Require use of PHP 7 features in coding standard

composer.json

@@ -18,7 +18,7 @@
     "require-dev": {
         "phpunit/phpunit": "^6.4 || ^8.3",
         "sebastian/comparator": "^2.0 || ^3.0",
-        "squizlabs/php_codesniffer": "^3.4",
+        "squizlabs/php_codesniffer": "^3.5",
         "symfony/phpunit-bridge": "^4.4@dev"
     },
     "autoload": {

phpcs.xml.dist

@@ -17,16 +17,14 @@
 
     <rule ref="Doctrine">
         <!-- Exclude sniffs that require newer PHP versions -->
-        <!-- Available with PHP 7.0 -->
-        <exclude name="SlevomatCodingStandard.TypeHints.DeclareStrictTypes" />
-        <exclude name="SlevomatCodingStandard.Exceptions.ReferenceThrowableOnly" />
-        <exclude name="SlevomatCodingStandard.ControlStructures.RequireNullCoalesceOperator" />
-
         <!-- Available with PHP 7.1 -->
         <exclude name="SlevomatCodingStandard.Classes.ClassConstantVisibility" />
         <exclude name="SlevomatCodingStandard.PHP.ShortList.LongListUsed" />
         <exclude name="SlevomatCodingStandard.TypeHints.NullableTypeForNullDefaultValue" />
 
+        <!-- Can cause subtle BC breaks, disabled for now -->
+        <exclude name="SlevomatCodingStandard.TypeHints.DeclareStrictTypes" />
+
         <!-- No statement alignment so far -->
         <exclude name="Generic.Formatting.MultipleStatementAlignment" />
 

src/Client.php

@@ -109,7 +109,7 @@ class Client
         }
 
         $this->uri = (string) $uri;
-        $this->typeMap = isset($driverOptions['typeMap']) ? $driverOptions['typeMap'] : null;
+        $this->typeMap = $driverOptions['typeMap'] ?? null;
 
         unset($driverOptions['typeMap']);
 

src/Collection.php

@@ -162,10 +162,10 @@ class Collection
         $this->manager = $manager;
         $this->databaseName = (string) $databaseName;
         $this->collectionName = (string) $collectionName;
-        $this->readConcern = isset($options['readConcern']) ? $options['readConcern'] : $this->manager->getReadConcern();
-        $this->readPreference = isset($options['readPreference']) ? $options['readPreference'] : $this->manager->getReadPreference();
-        $this->typeMap = isset($options['typeMap']) ? $options['typeMap'] : self::$defaultTypeMap;
-        $this->writeConcern = isset($options['writeConcern']) ? $options['writeConcern'] : $this->manager->getWriteConcern();
+        $this->readConcern = $options['readConcern'] ?? $this->manager->getReadConcern();
+        $this->readPreference = $options['readPreference'] ?? $this->manager->getReadPreference();
+        $this->typeMap = $options['typeMap'] ?? self::$defaultTypeMap;
+        $this->writeConcern = $options['writeConcern'] ?? $this->manager->getWriteConcern();
     }
 
     /**

src/Database.php

@@ -129,10 +129,10 @@ class Database
 
         $this->manager = $manager;
         $this->databaseName = (string) $databaseName;
-        $this->readConcern = isset($options['readConcern']) ? $options['readConcern'] : $this->manager->getReadConcern();
-        $this->readPreference = isset($options['readPreference']) ? $options['readPreference'] : $this->manager->getReadPreference();
-        $this->typeMap = isset($options['typeMap']) ? $options['typeMap'] : self::$defaultTypeMap;
-        $this->writeConcern = isset($options['writeConcern']) ? $options['writeConcern'] : $this->manager->getWriteConcern();
+        $this->readConcern = $options['readConcern'] ?? $this->manager->getReadConcern();
+        $this->readPreference = $options['readPreference'] ?? $this->manager->getReadPreference();
+        $this->typeMap = $options['typeMap'] ?? self::$defaultTypeMap;
+        $this->writeConcern = $options['writeConcern'] ?? $this->manager->getWriteConcern();
     }
 
