heauristic bean resolution

state_machine_exporter/src/test/java/click/kamil/springstatemachineexporter/analysis/enricher/routing/HeuristicRoutingEngineTest.java

@@ -0,0 +1,103 @@
+package click.kamil.springstatemachineexporter.analysis.enricher.routing;
+
+import click.kamil.springstatemachineexporter.analysis.model.CallChain;
+import org.junit.jupiter.api.Tag;
+import org.junit.jupiter.api.Test;
+
+import java.util.Arrays;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+@Tag("heuristic_bean_resolution")
+public class HeuristicRoutingEngineTest {
+
+    private final HeuristicRoutingEngine engine = new HeuristicRoutingEngine();
+
+    @Test
+    public void testDeepPackageDivergenceMismatch() {
+        // This is the bug case: sharing a deep root, but diverging into different domains
+        CallChain chain = CallChain.builder()
+                .methodChain(Arrays.asList("com.acme.corp.division.project.orders.OrderService.pay()"))
+                .build();
+
+        String machineName = "com.acme.corp.division.project.payments.PaymentStateMachine";
+
+        boolean result = engine.isRoutedToCorrectMachine(chain, machineName);
+
+        // They share com.acme.corp.division.project, but diverge into orders vs payments
+        // This should be a strong mismatch, so it should return false
+        assertFalse(result, "Deep package divergence into different domains should be rejected");
+    }
+
+    @Test
+    public void testSameDomainMatch() {
+        CallChain chain = CallChain.builder()
+                .methodChain(Arrays.asList("com.acme.ecommerce.orders.OrderService.process()"))
+                .build();
+
+        String machineName = "com.acme.ecommerce.orders.OrderStateMachine";
+
+        boolean result = engine.isRoutedToCorrectMachine(chain, machineName);
+
+        // Same exact domain, should match
+        assertTrue(result, "Same domain should be accepted");
+    }
+
+    @Test
+    public void testSubPackageMatch() {
+        CallChain chain = CallChain.builder()
+                .methodChain(Arrays.asList("com.acme.ecommerce.orders.impl.OrderServiceImpl.process()"))
+                .build();
+
+        String machineName = "com.acme.ecommerce.orders.OrderStateMachine";
+
+        boolean result = engine.isRoutedToCorrectMachine(chain, machineName);
+
+        // Subpackage should match
+        assertTrue(result, "Sub-packages of the same domain should be accepted");
+    }
+
+    @Test
+    public void testSharedDomainTermMatch() {
+        CallChain chain = CallChain.builder()
+                .methodChain(Arrays.asList("com.acme.orders.web.OrderController.submit()"))
+                .build();
+
+        String machineName = "com.acme.orders.service.OrderStateMachine";
+
+        boolean result = engine.isRoutedToCorrectMachine(chain, machineName);
+
+        // Different subpackages, but they share the "order" domain term and common prefix
+        assertTrue(result, "Divergent packages that share a domain term should be accepted");
+    }
+
+    @Test
+    public void testExplicitTargetVariableMatch() {
+        CallChain chain = CallChain.builder()
+                .methodChain(Arrays.asList("com.acme.common.GlobalTrigger.fire()"))
+                .contextMachineId("paymentStateMachine") // Explicitly targets payment
+                .build();
+
+        String machineName = "com.acme.corp.payments.PaymentStateMachine";
+
+        boolean result = engine.isRoutedToCorrectMachine(chain, machineName);
+
+        // Mismatched domains, but explicit variable targeting works
+        assertTrue(result, "Explicit variable target matching the machine name should be accepted");
+    }
+
+    @Test
+    public void testExplicitTargetVariableMismatch() {
+        CallChain chain = CallChain.builder()
+                .methodChain(Arrays.asList("com.acme.common.GlobalTrigger.fire()"))
+                .contextMachineId("paymentStateMachine") // Explicitly targets payment
+                .build();
+
+        String machineName = "com.acme.corp.orders.OrderStateMachine"; // But this is Order
+
+        boolean result = engine.isRoutedToCorrectMachine(chain, machineName);
+
+        // Explicit variable targeting completely conflicts
+        assertFalse(result, "Explicit variable target mismatching the machine name should be rejected");
+    }
+}