test: ensure connection with sharded topology

NODE-2827

Author: Thomas Reggi

test/functional/sharding_connection.test.js

@@ -0,0 +1,24 @@
+'use strict';
+
+const withClient = require('./shared').withClient;
+const setupDatabase = require('./shared').setupDatabase;
+const expect = require('chai').expect;
+const TopologyType = require('../../lib/sdam/common').TopologyType;
+
+describe('Sharding (Connection)', function () {
+  before(function () {
+    return setupDatabase(this.configuration);
+  });
+
+  it('Should use sharded topology', {
+    metadata: { requires: { topology: 'sharded' } },
+    test: function () {
+      const client = this.configuration.newClient({});
+      return withClient(client, (client, done) => {
+        expect(client).to.exist;
+        expect(client).nested.property('topology.description.type').to.equal(TopologyType.Sharded);
+        return done();
+      })();
+    }
+  });
+});