chore(core/test): Add input flow test for ERC20 approve

[no changelog]

tests/device_tests/ethereum/test_signtx.py

@@ -23,6 +23,7 @@ from trezorlib.tools import parse_path, unharden
 
 from ...common import parametrize_using_common_fixtures
 from ...input_flows import (
+    InputFlowErc20Approve,
     InputFlowEthereumSignTxGoBack,
     InputFlowEthereumSignTxScrollDown,
     InputFlowEthereumSignTxSkip,
@@ -392,3 +393,25 @@ def test_signtx_data_pagination(client: Client, flow):
         client.watch_layout()
         client.set_input_flow(flow(client, cancel=True))
         _sign_tx_call()
+
+
+@pytest.mark.skip_t1
+def test_ethereum_sign_erc20_approve(client: Client):
+    with client:
+        client.watch_layout()
+        IF = InputFlowErc20Approve(client)
+        client.set_input_flow(IF.get())
+        ethereum.sign_tx(
+            client,
+            n=parse_path("m/44h/60h/0h/0/0"),
+            nonce=0x0,
+            gas_price=0x14,
+            gas_limit=0x14,
+            to="0xfc6b5d6af8a13258f7cbd0d39e11b35e01a32f93",
+            chain_id=1,
+            value=0x0,
+            tx_type=None,
+            data=bytes.fromhex(
+                "095ea7b300000000000000000000000012345678901234567890123456789012345678900000000000000000000000000000000000000000000000056bc75e2d63100000"
+            ),
+        )

tests/input_flows.py

@@ -1318,6 +1318,38 @@ class InputFlowBip39RecoveryDryRun(InputFlowBase):
         self.debug.press_yes()
 
 
+class InputFlowErc20Approve(InputFlowBase):
+    def __init__(self, client: Client):
+        super().__init__(client)
+
+    def input_flow_tt(self) -> GeneratorType:
+        br = yield
+        assert br.code == messages.ButtonRequestType.Other
+        assert "CONFIRM APPROVE" == self.layout().title()
+        assert (
+            "Allow 0x123456789012345- 67890123456789012- 34567890 to withdraw up to 100,000,000,000,0"
+            in self.layout().text_content()
+        )
+        self.debug.swipe_up()
+
+        assert br.code == messages.ButtonRequestType.Other
+        assert "CONFIRM APPROVE" == self.layout().title()
+        assert "00,000,000 Wei UNKN" in self.layout().text_content()
+        self.debug.press_yes()
+
+        yield
+        assert br.code == messages.ButtonRequestType.Other
+        assert "CONFIRM FEE" == self.layout().title()
+        assert "Gas price: 20 Wei ETH" in self.layout().text_content()
+        self.debug.press_yes()
+
+        yield
+        assert br.code == messages.ButtonRequestType.Other
+        assert "TOTAL" == self.layout().title()
+        assert "Maximum fee: 400 Wei ETH" in self.layout().text_content()
+        self.debug.press_yes()
+
+
 class InputFlowBip39RecoveryDryRunInvalid(InputFlowBase):
     def __init__(self, client: Client):
         super().__init__(client)