Apply suggestions from code review

Author: DenTray

tests/CommandTest.php

@@ -50,7 +50,7 @@ public function testCallCommand()
         Carbon::setTestNow('2016-10-20 11:05:00');
 
         $this->mockGenerator();
-        $this->mockGettingModelInstance(new Post);
+        $this->mockGettingModelInstance(new Post());
         $this->mockDBTransactionStartRollback(2);
 
         $this

tests/NovaResourceGeneratorTest.php

@@ -115,7 +115,7 @@ public function testSuccessWithoutCommandLineFields()
     {
         $this->mockNovaServiceProviderExists();
 
-        $this->mockGettingModelInstance(new Post);
+        $this->mockGettingModelInstance(new Post());
 
         app(NovaResourceGenerator::class)
             ->setModel('Post')

tests/Support/GeneratorMockTrait.php

@@ -64,7 +64,6 @@ public function mockDBTransactionStartRollback(int $count = 1): void
     public function mockGettingModelInstance(object $model): void
     {
         $laravelConnectionMock = Mockery::mock(LaravelConnection::class);
-        $laravelConnectionMock
             ->shouldReceive('getConfig')
             ->andReturn([
                 'database' => 'my_db',
@@ -79,12 +78,11 @@ public function mockGettingModelInstance(object $model): void
             ->andReturn($laravelConnectionMock);
 
         $schemaManagerMock = Mockery::mock(AbstractSchemaManager::class);
-        $schemaManagerMock
             ->shouldReceive('listTableColumns')
             ->andReturn([
-                new Column('id', new IntegerType),
-                new Column('title', new StringType),
-                new Column('created_at', new DateTimeType),
+                new Column('id', new IntegerType()),
+                new Column('title', new StringType()),
+                new Column('created_at', new DateTimeType()),
             ]);
 
         $connectionMock = Mockery::mock(Connection::class)->makePartial();
@@ -93,7 +91,6 @@ public function mockGettingModelInstance(object $model): void
             ->andReturn($schemaManagerMock);
 
         $driverManagerMock = Mockery::mock('alias:' . DriverManager::class);
-        $driverManagerMock
             ->shouldReceive('getConnection')
             ->with([
                 'dbname' => 'my_db',