     /**

src/GridFS/Bucket.php

@@ -180,10 +180,10 @@ class Bucket
         $this->bucketName = $options['bucketName'];
         $this->chunkSizeBytes = $options['chunkSizeBytes'];
         $this->disableMD5 = $options['disableMD5'];
-        $this->readConcern = isset($options['readConcern']) ? $options['readConcern'] : $this->manager->getReadConcern();
-        $this->readPreference = isset($options['readPreference']) ? $options['readPreference'] : $this->manager->getReadPreference();
-        $this->typeMap = isset($options['typeMap']) ? $options['typeMap'] : self::$defaultTypeMap;
-        $this->writeConcern = isset($options['writeConcern']) ? $options['writeConcern'] : $this->manager->getWriteConcern();
+        $this->readConcern = $options['readConcern'] ?? $this->manager->getReadConcern();
+        $this->readPreference = $options['readPreference'] ?? $this->manager->getReadPreference();
+        $this->typeMap = $options['typeMap'] ?? self::$defaultTypeMap;
+        $this->writeConcern = $options['writeConcern'] ?? $this->manager->getWriteConcern();
 
         $collectionOptions = array_intersect_key($options, ['readConcern' => 1, 'readPreference' => 1, 'typeMap' => 1, 'writeConcern' => 1]);
 
@@ -688,7 +688,7 @@ class Bucket
         $metadata = stream_get_meta_data($stream);
 
         if (! isset($metadata['wrapper_data']) || ! $metadata['wrapper_data'] instanceof StreamWrapper) {
-            throw InvalidArgumentException::invalidType('$stream wrapper data', isset($metadata['wrapper_data']) ? $metadata['wrapper_data'] : null, StreamWrapper::class);
+            throw InvalidArgumentException::invalidType('$stream wrapper data', $metadata['wrapper_data'] ?? null, StreamWrapper::class);
         }
 
         return $metadata['wrapper_data']->getFile();

src/GridFS/StreamWrapper.php

@@ -17,9 +17,9 @@
 
 namespace MongoDB\GridFS;
 
-use Exception;
 use MongoDB\BSON\UTCDateTime;
 use stdClass;
+use Throwable;
 use function explode;
 use function get_class;
 use function in_array;
@@ -150,7 +150,7 @@ class StreamWrapper
 
         try {
             return $this->stream->readBytes($length);
-        } catch (Exception $e) {
+        } catch (Throwable $e) {
             trigger_error(sprintf('%s: %s', get_class($e), $e->getMessage()), E_USER_WARNING);
 
             return false;
@@ -247,7 +247,7 @@ class StreamWrapper
 
         try {
             return $this->stream->writeBytes($data);
-        } catch (Exception $e) {
+        } catch (Throwable $e) {
             trigger_error(sprintf('%s: %s', get_class($e), $e->getMessage()), E_USER_WARNING);
 
             return false;

src/Model/ChangeStreamIterator.php

@@ -230,8 +230,8 @@ class ChangeStreamIterator extends IteratorIterator implements CommandSubscriber
         }
 
         $resumeToken = is_array($document)
-            ? (isset($document['_id']) ? $document['_id'] : null)
-            : (isset($document->_id) ? $document->_id : null);
+            ? ($document['_id'] ?? null)
+            : ($document->_id ?? null);
 
         if (! isset($resumeToken)) {
             $this->isValid = false;

src/Operation/Aggregate.php

@@ -325,7 +325,7 @@ class Aggregate implements Executable
     private function createCommand(Server $server, $hasWriteStage)
     {
         $cmd = [
-            'aggregate' => isset($this->collectionName) ? $this->collectionName : 1,
+            'aggregate' => $this->collectionName ?? 1,
             'pipeline' => $this->pipeline,
         ];
         $cmdOptions = [];

src/Operation/FindAndModify.php

@@ -243,7 +243,7 @@ class FindAndModify implements Executable, Explainable
 
         $result = current($cursor->toArray());
 
