Refactor products and buildings to support modding

backend/tests/MyBiz.Tests/BuildingTests.cs

@@ -0,0 +1,81 @@
+using MyBiz.Core;
+
+namespace MyBiz.Tests;
+
+public class BuildingTests
+{
+    [Fact]
+    public void Building_CalculateEfficiency_FullWorkers_ShouldBeMax()
+    {
+        // Arrange
+        var config = new BuildingTypeConfig
+        {
+            Id = "factory",
+            BaseEfficiency = 100,
+            WorkerSlots = 10
+        };
+        
+        var building = new Building
+        {
+            TypeConfig = config,
+            Workers = 10,
+            Level = 1
+        };
+
+        // Act
+        building.CalculateEfficiency();
+
+        // Assert
+        Assert.Equal(100, building.CurrentEfficiency);
+    }
+    
+    [Fact]
+    public void Building_CalculateEfficiency_NoWorkers_ShouldBeZero()
+    {
+        // Arrange
+        var config = new BuildingTypeConfig
+        {
+            Id = "factory",
+            BaseEfficiency = 100,
+            WorkerSlots = 10
+        };
+        
+        var building = new Building
+        {
+            TypeConfig = config,
+            Workers = 0,
+            Level = 1
+        };
+
+        // Act
+        building.CalculateEfficiency();
+
+        // Assert
+        Assert.Equal(0, building.CurrentEfficiency);
+    }
+    
+    [Fact]
+    public void Building_LevelBonus_ShouldIncreaseEfficiency()
+    {
+        // Arrange
+        var config = new BuildingTypeConfig
+        {
+            Id = "factory",
+            BaseEfficiency = 100,
+            WorkerSlots = 10
+        };
+        
+        var building = new Building
+        {
+            TypeConfig = config,
+            Workers = 10,
+            Level = 5
+        };
+
+        // Act
+        building.CalculateEfficiency();
+
+        // Assert
+        Assert.Equal(120, building.CurrentEfficiency); // 100 + (4 * 5)
+    }
+}