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// Copyright 2014 The Flutter Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
import 'dart:ui';
import 'package:flutter_test/flutter_test.dart';
void main() {
group(FrameTimingSummarizer, () {
test('calculates all fields', () {
List<int> vsyncTimes = <int>[
for (int i = 0; i < 100; i += 1) 100 * (i + 1),
];
List<int> buildTimes = <int>[
for (int i = 0; i < 100; i += 1) vsyncTimes[i] + 1000 * (i + 1),
];
List<int> rasterTimes = <int>[
for (int i = 0; i < 100; i += 1) 1000 * (i + 1) + 1000,
];
// reversed to make sure sort is working.
buildTimes = buildTimes.reversed.toList();
rasterTimes = rasterTimes.reversed.toList();
vsyncTimes = vsyncTimes.reversed.toList();
final List<FrameTiming> inputData = <FrameTiming>[
for (int i = 0; i < 100; i += 1)
FrameTiming(
vsyncStart: 0,
buildStart: vsyncTimes[i],
buildFinish: buildTimes[i],
rasterStart: 500,
rasterFinish: rasterTimes[i],
// Wall time should not be used in any profiling metrics.
// It is primarily to correlate with external tools' measurement.
rasterFinishWallTime: 0,
),
];
final FrameTimingSummarizer summary = FrameTimingSummarizer(inputData);
expect(summary.averageFrameBuildTime.inMicroseconds, 50500);
expect(summary.p90FrameBuildTime.inMicroseconds, 90000);
expect(summary.p99FrameBuildTime.inMicroseconds, 99000);
expect(summary.worstFrameBuildTime.inMicroseconds, 100000);
expect(summary.missedFrameBuildBudget, 84);
expect(summary.averageFrameRasterizerTime.inMicroseconds, 51000);
expect(summary.p90FrameRasterizerTime.inMicroseconds, 90500);
expect(summary.p99FrameRasterizerTime.inMicroseconds, 99500);
expect(summary.worstFrameRasterizerTime.inMicroseconds, 100500);
expect(summary.missedFrameRasterizerBudget, 85);
expect(summary.frameBuildTime.length, 100);
expect(summary.averageVsyncOverhead.inMicroseconds, 5050);
expect(summary.p90VsyncOverhead.inMicroseconds, 9000);
expect(summary.p99VsyncOverhead.inMicroseconds, 9900);
expect(summary.worstVsyncOverhead.inMicroseconds, 10000);
});
group('missed budget count', () {
test('when single element missed budget', () {
final FrameTimingSummarizer summary = FrameTimingSummarizer(<FrameTiming>[
FrameTiming(
buildStart: 0,
buildFinish: (kBuildBudget + const Duration(microseconds: 1)).inMicroseconds,
vsyncStart: 0,
rasterStart: 0,
rasterFinish: 0,
rasterFinishWallTime: 0,
),
]);
expect(summary.missedFrameBuildBudget, 1);
});
test('when single element within budget', () {
final FrameTimingSummarizer summary = FrameTimingSummarizer(<FrameTiming>[
FrameTiming(
buildStart: 0,
buildFinish: 0,
vsyncStart: 0,
rasterStart: 0,
rasterFinish: 0,
rasterFinishWallTime: 0,
),
]);
expect(summary.missedFrameBuildBudget, 0);
});
test('when single element exactly within budget', () {
final FrameTimingSummarizer summary = FrameTimingSummarizer(<FrameTiming>[
FrameTiming(
buildStart: 0,
buildFinish: kBuildBudget.inMicroseconds,
vsyncStart: 0,
rasterStart: 0,
rasterFinish: 0,
rasterFinishWallTime: 0,
),
]);
expect(summary.missedFrameBuildBudget, 0);
});
test('when many missed budget', () {
final FrameTimingSummarizer summary = FrameTimingSummarizer(<FrameTiming>[
FrameTiming(
buildStart: 0,
buildFinish: 0,
vsyncStart: 0,
rasterStart: 0,
rasterFinish: 0,
rasterFinishWallTime: 0,
),
FrameTiming(
buildStart: 0,
buildFinish: kBuildBudget.inMicroseconds,
vsyncStart: 0,
rasterStart: 0,
rasterFinish: 0,
rasterFinishWallTime: 0,
),
FrameTiming(
buildStart: 0,
buildFinish: (kBuildBudget + const Duration(microseconds: 1)).inMicroseconds,
vsyncStart: 0,
rasterStart: 0,
rasterFinish: 0,
rasterFinishWallTime: 0,
),
FrameTiming(
buildStart: 0,
buildFinish: (kBuildBudget + const Duration(microseconds: 2)).inMicroseconds,
vsyncStart: 0,
rasterStart: 0,
rasterFinish: 0,
rasterFinishWallTime: 0,
),
]);
expect(summary.missedFrameBuildBudget, 2);
});
});
});
}