Add interaction tests (#15251)

Content.IntegrationTests/Tests/Construction/Interaction/GrilleWindowConstruction.cs

@@ -0,0 +1,59 @@
+using System.Threading.Tasks;
+using Content.IntegrationTests.Tests.Interaction;
+using Content.Shared.Construction.Prototypes;
+using NUnit.Framework;
+using Robust.Shared.Maths;
+
+namespace Content.IntegrationTests.Tests.Construction.Interaction;
+
+/// <summary>
+///     Check that we can build grilles on top of windows, but not the other way around.
+/// </summary>
+public sealed class GrilleWindowConstruction : InteractionTest
+{
+    private const string Grille = "Grille";
+    private const string Window = "Window";
+
+    [Test]
+    public async Task WindowOnGrille()
+    {
+        // Construct Grille
+        await StartConstruction(Grille);
+        await Interact(Rod, 10);
+        AssertPrototype(Grille);
+
+        var grille = Target;
+
+        // Construct Window
+        await StartConstruction(Window);
+        await Interact(Glass, 10);
+        AssertPrototype(Window);
+
+        // Deconstruct Window
+        await Interact(Screw, Wrench);
+        AssertDeleted();
+
+        // Deconstruct Grille
+        Target = grille;
+        await Interact(Cut);
+        AssertDeleted();
+    }
+
+    [Test]
+    [TestCase(Grille, Grille)]
+    [TestCase(Window, Grille)]
+    [TestCase(Window, Window)]
+    public async Task ConstructionBlocker(string first, string second)
+    {
+        // Spawn blocking entity
+        await SpawnTarget(first);
+
+        // Further construction attempts fail - blocked by first entity interaction.
+        await Client.WaitPost(() =>
+        {
+            var proto = ProtoMan.Index<ConstructionPrototype>(second);
+            Assert.That(CConSys.TrySpawnGhost(proto, TargetCoords, Direction.South, out _), Is.False);
+        });
+    }
+}
+