wehub-resource-sync
69 lines
2.4 KiB
C#
69 lines
2.4 KiB
C#
using Xunit;
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namespace T3.VideoServices.Tests;
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public class TimeToFrameMapperTests
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{
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[Theory]
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[InlineData(7.0, 5.0, 2.0)] // wraps past the end
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[InlineData(-1.0, 5.0, 4.0)] // negative wraps forward
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[InlineData(0.0, 5.0, 0.0)]
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[InlineData(5.0, 5.0, 0.0)] // exactly one period wraps to 0
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public void ResolvePlaybackSeconds_Loop_Wraps(double requested, double duration, double expected)
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{
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Assert.Equal(expected, TimeToFrameMapper.ResolvePlaybackSeconds(requested, duration, loop: true), 6);
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}
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[Theory]
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[InlineData(7.0, 5.0, 5.0)] // clamps to last
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[InlineData(-1.0, 5.0, 0.0)] // clamps to first
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[InlineData(3.0, 5.0, 3.0)]
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public void ResolvePlaybackSeconds_NoLoop_Clamps(double requested, double duration, double expected)
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{
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Assert.Equal(expected, TimeToFrameMapper.ResolvePlaybackSeconds(requested, duration, loop: false), 6);
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}
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[Fact]
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public void ResolvePlaybackSeconds_ZeroDuration_IsSafe()
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{
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Assert.Equal(0.0, TimeToFrameMapper.ResolvePlaybackSeconds(3.0, 0.0, loop: true));
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Assert.Equal(0.0, TimeToFrameMapper.ResolvePlaybackSeconds(3.0, 0.0, loop: false));
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}
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[Theory]
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[InlineData(2.0, 0, 1, 60000, 120000)]
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[InlineData(2.0, 0, 1, 30000, 60000)]
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[InlineData(0.0, 0, 1, 60000, 0)]
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[InlineData(1.0, 1000, 1, 60000, 61000)] // start-time offset is added
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public void SecondsToPts_FloorsToGrid(double seconds, long start, int num, int den, long expected)
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{
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Assert.Equal(expected, TimeToFrameMapper.SecondsToPts(seconds, start, num, den));
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}
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[Fact]
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public void SecondsToPts_IsDeterministicAndMonotonic()
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{
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long Prev = long.MinValue;
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for (var s = 0.0; s < 5.0; s += 0.013)
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{
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var a = TimeToFrameMapper.SecondsToPts(s, 0, 1, 60000);
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var b = TimeToFrameMapper.SecondsToPts(s, 0, 1, 60000);
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Assert.Equal(a, b); // same input → same output
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Assert.True(a >= Prev); // non-decreasing in time
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Prev = a;
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}
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}
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[Fact]
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public void PtsToSeconds_RoundTripsWithinOneFrame()
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{
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const int num = 1, den = 60000;
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for (var s = 0.1; s < 5.0; s += 0.37)
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{
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var pts = TimeToFrameMapper.SecondsToPts(s, 0, num, den);
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var back = TimeToFrameMapper.PtsToSeconds(pts, 0, num, den);
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Assert.True(Math.Abs(back - s) <= num / (double)den, $"{back} vs {s}");
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}
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}
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}
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