-        return isset($result->value) ? $result->value : null;
+        return $result->value ?? null;
     }
 
     public function getCommandDocument(Server $server)

src/Operation/WithTransaction.php

@@ -5,6 +5,7 @@ namespace MongoDB\Operation;
 use Exception;
 use MongoDB\Driver\Exception\RuntimeException;
 use MongoDB\Driver\Session;
+use Throwable;
 use function call_user_func;
 use function time;
 
@@ -63,7 +64,7 @@ class WithTransaction
 
             try {
                 call_user_func($this->callback, $session);
-            } catch (Exception $e) {
+            } catch (Throwable $e) {
                 if ($session->isInTransaction()) {
                     $session->abortTransaction();
                 }

tests/Collection/CrudSpecFunctionalTest.php

@@ -57,7 +57,7 @@ class CrudSpecFunctionalTest extends FunctionalTestCase
             $this->checkServerVersion($minServerVersion, $maxServerVersion);
         }
 
-        $expectedData = isset($test['outcome']['collection']['data']) ? $test['outcome']['collection']['data'] : null;
+        $expectedData = $test['outcome']['collection']['data'] ?? null;
         $this->initializeData($initialData, $expectedData);
 
         if (isset($test['outcome']['collection']['name'])) {
@@ -84,8 +84,8 @@ class CrudSpecFunctionalTest extends FunctionalTestCase
         foreach (glob(__DIR__ . '/spec-tests/*/*.json') as $filename) {
             $json = json_decode(file_get_contents($filename), true);
 
-            $minServerVersion = isset($json['minServerVersion']) ? $json['minServerVersion'] : null;
-            $maxServerVersion = isset($json['maxServerVersion']) ? $json['maxServerVersion'] : null;
+            $minServerVersion = $json['minServerVersion'] ?? null;
+            $maxServerVersion = $json['maxServerVersion'] ?? null;
 
             foreach ($json['tests'] as $test) {
                 $name = str_replace(' ', '_', $test['description']);
@@ -152,13 +152,13 @@ class CrudSpecFunctionalTest extends FunctionalTestCase
             case 'bulkWrite':
                 return $this->collection->bulkWrite(
                     array_map([$this, 'prepareBulkWriteRequest'], $operation['arguments']['requests']),
-                    isset($operation['arguments']['options']) ? $operation['arguments']['options'] : []
+                    $operation['arguments']['options'] ?? []
                 );
             case 'count':
             case 'countDocuments':
             case 'find':
                 return $this->collection->{$operation['name']}(
-                    isset($operation['arguments']['filter']) ? $operation['arguments']['filter'] : [],
+                    $operation['arguments']['filter'] ?? [],
                     array_diff_key($operation['arguments'], ['filter' => 1])
                 );
             case 'estimatedDocumentCount':
@@ -173,7 +173,7 @@ class CrudSpecFunctionalTest extends FunctionalTestCase
             case 'distinct':
                 return $this->collection->distinct(
                     $operation['arguments']['fieldName'],
-                    isset($operation['arguments']['filter']) ? $operation['arguments']['filter'] : [],
+                    $operation['arguments']['filter'] ?? [],
                     array_diff_key($operation['arguments'], ['fieldName' => 1, 'filter' => 1])
                 );
             case 'findOneAndReplace':
@@ -200,7 +200,7 @@ class CrudSpecFunctionalTest extends FunctionalTestCase
             case 'insertMany':
                 return $this->collection->insertMany(
                     $operation['arguments']['documents'],
-                    isset($operation['arguments']['options']) ? $operation['arguments']['options'] : []
+                    $operation['arguments']['options'] ?? []
                 );
             case 'insertOne':
                 return $this->collection->insertOne(
@@ -263,7 +263,7 @@ class CrudSpecFunctionalTest extends FunctionalTestCase
     {
         switch ($operation['name']) {
             case 'bulkWrite':
-                $insertedIds = isset($outcome['result']['insertedIds']) ? $outcome['result']['insertedIds'] : [];
+                $insertedIds = $outcome['result']['insertedIds'] ?? [];
 
