Add more tests around time travel
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@ -31,15 +31,18 @@ public class TimeTravelTest
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World world = setup.UpdateWorld();
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World world = setup.UpdateWorld();
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// Confirm that there are now three seasons: the root, a future off the root, and a fork.
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// Confirm that there are now four seasons: three in the main timeline and one in a fork.
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Assert.That(world.Seasons.Count, Is.EqualTo(3));
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Assert.That(
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Assert.That(world.Seasons.Where(s => s.Timeline != s0.Timeline).Count(), Is.EqualTo(1));
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world.Seasons.Where(s => s.Timeline == s0.Timeline).Count(),
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Season fork = world.Seasons.Where(s => s.Timeline != s0.Timeline).Single();
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Is.EqualTo(3),
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Assert.That(s0.Futures, Contains.Item(s1));
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"Failed to advance main timeline after last unit left");
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Assert.That(s0.Futures, Contains.Item(fork));
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Assert.That(
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Assert.That(fork.Past, Is.EqualTo(s0));
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world.Seasons.Where(s => s.Timeline != s0.Timeline).Count(),
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Is.EqualTo(1),
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"Failed to fork timeline when unit moved in");
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// Confirm that there is a unit in Tyr 1:1 originating from Mun 1:0
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// Confirm that there is a unit in Tyr 1:1 originating from Mun 1:0
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Season fork = world.GetSeason(1, 1);
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Unit originalUnit = world.GetUnitAt("Mun", s0.Coord);
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Unit originalUnit = world.GetUnitAt("Mun", s0.Coord);
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Unit aMun0 = world.GetUnitAt("Mun", s1.Coord);
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Unit aMun0 = world.GetUnitAt("Mun", s1.Coord);
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Unit aTyr = world.GetUnitAt("Tyr", fork.Coord);
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Unit aTyr = world.GetUnitAt("Tyr", fork.Coord);
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@ -100,4 +103,207 @@ public class TimeTravelTest
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"Expected A Tyr 0:0 to be in retreat");
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"Expected A Tyr 0:0 to be in retreat");
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Assert.That(world.RetreatingUnits.First().Unit, Is.EqualTo(tyr0.Order.Unit));
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Assert.That(world.RetreatingUnits.First().Unit, Is.EqualTo(tyr0.Order.Unit));
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}
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}
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[Test]
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public void FailedMoveDoesNotForkTimeline()
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{
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TestCaseBuilder setup = new(World.WithStandardMap(), MovementPhaseAdjudicator.Instance);
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// Hold to create a future, then attempt to attack in the past.
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setup[(0, 0)]
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.GetReference(out Season s0)
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["Germany"]
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.Army("Mun").Holds()
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["Austria"]
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.Army("Tyr").Holds().GetReference(out var tyr0)
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.Execute()
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[(1, 0)]
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.GetReference(out Season s1)
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["Germany"]
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.Army("Mun").MovesTo("Tyr", season: s0).GetReference(out var mun1)
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["Austria"]
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.Army("Tyr").Holds();
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setup.ValidateOrders();
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Assert.That(mun1, Is.Valid);
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setup.AdjudicateOrders();
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Assert.That(mun1, Is.Repelled);
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// The order to Tyr 0:0 should have been pulled into the adjudication set, so the reference
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// should not throw when accessing it.
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Assert.That(tyr0, Is.NotDislodged);
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// There should only be three seasons, all in the main timeline, since the move failed to
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// change the past and therefore did not create a new timeline.
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World world = setup.UpdateWorld();
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Assert.That(
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s0.Futures.Count(),
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Is.EqualTo(1),
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"A failed move incorrectly forked the timeline");
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Assert.That(s1.Futures.Count(), Is.EqualTo(1));
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Season s2 = world.GetSeason(s1.Turn + 1, s1.Timeline);
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Assert.That(s2.Futures.Count(), Is.EqualTo(0));
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}
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[Test]
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public void SuperfluousSupportDoesNotForkTimeline()
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{
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TestCaseBuilder setup = new(World.WithStandardMap(), MovementPhaseAdjudicator.Instance);
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// Move, then support the past move even though it succeeded already.
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setup[(0, 0)]
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.GetReference(out Season s0)
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["Germany"]
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.Army("Mun").MovesTo("Tyr").GetReference(out var mun0)
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.Army("Boh").Holds();
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setup.ValidateOrders();
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Assert.That(mun0, Is.Valid);
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setup.AdjudicateOrders();
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Assert.That(mun0, Is.Victorious);
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setup.UpdateWorld();
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setup[(1, 0)]
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.GetReference(out Season s1)
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["Germany"]
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.Army("Tyr").Holds()
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.Army("Boh").Supports.Army("Mun", season: s0).MoveTo("Tyr").GetReference(out var boh1);
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// The support does work and the move does succeed, but...
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setup.ValidateOrders();
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Assert.That(boh1, Is.Valid);
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setup.AdjudicateOrders();
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Assert.That(boh1, Is.NotCut);
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Assert.That(mun0, Is.Victorious);
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// ...since it succeeded anyway, no fork is created.
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World world = setup.UpdateWorld();
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Assert.That(
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s0.Futures.Count(),
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Is.EqualTo(1),
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"A superfluous support incorrectly forked the timeline");
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Assert.That(s1.Futures.Count(), Is.EqualTo(1));
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Season s2 = world.GetSeason(s1.Turn + 1, s1.Timeline);
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Assert.That(s2.Futures.Count(), Is.EqualTo(0));
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}
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[Test]
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public void CrossTimelineSupportDoesNotForkHead()
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{
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TestCaseBuilder setup = new(World.WithStandardMap(), MovementPhaseAdjudicator.Instance);
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// London creates two timelines by moving into the past.
