from django.test import TestCase
from rest_framework.test import APIClient    

class FileUploadTestCase(TestCase):  
    def test_upload(self):
        client = APIClient()
        client.credentials(HTTP_AUTHORIZATION='Token ' + self.token.key)
        
        # or self.client (Django https://docs.djangoproject.com/en/dev/topics/testing/advanced/)
        response = client.post(reverse('upload-file'), {
            "image": open("tests/test.png", "rb"),            
            "name": "test"
        })

        self.assertEqual(200, response.status_code)