
+ LatencyStatistics stats{5min};
+ stats.addValue(4.0);
+ stats.addValue(6.0);
+ stats.addValue(8.0);
+ stats.addValue(10.0);
+
+ float stdev = stats.getStDev();
+
+ ASSERT_EQ(stats.getMin(), 4.0);
+ ASSERT_EQ(stats.getMax(), 10.0);
+ ASSERT_EQ(stats.getCount(), 4u);
+ ASSERT_EQ(stats.getMean(), 7.0);
+ ASSERT_EQ(stdev * stdev, 5.0);
+}
+
+TEST(LatencyStatisticsTest, ShouldReportStats) {
+ LatencyStatistics stats{0min};
+ stats.addValue(5.0);
+
+ ASSERT_EQ(stats.shouldReport(), true);
+}
+
+} // namespace test
+} // namespace android
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