                 if ($exception instanceof BulkWriteException) {
                     return new BulkWriteResult($exception->getWriteResult(), $insertedIds);
@@ -271,7 +271,7 @@ class CrudSpecFunctionalTest extends FunctionalTestCase
                 break;
 
             case 'insertMany':
-                $insertedIds = isset($outcome['result']['insertedIds']) ? $outcome['result']['insertedIds'] : [];
+                $insertedIds = $outcome['result']['insertedIds'] ?? [];
 
                 if ($exception instanceof BulkWriteException) {
                     return new InsertManyResult($exception->getWriteResult(), $insertedIds);

tests/CommandObserver.php

@@ -2,11 +2,11 @@
 
 namespace MongoDB\Tests;
 
-use Exception;
 use MongoDB\Driver\Monitoring\CommandFailedEvent;
 use MongoDB\Driver\Monitoring\CommandStartedEvent;
 use MongoDB\Driver\Monitoring\CommandSubscriber;
 use MongoDB\Driver\Monitoring\CommandSucceededEvent;
+use Throwable;
 use function call_user_func;
 use function MongoDB\Driver\Monitoring\addSubscriber;
 use function MongoDB\Driver\Monitoring\removeSubscriber;
@@ -27,7 +27,7 @@ class CommandObserver implements CommandSubscriber
 
         try {
             call_user_func($execution);
-        } catch (Exception $executionException) {
+        } catch (Throwable $executionException) {
         }
 
         removeSubscriber($this);

tests/GridFS/ReadableStreamFunctionalTest.php

@@ -136,7 +136,7 @@ class ReadableStreamFunctionalTest extends FunctionalTestCase
         $fileDocument = $this->collectionWrapper->findFileById($fileId);
         $stream = new ReadableStream($this->collectionWrapper, $fileDocument);
         for ($i = 0; $i < $length; $i++) {
-            $expectedByte = isset($expectedBytes[$i]) ? $expectedBytes[$i] : '';
+            $expectedByte = $expectedBytes[$i] ?? '';
             $this->assertSame($expectedByte, $stream->readBytes(1));
         }
     }

tests/GridFS/SpecFunctionalTest.php

@@ -3,7 +3,6 @@
 namespace MongoDB\Tests\GridFS;
 
 use DateTime;
-use Exception;
 use IteratorIterator;
 use LogicException;
 use MongoDB\BSON\Binary;
@@ -15,6 +14,7 @@ use MongoDB\Operation\BulkWrite;
 use MultipleIterator;
 use PHPUnit\Framework\Error\Warning;
 use Symfony\Bridge\PhpUnit\SetUpTearDownTrait;
+use Throwable;
 use function array_walk;
 use function array_walk_recursive;
 use function file_get_contents;
@@ -70,7 +70,7 @@ class SpecFunctionalTest extends FunctionalTestCase
 
         try {
             $result = $this->executeAct($test['act']);
-        } catch (Exception $e) {
+        } catch (Throwable $e) {
             $result = $e;
         }
 
@@ -211,13 +211,13 @@ class SpecFunctionalTest extends FunctionalTestCase
             case 'download_by_name':
                 return stream_get_contents($this->bucket->openDownloadStreamByName(
                     $act['arguments']['filename'],
-                    isset($act['arguments']['options']) ? $act['arguments']['options'] : []
+                    $act['arguments']['options'] ?? []
                 ));
             case 'upload':
                 return $this->bucket->uploadFromStream(
                     $act['arguments']['filename'],
                     $this->createStream($act['arguments']['source']),
-                    isset($act['arguments']['options']) ? $act['arguments']['options'] : []
+                    $act['arguments']['options'] ?? []
                 );
             default:
                 throw new LogicException('Unsupported act: ' . $act['operation']);

tests/Model/CachingIteratorTest.php

@@ -5,6 +5,7 @@ namespace MongoDB\Tests\Model;
 use Exception;
 use MongoDB\Model\CachingIterator;
 use MongoDB\Tests\TestCase;
+use Throwable;
 use function iterator_to_array;
 
 class CachingIteratorTest extends TestCase
@@ -14,7 +15,7 @@ class CachingIteratorTest extends TestCase
         $iterator = $this->getTraversable([1, 2, 3]);
         $this->assertSame([1, 2, 3], iterator_to_array($iterator));
 
