docs(NODE-3406): add versioned api examples (#2969)

test/examples/versioned_api.js

@@ -0,0 +1,43 @@
+'use strict';
+const MongoClient = require('../..').MongoClient;
+
+describe('examples.versionedApi:', function() {
+  let uri;
+  // eslint-disable-next-line no-unused-vars
+  let client;
+  before(function() {
+    uri = this.configuration.url();
+  });
+
+  it('declare an API version on a client', function() {
+    // Start Versioned API Example 1
+
+    client = new MongoClient(uri, { serverApi: { version: '1' } });
+
+    // End Versioned API Example 1
+  });
+
+  it('declare an API version on a client with strict enabled', function() {
+    // Start Versioned API Example 2
+
+    client = new MongoClient(uri, { serverApi: { version: '1', strict: true } });
+
+    // End Versioned API Example 2
+  });
+
+  it('declare an API version on a client with strict disabled', function() {
+    // Start Versioned API Example 3
+
+    client = new MongoClient(uri, { serverApi: { version: '1', strict: false } });
+
+    // End Versioned API Example 3
+  });
+
+  it('declare an API version on a client with deprecation errors enabled', function() {
+    // Start Versioned API Example 4
+
+    client = new MongoClient(uri, { serverApi: { version: '1', deprecationErrors: true } });
+
+    // End Versioned API Example 4
+  });
+});