Add interaction tests (#15251)

Content.IntegrationTests/Tests/Payload/ModularGrenadeTests.cs

@@ -0,0 +1,76 @@
+using System.Threading.Tasks;
+using Content.IntegrationTests.Tests.Interaction;
+using Content.Server.Explosion.Components;
+using NUnit.Framework;
+using Robust.Shared.Containers;
+using Robust.Shared.GameObjects;
+
+namespace Content.IntegrationTests.Tests.Payload;
+
+public sealed class ModularGrenadeTests : InteractionTest
+{
+    public const string Trigger = "TimerTrigger";
+    public const string Payload = "ExplosivePayload";
+
+    /// <summary>
+    /// Test that a modular grenade can be fully crafted and detonated.
+    /// </summary>
+    [Test]
+    public async Task AssembleAndDetonateGrenade()
+    {
+        await PlaceInHands(Steel, 5);
+        await CraftItem("ModularGrenadeRecipe");
+        Target = await FindEntity("ModularGrenade");
+
+        await Drop();
+        await Interact(Cable);
+
+        // Insert & remove trigger
+        AssertComp<OnUseTimerTriggerComponent>(false);
+        await Interact(Trigger);
+        AssertComp<OnUseTimerTriggerComponent>();
+        await FindEntity(Trigger, LookupFlags.Uncontained, shouldSucceed: false);
+        await Interact(Pry);
+        AssertComp<OnUseTimerTriggerComponent>(false);
+
+        // Trigger was dropped to floor, not deleted.
+        await FindEntity(Trigger, LookupFlags.Uncontained);
+
+        // Re-insert
+        await Interact(Trigger);
+        AssertComp<OnUseTimerTriggerComponent>();
+
+        // Insert & remove payload.
+        await Interact(Payload);
+        await FindEntity(Payload, LookupFlags.Uncontained, shouldSucceed: false);
+        await Interact(Pry);
+        var ent = await FindEntity(Payload, LookupFlags.Uncontained);
+        await Delete(ent);
+
+        // successfully insert a second time
+        await Interact(Payload);
+        ent = await FindEntity(Payload);
+        var sys = SEntMan.System<SharedContainerSystem>();
+        Assert.That(sys.IsEntityInContainer(ent));
+
+        // Activate trigger.
+        await Pickup();
+        AssertComp<ActiveTimerTriggerComponent>(false);
+        await UseInHand();
+
+        // So uhhh grenades in hands don't destroy themselves when exploding. Maybe that will be fixed eventually.
+        await Drop();
+
+        // Wait until grenade explodes
+        var timer = Comp<ActiveTimerTriggerComponent>();
+        while (timer.TimeRemaining >= 0)
+        {
+            await RunTicks(10);
+        }
+
+        // Grenade has exploded.
+        await RunTicks(5);
+        AssertDeleted();
+    }
+}
+