diff --git a/app/tests/dependencyAnalyzer.test.ts b/app/tests/dependencyAnalyzer.test.ts
new file mode 100644
index 0000000..40a0f60
--- /dev/null
+++ b/app/tests/dependencyAnalyzer.test.ts
@@ -0,0 +1,219 @@
+import * as fs from 'fs';
+import * as path from 'path';
+import * as os from 'os';
+import { analyzeDependencies } from '../src/analyzers/dependencyAnalyzer';
+
+describe('DependencyAnalyzer', () => {
+  let tempDir: string;
+
+  beforeEach(() => {
+    tempDir = fs.mkdtempSync(path.join(os.tmpdir(), 'ai-context-dep-test-'));
+  });
+
+  afterEach(() => {
+    fs.rmSync(tempDir, { recursive: true, force: true });
+  });
+
+  describe('Node.js dependencies', () => {
+    it('should parse package.json dependencies', async () => {
+      const packageJson = {
+        name: 'test-project',
+        version: '1.0.0',
+        dependencies: {
+          express: '^4.18.2',
+          lodash: '^4.17.21'
+        },
+        devDependencies: {
+          jest: '^29.7.0',
+          typescript: '^5.3.3'
+        }
+      };
+      fs.writeFileSync(
+        path.join(tempDir, 'package.json'),
+        JSON.stringify(packageJson)
+      );
+
+      const result = await analyzeDependencies(tempDir, 'node');
+
+      expect(result.dependencies).toHaveLength(4);
+      expect(result.dependencies.find(d => d.name === 'express')).toEqual({
+        name: 'express',
+        version: '^4.18.2',
+        type: 'prod'
+      });
+      expect(result.dependencies.find(d => d.name === 'jest')).toEqual({
+        name: 'jest',
+        version: '^29.7.0',
+        type: 'dev'
+      });
+      expect(result.packageManager).toBe('npm');
+    });
+
+    it('should detect yarn package manager', async () => {
+      const packageJson = {
+        name: 'test-project',
+        dependencies: { express: '^4.18.0' }
+      };
+      fs.writeFileSync(
+        path.join(tempDir, 'package.json'),
+        JSON.stringify(packageJson)
+      );
+      fs.writeFileSync(path.join(tempDir, 'yarn.lock'), '# yarn lock file');
+
+      const result = await analyzeDependencies(tempDir, 'node');
+
+      expect(result.packageManager).toBe('yarn');
+      expect(result.lockFile).toBe('yarn.lock');
+    });
+
+    it('should detect pnpm package manager', async () => {
+      const packageJson = {
+        name: 'test-project',
+        dependencies: { express: '^4.18.0' }
+      };
+      fs.writeFileSync(
+        path.join(tempDir, 'package.json'),
+        JSON.stringify(packageJson)
+      );
+      fs.writeFileSync(path.join(tempDir, 'pnpm-lock.yaml'), '# pnpm lock file');
+
+      const result = await analyzeDependencies(tempDir, 'node');
+
+      expect(result.packageManager).toBe('pnpm');
+    });
+  });
+
+  describe('Python dependencies', () => {
+    it('should parse requirements.txt', async () => {
+      fs.writeFileSync(
+        path.join(tempDir, 'requirements.txt'),
+        `flask>=2.0.0
+requests==2.28.0
+numpy~=1.24.0
+pandas # pandas for data analysis
+django<4.0
+black; python_version >= "3.6"
+`
+      );
+
+      const result = await analyzeDependencies(tempDir, 'python');
+
+      expect(result.dependencies.length).toBeGreaterThan(0);
+      const flaskDep = result.dependencies.find(d => d.name === 'flask');
+      expect(flaskDep).toBeDefined();
+      expect(flaskDep?.type).toBe('prod');
+      expect(result.packageManager).toBe('pip');
+    });
+
+    it('should detect poetry package manager', async () => {
+      fs.writeFileSync(
+        path.join(tempDir, 'pyproject.toml'),
+        `[tool.poetry]
+name = "test-project"
+version = "0.1.0"
+
+[tool.poetry.dependencies]
+python = "^3.8"
+fastapi = "^0.100.0"
+`
+      );
+      fs.writeFileSync(path.join(tempDir, 'poetry.lock'), '# poetry lock');
+
+      const result = await analyzeDependencies(tempDir, 'python');
+
+      expect(result.packageManager).toBe('poetry');
+    });
+  });
+
+  describe('Go dependencies', () => {
+    it('should parse go.mod', async () => {
+      const goMod = `module github.com/test/project
+
+go 1.20
+
+require (
+    github.com/gin-gonic/gin v1.9.1
+    github.com/gofiber/fiber v2.52.0
+)
+`;
+      fs.writeFileSync(path.join(tempDir, 'go.mod'), goMod);
+
+      const result = await analyzeDependencies(tempDir, 'go');
+
+      expect(result.dependencies.length).toBe(2);
+      expect(result.packageManager).toBe('go');
+      const ginDep = result.dependencies.find(d => d.name.includes('gin-gonic/gin'));
+      expect(ginDep).toBeDefined();
+    });
+  });
+
+  describe('Rust dependencies', () => {
+    it('should parse Cargo.toml', async () => {
+      const cargoToml = `[package]
+name = "test"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
+serde = "1.0"
+tokio = "1.0"
+
+[dev.dependencies]
+tempfile = "3.0"
+`;
+      fs.writeFileSync(path.join(tempDir, 'Cargo.toml'), cargoToml);
+
+      const result = await analyzeDependencies(tempDir, 'rust');
+
+      expect(result.dependencies.length).toBe(3);
+      expect(result.packageManager).toBe('cargo');
+      const serdeDep = result.dependencies.find(d => d.name === 'serde');
+      expect(serdeDep).toBeDefined();
+      expect(serdeDep?.type).toBe('prod');
+      const tempfileDep = result.dependencies.find(d => d.name === 'tempfile');
+      expect(tempfileDep?.type).toBe('dev');
+    });
+  });
+
+  describe('Java dependencies', () => {
+    it('should parse pom.xml', async () => {
+      const pomXml = `<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0">
+  <modelVersion>4.0.0</modelVersion>
+  <groupId>com.test</groupId>
+  <artifactId>test</artifactId>
+  <version>1.0.0</version>
+  
+  <dependencies>
+    <dependency>
+      <groupId>org.springframework.boot</groupId>
+      <artifactId>spring-boot-starter</artifactId>
+      <version>3.1.0</version>
+    </dependency>
+    <dependency>
+      <groupId>com.fasterxml.jackson.core</groupId>
+      <artifactId>jackson-databind</artifactId>
+      <version>2.15.0</version>
+    </dependency>
+  </dependencies>
+</project>`;
+      fs.writeFileSync(path.join(tempDir, 'pom.xml'), pomXml);
+
+      const result = await analyzeDependencies(tempDir, 'java');
+
+      expect(result.dependencies.length).toBe(2);
+      expect(result.packageManager).toBe('maven');
+      const springDep = result.dependencies.find(d => d.name.includes('spring-boot-starter'));
+      expect(springDep).toBeDefined();
+    });
+  });
+
+  describe('Empty project', () => {
+    it('should return empty dependencies for unknown project type', async () => {
+      const result = await analyzeDependencies(tempDir, 'unknown');
+
+      expect(result.dependencies).toHaveLength(0);
+      expect(result.packageManager).toBeNull();
+    });
+  });
+});