Fix token transfers tests

apps/block_scout_web/test/block_scout_web/controllers/tokens/instance/transfer_controller_test.exs

@@ -2,43 +2,29 @@ defmodule BlockScoutWeb.Tokens.Instance.TransferControllerTest do
   use BlockScoutWeb.ConnCase, async: false
 
   describe "GET token-transfers/2" do
-    test "works for ERC-721 tokens", %{conn: conn} do
+    test "fetches the instance", %{conn: conn} do
       contract_address = insert(:address)
 
       insert(:token, contract_address: contract_address)
 
-      token_id = 10
+      contract_address_hash = contract_address.hash
 
-      %{log_index: log_index} =
-        insert(:token_transfer,
-          from_address: contract_address,
-          token_contract_address: contract_address,
-          token_id: token_id
-        )
-
-      conn = get(conn, "/token/#{contract_address.hash}/instance/#{token_id}/token-transfers")
+      token_id = Decimal.new(10)
 
-      assert %{assigns: %{token_instance: %{log_index: ^log_index}}} = conn
-    end
-
-    test "works for ERC-1155 tokens", %{conn: conn} do
-      contract_address = insert(:address)
-
-      insert(:token, contract_address: contract_address)
-
-      token_id = 10
-
-      %{log_index: log_index} =
-        insert(:token_transfer,
-          from_address: contract_address,
-          token_contract_address: contract_address,
-          token_id: nil,
-          token_ids: [token_id]
+      insert(:token_instance,
+        token_contract_address_hash: contract_address_hash,
+        token_id: token_id
       )
 
-      conn = get(conn, "/token/#{contract_address.hash}/instance/#{token_id}/token-transfers")
+      conn = get(conn, "/token/#{contract_address_hash}/instance/#{token_id}/token-transfers")
 
-      assert %{assigns: %{token_instance: %{log_index: ^log_index}}} = conn
+      assert %{
+               assigns: %{
+                 token_instance: %{
+                   instance: %{token_contract_address_hash: ^contract_address_hash, token_id: ^token_id}
+                 }
+               }
+             } = conn
     end
   end
 end