Add tests that lesson-consequence promises were missing.

Teacher action must not cancel gain, a missing warmth need matches full warmth, snow on the street must reach DayPlans, and a lazy pupil still appears closer to the bell.

docs/phases/off-queue/53-weather-commute.md

@@ -30,7 +30,8 @@
 
 ## Критерий готовности
 
-- Снежным утром класс наполняется позже, чем ясным; ленивый по-прежнему ближе к звонку
+- Снежным утром `AppearAt` раньше на `commuteSnowMinutes` (запас на дорогу, не более медленная
+  ходьба); ленивый по-прежнему ближе к звонку
 - `dotnet test` проходит
 
 ## Стоп

tests/HSchool.Ai.Tests/WalkingTests.cs

@@ -162,6 +162,30 @@ public class WalkingTests
         Assert.True(implied.Comes);
     }
 
+    [Fact]
+    public void Lazy_AppearsCloserToTheBell_OnSnow()
+    {
+        var (catalog, map) = Fixtures.Vanilla();
+        var walks = WalkGraph.Build(catalog, map);
+        var roster = RosterGenerator.Generate(catalog, map, schoolSeed: 9, "Russia", TuesdayLesson);
+        var lazy = roster.People.First(person => person.IsStudent && person.Traits.Contains("Lazy"));
+        var schoolClass = roster.Classes.First(row => row.Id == lazy.ClassId);
+        var keen = roster.People.First(person =>
+            person.IsStudent && person.ClassId == lazy.ClassId && !person.Traits.Contains("Lazy"));
+        var table = new Timetable(
+            [new LessonPlacement(schoolClass.Id, "Mathematics", "t1", schoolClass.RoomId, Day: 1, Period: 1)],
+            []);
+        var extra = catalog.BehaviorRules!.CommuteSnowMinutes;
+        var lazyPlan = DayPlans.Build(
+            catalog, walks, lazy, schoolClass, table, TuesdayLesson, weekDays: 5, schoolSeed: 9, extra);
+        var keenPlan = DayPlans.Build(
+            catalog, walks, keen, schoolClass, table, TuesdayLesson, weekDays: 5, schoolSeed: 9, extra);
+
+        Assert.True(lazyPlan.Comes);
+        Assert.True(keenPlan.Comes);
+        Assert.True(lazyPlan.AppearAt > keenPlan.AppearAt);
+    }
+
     [Fact]
     public void SameSeedAndSnowMinutes_YieldTheSameAppearAt()
     {

tests/HSchool.Simulation.Tests/LessonTeacherPresentTests.cs

@@ -102,6 +102,24 @@ public class LessonTeacherPresentTests
         }
     }
 
+    [Fact]
+    public void TeacherActionInRoom_StillGains()
+    {
+        var (school, homeroom, pupilId, teacherId) = StaffedMath();
+        using (school)
+        {
+            AdvanceTo(school, LessonStart);
+            SetPlace(school, pupilId, homeroom);
+            SetPlace(school, teacherId, homeroom);
+            SetActivity(school, teacherId, "EatLunch");
+            var before = SkillOf(school, pupilId, "Mathematics");
+
+            LessonLearningSystem.Apply(school, 45);
+
+            Assert.True(SkillOf(school, pupilId, "Mathematics") > before);
+        }
+    }
+
     [Fact]
     public void HungryStillGainsLess_WhenTeacherIsPresent()
     {
@@ -221,6 +239,30 @@ public class LessonTeacherPresentTests
         }
     }
 
+    [Fact]
+    public void MissingWarmthNeed_GainsLikeFullWarmth()
+    {
+        var (school, homeroom, pupilId, teacherId) = StaffedMath();
+        using (school)
+        {
+            AdvanceTo(school, LessonStart);
+            SetPlace(school, pupilId, homeroom);
+            SetPlace(school, teacherId, homeroom);
+            ClearNeed(school, pupilId, "Warmth");
+            var start = SkillOf(school, pupilId, "Mathematics");
+            LessonLearningSystem.Apply(school, 45);
+            var missingGain = SkillOf(school, pupilId, "Mathematics") - start;
+
+            SetSkill(school, pupilId, "Mathematics", start);
+            SetNeed(school, pupilId, "Warmth", 1f);
+            LessonLearningSystem.Apply(school, 45);
+            var warmGain = SkillOf(school, pupilId, "Mathematics") - start;
+
+            Assert.True(missingGain > 0);
+            Assert.Equal(missingGain, warmGain, precision: 5);
+        }
+    }
+
     [Fact]
     public void Cold_DoesNotLog_WhenTeacherIsAbsent()
     {
@@ -394,6 +436,20 @@ public class LessonTeacherPresentTests
             });
     }
 
