refactoring: Masive refactor to build the V2

src/test/kotlin/eventDemo/contexts/auth/domain/UserTest.kt

@@ -0,0 +1,34 @@
+package eventDemo.contexts.auth.domain
+
+import eventDemo.contexts.auth.domain.events.NewUserCreatedEvent
+import io.kotest.core.spec.style.FunSpec
+import io.kotest.matchers.shouldBe
+import org.junit.jupiter.api.assertNotNull
+
+class UserTest :
+  FunSpec({
+
+    test("Create User") {
+      User.createNewUser("Bob", "changeit").run {
+        username shouldBe "Bob"
+        password shouldBe "changeit"
+      }
+    }
+
+    test("Create User With event") {
+      User
+        .loadFromHistory(
+          setOf(
+            NewUserCreatedEvent(
+              "Bob",
+              "changeit",
+              version = 1,
+            ),
+          ),
+        ).run {
+          assertNotNull(this)
+          username shouldBe "Bob"
+          password shouldBe "changeit"
+        }
+    }
+  })