feat(buy): send products list to buy view.

tienda_ilusion/don_confiao/tests/test_buy_form.py

@@ -0,0 +1,22 @@
+from django.test import Client, TestCase
+from ..models import Product
+
+
+class TestBuyForm(TestCase):
+    def setUp(self):
+        self.client = Client()
+        self.product = Product()
+        self.product.name = "Arroz"
+        self.product.price = 5000
+        self.product.save()
+
+    def test_buy_contains_products_list(self):
+        response = self.client.get('/don_confiao/comprar')
+        self.assertIn(
+            self.product.name,
+            response.context['list_products']
+        )
+        content = response.content.decode('utf-8')
+        self.assertIn('5000', content)
+        self.assertIn('Arroz', content)
+        self.assertIn(str(self.product.id), content)