Add unittests

src/backend/tests/unit/Workplaces/WorkplaceTests.cs

@@ -0,0 +1,61 @@
+using Randall.Domain.Workplaces;
+
+namespace Randall.Domain.UnitTests.Workplaces;
+
+public class WorkplaceTests
+{
+    [Fact]
+    public void Create_IsActiveByDefault()
+    {
+        var workplace = new Workplace("A1", "Pod A");
+
+        Assert.True(workplace.IsActive);
+    }
+
+    [Fact]
+    public void Create_SetsNameAndLocation()
+    {
+        var workplace = new Workplace("A1", "Pod A");
+
+        Assert.Equal("A1", workplace.Name);
+        Assert.Equal("Pod A", workplace.Location);
+    }
+
+    [Fact]
+    public void Create_AssignsNonEmptyId()
+    {
+        var workplace = new Workplace("A1", "Pod A");
+
+        Assert.NotEqual(Guid.Empty, workplace.Id);
+    }
+
+    [Fact]
+    public void Deactivate_SetsIsActiveToFalse()
+    {
+        var workplace = new Workplace("A1", "Pod A");
+
+        workplace.Deactivate();
+
+        Assert.False(workplace.IsActive);
+    }
+
+    [Fact]
+    public void Activate_AfterDeactivate_SetsIsActiveToTrue()
+    {
+        var workplace = new Workplace("A1", "Pod A");
+        workplace.Deactivate();
+
+        workplace.Activate();
+
+        Assert.True(workplace.IsActive);
+    }
+
+    [Fact]
+    public void Create_TwoWorkplaces_HaveDifferentIds()
+    {
+        var a = new Workplace("A1", "Pod A");
+        var b = new Workplace("A2", "Pod A");
+
+        Assert.NotEqual(a.Id, b.Id);
+    }
+}