Phase 40: clock tempo at 1 min/s, x5/x10 heavy stride.

tests/HSchool.Simulation.Tests/ClockTempoTests.cs

@@ -0,0 +1,55 @@
+namespace HSchool.Simulation.Tests;
+
+public class ClockTempoTests
+{
+    private static readonly DateTime Start = new(2012, 4, 3, 6, 0, 0, DateTimeKind.Utc);
+
+    private const double OneTwentiethOfASecond = 1d / 20d;
+    private const double GameMinutesPerRealSecond = 1d;
+
+    [Fact]
+    public void AtX10_TwentyImpulses_RunHeavyTenTimesAndAdvanceTenGameMinutes()
+    {
+        using var school = School.Create(1, "Страйд", Start);
+        school.Clock.SpeedIndex = 4;
+
+        for (var i = 0; i < 20; i++)
+        {
+            school.Tick(OneTwentiethOfASecond, GameMinutesPerRealSecond);
+        }
+
+        Assert.Equal(Start.AddMinutes(10), school.Clock.Time);
+        Assert.Equal(10, school.HeavySystemsInvocations);
+        Assert.Equal(1d, school.LastHeavyGameMinutes);
+    }
+
+    [Fact]
+    public void AtX1_EveryImpulseRunsHeavySystems()
+    {
+        using var school = School.Create(1, "Каждый импульс", Start);
+        school.Clock.SpeedIndex = 1;
+
+        for (var i = 0; i < 20; i++)
+        {
+            school.Tick(OneTwentiethOfASecond, GameMinutesPerRealSecond);
+        }
+
+        Assert.Equal(20, school.HeavySystemsInvocations);
+    }
+
+    [Theory]
+    [InlineData(3, 5d)]
+    [InlineData(4, 10d)]
+    public void HighSpeedIndex_OneRealSecond_AdvancesExpectedGameMinutes(int speedIndex, double expectedMinutes)
+    {
+        using var school = School.Create(1, "Быстро", Start);
+        school.Clock.SpeedIndex = speedIndex;
+
+        for (var i = 0; i < 20; i++)
+        {
+            school.Tick(OneTwentiethOfASecond, GameMinutesPerRealSecond);
+        }
+
+        Assert.Equal(Start.AddMinutes(expectedMinutes), school.Clock.Time);
+    }
+}