+    private static void SetActivity(School school, string personId, string actionId)
+    {
+        var query = new QueryDescription().WithAll<PersonIdentity, PersonActivity>();
+        school.World.Query(
+            in query,
+            (ref PersonIdentity identity, ref PersonActivity activity) =>
+            {
+                if (identity.Id.Equals(personId, StringComparison.Ordinal))
+                {
+                    activity = new PersonActivity(actionId, Thing: null, RemainingMinutes: 10f);
+                }
+            });
+    }
+
     private static void SetNeed(School school, string personId, string need, float value)
     {
         var query = new QueryDescription().WithAll<PersonIdentity, PersonNeeds>();
@@ -438,6 +494,20 @@ public class LessonTeacherPresentTests
             });
     }
 
+    private static void ClearNeed(School school, string personId, string need)
+    {
+        var query = new QueryDescription().WithAll<PersonIdentity, PersonNeeds>();
+        school.World.Query(
+            in query,
+            (ref PersonIdentity identity, ref PersonNeeds needs) =>
+            {
+                if (identity.Id.Equals(personId, StringComparison.Ordinal))
+                {
+                    needs.Values.Remove(need);
+                }
+            });
+    }
+
     private static void ClearSkill(School school, string personId, string skill)
     {
         var query = new QueryDescription().WithAll<PersonIdentity, PersonSkills>();

tests/HSchool.Simulation.Tests/WeatherTests.cs

@@ -1,5 +1,7 @@
+using HSchool.Ai;
 using HSchool.Content;
 using HSchool.People;
+using HSchool.Schedule;
 
 namespace HSchool.Simulation.Tests;
 
@@ -73,6 +75,24 @@ public class WeatherTests
         Assert.Equal(0, new OutdoorWeather(-5f, Precipitation.Snow).ExtraCommuteMinutes(null));
     }
 
+    [Fact]
+    public void SnowOnStreet_PlansAppearEarlierThanClear()
+    {
+        // Tick would SyncWeather and overwrite ForceWeather; Apply is the plan-build path.
+        using var clear = ComingOnTuesday();
+        using var snow = ComingOnTuesday();
+        clear.ForceWeather(new OutdoorWeather(8f, Precipitation.None));
+        snow.ForceWeather(new OutdoorWeather(-5f, Precipitation.Snow));
+        PresenceSystem.Apply(clear, 1);
+        PresenceSystem.Apply(snow, 1);
+
+        var pupilId = FirstComingPupil(clear);
+        var extra = clear.Catalog!.BehaviorRules!.CommuteSnowMinutes;
+        Assert.Equal(6, extra);
+        Assert.True(clear.Plans[pupilId].Comes);
+        Assert.Equal(clear.Plans[pupilId].AppearAt!.Value.AddMinutes(-extra), snow.Plans[pupilId].AppearAt);
+    }
+
     [Fact]
     public void SkipEmpty_SetsMondayMorningWeather_NotSaturdays()
     {
@@ -103,6 +123,25 @@ public class WeatherTests
         Assert.True(room < 18f, $"walls only, got {room}");
     }
 
+    private static readonly DateTime TuesdayMorning = new(2012, 4, 3, 6, 0, 0, DateTimeKind.Utc);
+
+    private static School ComingOnTuesday()
+    {
+        var school = Open(TuesdayMorning);
+        var schoolClass = school.Roster!.Classes.First();
+        school.SetTimetable(new Timetable(
+            [new LessonPlacement(schoolClass.Id, "Mathematics", "t1", schoolClass.RoomId, Day: 1, Period: 1)],
+            []));
+        return school;
+    }
+
+    private static string FirstComingPupil(School school)
+    {
+        var pupil = school.Roster!.People.First(person =>
+            person.IsStudent && person.ClassId == school.Timetable!.Lessons[0].ClassId);
+        return pupil.Id;
+    }
+
     private static School Open(DateTime start)
     {
         var (catalog, map) = VanillaMap();