test(utils): add tests for utility functions in utils folder

test/utils/ensureDirectoryExists.test.js

@@ -0,0 +1,54 @@
+import { expect } from 'chai';
+import esmock from 'esmock';
+import sinon from 'sinon';
+import fs from 'fs';
+
+describe('ensureDirectoryExists', () => {
+  let ensureDirectoryExists;
+  let fsMock;
+  let sandbox;
+
+  beforeEach(async () => {
+    sandbox = sinon.createSandbox();
+    fsMock = {
+      existsSync: sandbox.stub(),
+      mkdirSync: sandbox.stub(),
+    };
+
+    // Dynamically import ensureDirectoryExists and replace fs with a mock
+    ensureDirectoryExists = await esmock(
+      '../../src/utils/ensureDirectoryExists.js',
+      {
+        'fs': fsMock,
+      }
+    );
+  });
+
+  afterEach(() => {
+    sandbox.restore();
+    esmock.purge(ensureDirectoryExists);
+  });
+
+  it('should not create a directory if it already exists', () => {
+    const dirPath = 'path/to/existing/dir';
+
+    fsMock.existsSync.returns(true);
+
+    ensureDirectoryExists(dirPath);
+
+    expect(fsMock.existsSync.calledOnceWith(dirPath)).to.be.true;
+    expect(fsMock.mkdirSync.notCalled).to.be.true;
+  });
+
+  it('should create a directory if it does not exist', () => {
+    const dirPath = 'path/to/new/dir';
+
+    fsMock.existsSync.returns(false);
+
+    ensureDirectoryExists(dirPath);
+
+    expect(fsMock.existsSync.calledOnceWith(dirPath)).to.be.true;
+    expect(fsMock.mkdirSync.calledOnceWith(dirPath, { recursive: true })).to.be.true;
+  });
+});
+