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setup[(0, 0)]
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.GetReference(out var s0_0)
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["England"].Army("Lon").Holds()
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["Austria"].Army("Boh").Holds()
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["Germany"].Army("Mun").Holds()
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.Execute()
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[(1, 0)]
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["England"].Army("Lon").MovesTo("Yor", s0_0)
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.Execute()
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// Head seasons: 2:0 1:1
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// Both contain copies of the armies in Mun and Tyr.
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// Now Germany dislodges Austria in Tyr by supporting the move across timelines.
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[(2, 0)]
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.GetReference(out var s2_0)
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["Germany"].Army("Mun").MovesTo("Tyr").GetReference(out var mun2_0)
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["Austria"].Army("Tyr").Holds().GetReference(out var tyr2_0)
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[(1, 1)]
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.GetReference(out var s1_1)
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["Germany"].Army("Mun").Supports.Army("Mun", s2_0).MoveTo("Tyr").GetReference(out var mun1_1)
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["Austria"].Army("Tyr").Holds();
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// The attack against Tyr 2:0 succeeds.
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setup.ValidateOrders();
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Assert.That(mun2_0, Is.Valid);
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Assert.That(tyr2_0, Is.Valid);
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Assert.That(mun1_1, Is.Valid);
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setup.AdjudicateOrders();
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Assert.That(mun2_0, Is.Victorious);
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Assert.That(tyr2_0, Is.Dislodged);
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Assert.That(mun1_1, Is.NotCut);
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// Since both seasons were at the head of their timelines, there should be no forking.
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World world = setup.UpdateWorld();
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Assert.That(
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s2_0.Futures.Count(),
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Is.EqualTo(1),
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"A cross-timeline support incorrectly forked the head of the timeline");
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Assert.That(
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s1_1.Futures.Count(),
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Is.EqualTo(1),
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"A cross-timeline support incorrectly forked the head of the timeline");
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Season s3_0 = world.GetSeason(s2_0.Turn + 1, s2_0.Timeline);
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Assert.That(s3_0.Futures.Count(), Is.EqualTo(0));
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Season s2_1 = world.GetSeason(s1_1.Turn + 1, s1_1.Timeline);
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Assert.That(s2_1.Futures.Count(), Is.EqualTo(0));
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}
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[Test]
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public void CuttingCrossTimelineSupportDoesNotFork()
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{
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TestCaseBuilder setup = new(World.WithStandardMap(), MovementPhaseAdjudicator.Instance);
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// As above, only now London creates three timelines.
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setup[(0, 0)]
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.GetReference(out var s0_0)
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["England"].Army("Lon").Holds()
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["Austria"].Army("Boh").Holds()
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["Germany"].Army("Mun").Holds()
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.Execute()
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[(1, 0)]
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["England"].Army("Lon").MovesTo("Yor", s0_0)
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.Execute()
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// Head seasons: 2:0 1:1
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[(2, 0)]
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[(1, 1)]
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["England"].Army("Yor").MovesTo("Edi", s0_0)
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.Execute()
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// Head seasons: 3:0 2:1 1:2
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// All three of these contain copies of the armies in Mun and Tyr.
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// As above, Germany dislodges Austria in Tyr 3:0 by supporting the move from 2:1.
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[(3, 0)]
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.GetReference(out var s3_0)
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["Germany"].Army("Mun").MovesTo("Tyr")
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["Austria"].Army("Tyr").Holds()
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[(2, 1)]
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.GetReference(out Season s2_1)
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["Germany"].Army("Mun").Supports.Army("Mun", s3_0).MoveTo("Tyr").GetReference(out var mun2_1)
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["Austria"].Army("Tyr").Holds()
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[(1, 2)]
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["Germany"].Army("Mun").Holds()
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["Austria"].Army("Tyr").Holds()
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.Execute()
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// Head seasons: 4:0 3:1 2:2
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// Now Austria cuts the support in 2:1 by attacking from 2:2.
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[(4, 0)]
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["Germany"].Army("Tyr").Holds()
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[(3, 1)]
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["Germany"].Army("Mun").Holds()
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["Austria"].Army("Tyr").Holds()
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[(2, 2)]
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["Germany"].Army("Mun").Holds()
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["Austria"].Army("Tyr").MovesTo("Mun", s2_1).GetReference(out var tyr2_2);
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// The attack on Mun 2:1 is repelled, but the support is cut.
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setup.ValidateOrders();
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Assert.That(tyr2_2, Is.Valid);
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Assert.That(mun2_1, Is.Valid);
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setup.AdjudicateOrders();
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Assert.That(tyr2_2, Is.Repelled);
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Assert.That(mun2_1, Is.NotDislodged);
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Assert.That(mun2_1, Is.Cut);
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// Though the support was cut, the timeline doesn't fork because the outcome of a battle
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// wasn't changed in this timeline.
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World world = setup.UpdateWorld();
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Assert.That(
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s3_0.Futures.Count(),
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Is.EqualTo(1),
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"A cross-timeline support cut incorrectly forked the timeline");
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Assert.That(
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s2_1.Futures.Count(),
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Is.EqualTo(1),
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"A cross-timeline support cut incorrectly forked the timeline");
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}
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}
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}
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