test(NODE-4333): add unit test to check dependencies (#3361)

Author: durran

.github/workflows/dependencies.yml

@@ -0,0 +1,22 @@
+name: Check Dependencies
+
+on:
+  push:
+    branches: [ "main" ]
+  pull_request:
+    branches: [ "main" ]
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        node-version: [18.x]
+    steps:
+    - uses: actions/checkout@v3
+    - name: Use Node.js ${{ matrix.node-version }}
+      uses: actions/setup-node@v3
+      with:
+        node-version: ${{ matrix.node-version }}
+        cache: 'npm'
+    - run: npm install
+    - run: npm run check:dependencies

package.json

@@ -101,6 +101,7 @@
     "check:lint": "npm run build:dts && npm run check:dts && npm run check:eslint && npm run check:tsd",
     "check:eslint": "eslint -v && eslint --max-warnings=0 --ext '.js,.ts' src test",
     "check:tsd": "tsd --version && tsd",
+    "check:dependencies": "mocha test/unit/dependency.test.ts",
     "check:dts": "node ./node_modules/typescript/bin/tsc --noEmit mongodb.d.ts && tsd",
     "check:test": "mocha --config test/mocha_mongodb.json test/integration",
     "check:unit": "mocha test/unit",

test/unit/dependency.test.ts

@@ -0,0 +1,13 @@
+import { expect } from 'chai';
+
+import { dependencies } from '../../package.json';
+
+const EXPECTED_DEPENDENCIES = ['bson', 'denque', 'mongodb-connection-string-url', 'socks'];
+
+describe('package.json', function () {
+  describe('dependencies', function () {
+    it('only contains the expected dependencies', function () {
+      expect(Object.getOwnPropertyNames(dependencies)).to.deep.equal(EXPECTED_DEPENDENCIES);
+    });
+  });
+});