-        $this->expectException(Exception::class);
+        $this->expectException(Throwable::class);
         $this->expectExceptionMessage('Cannot traverse an already closed generator');
         iterator_to_array($iterator);
     }

tests/SpecTests/ChangeStreamsSpecTest.php

@@ -149,10 +149,10 @@ class ChangeStreamsSpecTest extends FunctionalTestCase
         foreach (glob(__DIR__ . '/change-streams/*.json') as $filename) {
             $json = $this->decodeJson(file_get_contents($filename));
             $group = basename($filename, '.json');
-            $databaseName = isset($json->database_name) ? $json->database_name : null;
-            $database2Name = isset($json->database2_name) ? $json->database2_name : null;
-            $collectionName = isset($json->collection_name) ? $json->collection_name : null;
-            $collection2Name = isset($json->collection2_name) ? $json->collection2_name : null;
+            $databaseName = $json->database_name ?? null;
+            $database2Name = $json->database2_name ?? null;
+            $collectionName = $json->collection_name ?? null;
+            $collection2Name = $json->collection2_name ?? null;
 
             foreach ($json->tests as $test) {
                 $name = $group . ': ' . $test->description;
@@ -173,7 +173,7 @@ class ChangeStreamsSpecTest extends FunctionalTestCase
     private function createChangeStream(stdClass $test)
     {
         $context = $this->getContext();
-        $pipeline = isset($test->changeStreamPipeline) ? $test->changeStreamPipeline : [];
+        $pipeline = $test->changeStreamPipeline ?? [];
         $options = isset($test->changeStreamOptions) ? (array) $test->changeStreamOptions : [];
 
         switch ($test->target) {

tests/SpecTests/ClientSideEncryptionSpecTest.php

@@ -3,7 +3,6 @@
 namespace MongoDB\Tests\SpecTests;
 
 use Closure;
-use Exception;
 use MongoDB\BSON\Binary;
 use MongoDB\BSON\Int64;
 use MongoDB\Client;
@@ -20,6 +19,7 @@ use MongoDB\Tests\CommandObserver;
 use PHPUnit\Framework\SkippedTestError;
 use stdClass;
 use Symfony\Bridge\PhpUnit\SetUpTearDownTrait;
+use Throwable;
 use UnexpectedValueException;
 use function base64_decode;
 use function basename;
@@ -83,8 +83,8 @@ class ClientSideEncryptionSpecTest extends FunctionalTestCase
             $this->markTestSkipped($test->skipReason);
         }
 
-        $databaseName = isset($databaseName) ? $databaseName : $this->getDatabaseName();
-        $collectionName = isset($collectionName) ? $collectionName : $this->getCollectionName();
+        $databaseName = $databaseName ?? $this->getDatabaseName();
+        $collectionName = $collectionName ?? $this->getCollectionName();
 
         try {
             $context = Context::fromClientSideEncryption($test, $databaseName, $collectionName);
@@ -135,7 +135,7 @@ class ClientSideEncryptionSpecTest extends FunctionalTestCase
 
             try {
                 $json = $this->decodeJson(file_get_contents($filename));
-            } catch (Exception $e) {
+            } catch (Throwable $e) {
                 $testArgs[$group] = [
                     (object) ['skipReason' => sprintf('Exception loading file "%s": %s', $filename, $e->getMessage())],
                     null,
@@ -145,12 +145,12 @@ class ClientSideEncryptionSpecTest extends FunctionalTestCase
                 continue;
             }
 
