Throw exception if auto-encryption is enabled for async MongoClient

JAVA-3313

Author: jyemin

driver-async/src/main/com/mongodb/async/client/MongoClientSettings.java

@@ -95,6 +95,7 @@ private Builder() {
         }
 
         private Builder(final com.mongodb.MongoClientSettings settings) {
+            isTrue("auto-encryption settings is null", settings.getAutoEncryptionSettings() == null);
             notNull("settings", settings);
             wrappedBuilder = com.mongodb.MongoClientSettings.builder(settings);
             MongoCredential credential = settings.getCredential();

driver-async/src/test/functional/com/mongodb/async/client/MongoClientsSpecification.groovy

@@ -16,6 +16,7 @@
 
 package com.mongodb.async.client
 
+import com.mongodb.AutoEncryptionSettings
 import com.mongodb.MongoCompressor
 import com.mongodb.MongoCredential
 import com.mongodb.MongoDriverInformation
@@ -252,4 +253,17 @@ class MongoClientsSpecification extends FunctionalSpecification {
         }
         client?.close()
     }
+
+    def 'should throw if AutoEncryptionSettings is not null'() {
+        when:
+        MongoClients.create(com.mongodb.MongoClientSettings.builder()
+                .autoEncryptionSettings(AutoEncryptionSettings.builder()
+                        .keyVaultNamespace('test.keys')
+                        .kmsProviders([local: ['key': new byte[96]]])
+                        .build())
+                .build())
+
+        then:
+        thrown(IllegalStateException)
+    }
 }