feat(SM-9): add Java integration test with class Child extends Parent fixture

Agent-Logs-Url: https://github.com/abhigyanpatwari/GitNexus/sessions/cc58249b-42f1-45a9-89fb-e3917e4d0171

Co-authored-by: magyargergo <11230420+magyargergo@users.noreply.github.com>

gitnexus/package-lock.json

@@ -17,7 +17,6 @@
         "commander": "^12.0.0",
         "cors": "^2.8.5",
         "express": "^4.19.2",
-        "gitnexus-shared": "file:../gitnexus-shared",
         "glob": "^11.0.0",
         "graphology": "^0.25.4",
         "graphology-indices": "^0.17.0",

gitnexus/test/fixtures/lang-resolution/java-child-extends-parent/src/models/Child.java

@@ -0,0 +1,5 @@
+package models;
+
+public class Child extends Parent {
+    public void childOnly() {}
+}

gitnexus/test/fixtures/lang-resolution/java-child-extends-parent/src/models/Parent.java

@@ -0,0 +1,5 @@
+package models;
+
+public class Parent {
+    public String parentMethod() { return "hello"; }
+}

gitnexus/test/fixtures/lang-resolution/java-child-extends-parent/src/services/App.java

@@ -0,0 +1,10 @@
+package services;
+
+import models.Child;
+
+public class App {
+    public void run() {
+        Child c = new Child();
+        c.parentMethod();
+    }
+}

gitnexus/test/integration/resolvers/java.test.ts

@@ -2098,3 +2098,38 @@ describe('Cross-class method chain resolution (Java) — #575', () => {
     expect(cityAccess.length).toBe(1);
   });
 });
+
+// ---------------------------------------------------------------------------
+// SM-9: lookupMethodByOwnerWithMRO — class Child extends Parent
+// child.parentMethod() resolves to Parent#parentMethod via MRO parent walk.
+// ---------------------------------------------------------------------------
+
+describe('Java Child extends Parent — inherited method resolution (SM-9)', () => {
+  let result: PipelineResult;
+
+  beforeAll(async () => {
+    result = await runPipelineFromRepo(
+      path.join(FIXTURES, 'java-child-extends-parent'),
+      () => {},
+    );
+  }, 60000);
+
+  it('detects Parent and Child classes', () => {
+    const classes = getNodesByLabel(result, 'Class');
+    expect(classes).toContain('Parent');
+    expect(classes).toContain('Child');
+  });
+
+  it('emits EXTENDS edge: Child → Parent', () => {
+    const extends_ = getRelationships(result, 'EXTENDS');
+    expect(edgeSet(extends_)).toContain('Child → Parent');
+  });
+
+  it('resolves c.parentMethod() to Parent#parentMethod via MRO walk', () => {
+    const calls = getRelationships(result, 'CALLS');
+    const parentMethodCall = calls.find(
+      (c) => c.target === 'parentMethod' && c.targetFilePath.includes('Parent'),
+    );
+    expect(parentMethodCall).toBeDefined();
+  });
+});