-            $runOn = isset($json->runOn) ? $json->runOn : null;
-            $data = isset($json->data) ? $json->data : [];
-            $keyVaultData = isset($json->key_vault_data) ? $json->key_vault_data : null;
-            $jsonSchema = isset($json->json_schema) ? $json->json_schema : null;
-            $databaseName = isset($json->database_name) ? $json->database_name : null;
-            $collectionName = isset($json->collection_name) ? $json->collection_name : null;
+            $runOn = $json->runOn ?? null;
+            $data = $json->data ?? [];
+            $keyVaultData = $json->key_vault_data ?? null;
+            $jsonSchema = $json->json_schema ?? null;
+            $databaseName = $json->database_name ?? null;
+            $collectionName = $json->collection_name ?? null;
 
             foreach ($json->tests as $test) {
                 $name = $group . ': ' . $test->description;
@@ -211,6 +211,7 @@ class ClientSideEncryptionSpecTest extends FunctionalTestCase
             'local' => [
                 static function (ClientEncryption $clientEncryption, Client $client, Client $clientEncrypted, self $test) {
                     $commands = [];
+
                     $localDatakeyId = null;
 
                     (new CommandObserver())->observe(

tests/SpecTests/CommandMonitoringSpecTest.php

@@ -145,8 +145,8 @@ class CommandMonitoringSpecTest extends FunctionalTestCase
     {
         $this->checkServerRequirements($this->createRunOn($test));
 
-        $databaseName = isset($databaseName) ? $databaseName : $this->getDatabaseName();
-        $collectionName = isset($collectionName) ? $collectionName : $this->getCollectionName();
+        $databaseName = $databaseName ?? $this->getDatabaseName();
+        $collectionName = $collectionName ?? $this->getCollectionName();
 
         $context = Context::fromCommandMonitoring($test, $databaseName, $collectionName);
         $this->setContext($context);
@@ -174,9 +174,9 @@ class CommandMonitoringSpecTest extends FunctionalTestCase
         foreach (glob(__DIR__ . '/command-monitoring/*.json') as $filename) {
             $json = $this->decodeJson(file_get_contents($filename));
             $group = basename($filename, '.json');
-            $data = isset($json->data) ? $json->data : [];
-            $databaseName = isset($json->database_name) ? $json->database_name : null;
-            $collectionName = isset($json->collection_name) ? $json->collection_name : null;
+            $data = $json->data ?? [];
+            $databaseName = $json->database_name ?? null;
+            $collectionName = $json->collection_name ?? null;
 
             foreach ($json->tests as $test) {
                 $name = $group . ': ' . $test->description;

tests/SpecTests/Context.php

@@ -316,8 +316,8 @@ final class Context
             }
 
             $w = $writeConcern['w'];
-            $wtimeout = isset($writeConcern['wtimeout']) ? $writeConcern['wtimeout'] : 0;
-            $j = isset($writeConcern['j']) ? $writeConcern['j'] : null;
+            $wtimeout = $writeConcern['wtimeout'] ?? 0;
+            $j = $writeConcern['j'] ?? null;
 
             $options['writeConcern'] = isset($j)
                 ? new WriteConcern($w, $wtimeout, $j)

tests/SpecTests/CrudSpecTest.php

@@ -45,8 +45,8 @@ class CrudSpecTest extends FunctionalTestCase
             $this->markTestSkipped($test->skipReason);
         }
 
-        $databaseName = isset($databaseName) ? $databaseName : $this->getDatabaseName();
-        $collectionName = isset($collectionName) ? $collectionName : $this->getCollectionName();
+        $databaseName = $databaseName ?? $this->getDatabaseName();
+        $collectionName = $collectionName ?? $this->getCollectionName();
 
