public function testAddFieldToFilterStore() { $storeId = 1; $expectedFilter = new DataObject(['field' => 'store', 'value' => ['in' => [1]], 'type' => 'public']); $this->assertSame($this->collection, $this->collection->addFieldToFilter('store_id', $storeId)); // addition call to make sure that correct value was set to filter $this->assertEquals($expectedFilter, $this->collection->getFilter('store')); }