Fix missing mock expectation for tests

Author: Marc-Etienne Barrut

tests/Database/DatabaseEloquentModelTest.php

@@ -2153,6 +2153,7 @@ protected function addMockConnection($model)
         $model->setConnectionResolver($resolver = m::mock(ConnectionResolverInterface::class));
         $resolver->shouldReceive('connection')->andReturn($connection = m::mock(Connection::class));
         $connection->shouldReceive('getQueryGrammar')->andReturn($grammar = m::mock(Grammar::class));
+        $grammar->shouldReceive('getBinaryOperators')->andReturn([]);
         $connection->shouldReceive('getPostProcessor')->andReturn($processor = m::mock(Processor::class));
         $connection->shouldReceive('query')->andReturnUsing(function () use ($connection, $grammar, $processor) {
             return new BaseBuilder($connection, $grammar, $processor);
@@ -2440,6 +2441,7 @@ public function getConnection()
     {
         $mock = m::mock(Connection::class);
         $mock->shouldReceive('getQueryGrammar')->andReturn($grammar = m::mock(Grammar::class));
+        $grammar->shouldReceive('getBinaryOperators')->andReturn([]);
         $mock->shouldReceive('getPostProcessor')->andReturn($processor = m::mock(Processor::class));
         $mock->shouldReceive('getName')->andReturn('name');
         $mock->shouldReceive('query')->andReturnUsing(function () use ($mock, $grammar, $processor) {