         $context = Context::fromCrud($test, $databaseName, $collectionName);
         $this->setContext($context);
@@ -84,10 +84,10 @@ class CrudSpecTest extends FunctionalTestCase
         foreach (glob(__DIR__ . '/crud/*.json') as $filename) {
             $json = $this->decodeJson(file_get_contents($filename));
             $group = basename($filename, '.json');
-            $runOn = isset($json->runOn) ? $json->runOn : null;
-            $data = isset($json->data) ? $json->data : [];
-            $databaseName = isset($json->database_name) ? $json->database_name : null;
-            $collectionName = isset($json->collection_name) ? $json->collection_name : null;
+            $runOn = $json->runOn ?? null;
+            $data = $json->data ?? [];
+            $databaseName = $json->database_name ?? null;
+            $collectionName = $json->collection_name ?? null;
 
             foreach ($json->tests as $test) {
                 $name = $group . ': ' . $test->description;

tests/SpecTests/ErrorExpectation.php

@@ -10,6 +10,7 @@ use MongoDB\Driver\Exception\RuntimeException;
 use MongoDB\Exception\InvalidArgumentException;
 use MongoDB\Tests\TestCase;
 use stdClass;
+use Throwable;
 use function get_class;
 use function is_array;
 use function is_string;
@@ -132,7 +133,7 @@ final class ErrorExpectation
      * @param TestCase       $test   Test instance for performing assertions
      * @param Exception|null $actual Exception (if any) from the actual outcome
      */
-    public function assert(TestCase $test, Exception $actual = null)
+    public function assert(TestCase $test, Throwable $actual = null)
     {
         if (! $this->isExpected) {
             if ($actual !== null) {
@@ -176,7 +177,7 @@ final class ErrorExpectation
      * @param TestCase       $test   Test instance for performing assertions
      * @param Exception|null $actual Exception (if any) from the actual outcome
      */
-    private function assertCodeName(TestCase $test, Exception $actual = null)
+    private function assertCodeName(TestCase $test, Throwable $actual = null)
     {
         /* BulkWriteException does not expose codeName for server errors. Work
          * around this be comparing the error code against a map.
@@ -214,7 +215,7 @@ final class ErrorExpectation
             $o->isExpected = $operation->error;
         }
 
-        $result = isset($operation->result) ? $operation->result : null;
+        $result = $operation->result ?? null;
 
         if (isset($result->errorContains)) {
             $o->messageContains = $result->errorContains;

tests/SpecTests/FunctionalTestCase.php

@@ -137,9 +137,9 @@ class FunctionalTestCase extends BaseFunctionalTestCase
     protected function checkServerRequirements(array $runOn)
     {
         foreach ($runOn as $req) {
-            $minServerVersion = isset($req->minServerVersion) ? $req->minServerVersion : null;
-            $maxServerVersion = isset($req->maxServerVersion) ? $req->maxServerVersion : null;
-            $topologies = isset($req->topology) ? $req->topology : null;
+            $minServerVersion = $req->minServerVersion ?? null;
+            $maxServerVersion = $req->maxServerVersion ?? null;
+            $topologies = $req->topology ?? null;
 
             if ($this->isServerRequirementSatisifed($minServerVersion, $maxServerVersion, $topologies)) {
                 return;

tests/SpecTests/Operation.php

@@ -322,7 +322,7 @@ final class Operation
                 return $client->listDatabases($args);
             case 'watch':
                 return $client->watch(
-                    isset($args['pipeline']) ? $args['pipeline'] : [],
+                    $args['pipeline'] ?? [],
                     array_diff_key($args, ['pipeline' => 1])
                 );
             default:
@@ -363,7 +363,7 @@ final class Operation
             case 'countDocuments':
             case 'find':
                 return $collection->{$this->name}(
-                    isset($args['filter']) ? $args['filter'] : [],
+                    $args['filter'] ?? [],
                     array_diff_key($args, ['filter' => 1])
                 );
             case 'estimatedDocumentCount':
@@ -378,7 +378,7 @@ final class Operation
             case 'distinct':
                 return $collection->distinct(
                     $args['fieldName'],
-                    isset($args['filter']) ? $args['filter'] : [],
+                    $args['filter'] ?? [],
                     array_diff_key($args, ['fieldName' => 1, 'filter' => 1])
                 );
             case 'drop':
@@ -439,7 +439,7 @@ final class Operation
                 );
             case 'watch':
                 return $collection->watch(
-                    isset($args['pipeline']) ? $args['pipeline'] : [],
+                    $args['pipeline'] ?? [],
                     array_diff_key($args, ['pipeline' => 1])
                 );
             default:
@@ -475,7 +475,7 @@ final class Operation
                 )->toArray()[0];
             case 'watch':
                 return $database->watch(
-                    isset($args['pipeline']) ? $args['pipeline'] : [],
+                    $args['pipeline'] ?? [],
                     array_diff_key($args, ['pipeline' => 1])
                 );
             default:

