From 7f45134e7550e746ee0086167067bdcf4726f356 Mon Sep 17 00:00:00 2001
From: waleedcodes <110061477+waleedcodes@users.noreply.github.com>
Date: Fri, 9 Oct 2026 21:24:34 +0500
Subject: [PATCH 1/3] test(graph): scaffold project graph test fixture and
 suite

---
 tests/projectGraph.test.ts | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)
 create mode 100644 tests/projectGraph.test.ts

diff --git a/tests/projectGraph.test.ts b/tests/projectGraph.test.ts
new file mode 100644
index 0000000..2b600a8
--- /dev/null
+++ b/tests/projectGraph.test.ts
@@ -0,0 +1,19 @@
+import * as fs from 'node:fs';
+import * as os from 'node:os';
+import * as path from 'node:path';
+import { afterEach, beforeEach, describe, expect, it } from 'vitest';
+import { ProjectGraph } from '../src/graph/projectGraph';
+
+describe('ProjectGraph', () => {
+  let tempDir: string;
+
+  beforeEach(() => {
+    tempDir = fs.mkdtempSync(path.join(os.tmpdir(), 'proofcode-graph-test-'));
+  });
+
+  afterEach(() => {
+    fs.rmSync(tempDir, { recursive: true, force: true });
+  });
+
+  it('should map imports and compute reverse dependents', async () => {
+    // File A: userService.ts

From b4d9b197c7478900efe87878f7036d67541f055b Mon Sep 17 00:00:00 2001
From: waleedcodes <110061477+waleedcodes@users.noreply.github.com>
Date: Fri, 9 Oct 2026 21:24:34 +0500
Subject: [PATCH 2/3] test(graph): test dependency resolution and reverse
 mapping

---
 tests/projectGraph.test.ts | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/tests/projectGraph.test.ts b/tests/projectGraph.test.ts
index 2b600a8..fd6b6f6 100644
--- a/tests/projectGraph.test.ts
+++ b/tests/projectGraph.test.ts
@@ -17,3 +17,26 @@ describe('ProjectGraph', () => {
 
   it('should map imports and compute reverse dependents', async () => {
     // File A: userService.ts
+    const userPath = path.join(tempDir, 'userService.ts');
+    fs.writeFileSync(
+      userPath,
+      `export function getUser(id: string) { return { id }; }`,
+      'utf8'
+    );
+
+    // File B: orderController.ts imports userService
+    const orderPath = path.join(tempDir, 'orderController.ts');
+    fs.writeFileSync(
+      orderPath,
+      `import { getUser } from './userService';
+export function handleOrder(userId: string) {
+  const user = getUser(userId);
+  return user;
+}`,
+      'utf8'
+    );
+
+    const graph = new ProjectGraph(tempDir);
+    await graph.buildGraph([userPath, orderPath]);
+
+    const dependents = graph.getDependents(userPath);

From d693efa3dd6c3af7f7710d4922935da9073187b5 Mon Sep 17 00:00:00 2001
From: waleedcodes <110061477+waleedcodes@users.noreply.github.com>
Date: Fri, 9 Oct 2026 21:24:34 +0500
Subject: [PATCH 3/3] test(graph): test impact calculation and untested caller
 flags

---
 tests/projectGraph.test.ts | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/tests/projectGraph.test.ts b/tests/projectGraph.test.ts
index fd6b6f6..af5ffa8 100644
--- a/tests/projectGraph.test.ts
+++ b/tests/projectGraph.test.ts
@@ -40,3 +40,17 @@ export function handleOrder(userId: string) {
     await graph.buildGraph([userPath, orderPath]);
 
     const dependents = graph.getDependents(userPath);
+    expect(dependents.has(orderPath)).toBe(true);
+
+    const changedLinesMap = new Map<string, number[]>();
+    changedLinesMap.set(userPath, [1]);
+
+    const impact = graph.computeImpact(changedLinesMap);
+    expect(impact.changedFiles).toContain(userPath);
+    expect(impact.changedSymbols).toHaveLength(1);
+    expect(impact.changedSymbols[0].symbolName).toBe('getUser');
+    expect(impact.changedSymbols[0].callers).toHaveLength(1);
+    expect(impact.changedSymbols[0].callers[0].callerName).toBe('handleOrder');
+    expect(impact.untestedCallersCount).toBe(1);
+  });
+});