tests/SpecTests/RetryableReadsSpecTest.php

@@ -107,11 +107,11 @@ class RetryableReadsSpecTest extends FunctionalTestCase
         foreach (glob(__DIR__ . '/retryable-reads/*.json') as $filename) {
             $json = $this->decodeJson(file_get_contents($filename));
             $group = basename($filename, '.json');
-            $runOn = isset($json->runOn) ? $json->runOn : null;
-            $data = isset($json->data) ? $json->data : [];
-            $databaseName = isset($json->database_name) ? $json->database_name : null;
-            $collectionName = isset($json->collection_name) ? $json->collection_name : null;
-            $bucketName = isset($json->bucket_name) ? $json->bucket_name : null;
+            $runOn = $json->runOn ?? null;
+            $data = $json->data ?? [];
+            $databaseName = $json->database_name ?? null;
+            $collectionName = $json->collection_name ?? null;
+            $bucketName = $json->bucket_name ?? null;
 
             foreach ($json->tests as $test) {
                 $name = $group . ': ' . $test->description;

tests/SpecTests/RetryableWritesSpecTest.php

@@ -58,8 +58,8 @@ class RetryableWritesSpecTest extends FunctionalTestCase
         foreach (glob(__DIR__ . '/retryable-writes/*.json') as $filename) {
             $json = $this->decodeJson(file_get_contents($filename));
             $group = basename($filename, '.json');
-            $runOn = isset($json->runOn) ? $json->runOn : null;
-            $data = isset($json->data) ? $json->data : [];
+            $runOn = $json->runOn ?? null;
+            $data = $json->data ?? [];
 
             foreach ($json->tests as $test) {
                 $name = $group . ': ' . $test->description;

tests/SpecTests/TransactionsSpecTest.php

@@ -144,8 +144,8 @@ class TransactionsSpecTest extends FunctionalTestCase
             $this->markTestSkipped($test->skipReason);
         }
 
-        $databaseName = isset($databaseName) ? $databaseName : $this->getDatabaseName();
-        $collectionName = isset($collectionName) ? $collectionName : $this->getCollectionName();
+        $databaseName = $databaseName ?? $this->getDatabaseName();
+        $collectionName = $collectionName ?? $this->getCollectionName();
 
         $context = Context::fromTransactions($test, $databaseName, $collectionName, $useMultipleMongoses);
         $this->setContext($context);
@@ -188,10 +188,10 @@ class TransactionsSpecTest extends FunctionalTestCase
         foreach (glob(__DIR__ . '/transactions*/*.json') as $filename) {
             $json = $this->decodeJson(file_get_contents($filename));
             $group = basename(dirname($filename)) . '/' . basename($filename, '.json');
-            $runOn = isset($json->runOn) ? $json->runOn : null;
-            $data = isset($json->data) ? $json->data : [];
-            $databaseName = isset($json->database_name) ? $json->database_name : null;
-            $collectionName = isset($json->collection_name) ? $json->collection_name : null;
+            $runOn = $json->runOn ?? null;
+            $data = $json->data ?? [];
+            $databaseName = $json->database_name ?? null;
+            $collectionName = $json->collection_name ?? null;
 
             foreach ($json->tests as $test) {
                 $name = $group . ': ' . $test->description;