AutistMask/tests/sendAmountRule.test.js

// The Send screen refuses every amount the confirmation screen would refuse,
// by the same check (https://git.eeqj.de/sneak/AutistMask/issues/532).
//
// Send used to accept anything parseFloat() read as above zero, so "1e-3",
// "1abc" and an amount with more decimal places than the token has went on to
// a confirmation screen that then refused them. Both screens now call
// isValidAmount() in src/shared/txValidation.js.
//
// Driven through the real Send review handler and the real confirmation
// screen, with only the node and the DOM stubbed.

"use strict";

jest.mock("../src/shared/log", () => ({
    log: {
        debugf: () => {},
        infof: () => {},
        warnf: () => {},
        errorf: () => {},
    },
    debugFetch: jest.fn(),
    setRuntimeDebug: () => {},
    isDebug: () => false,
}));

const { AbiCoder } = require("ethers");

// What the confirmation screen asks the node for. The address holds the 1 ETH
// and 250 TOK the wallet below records.
const mockProvider = {
    getFeeData: async () => ({
        maxFeePerGas: 2000000000n,
        gasPrice: 1000000000n,
    }),
    estimateGas: async () => 21000n,
    getCode: async () => "0x",
    getTransactionCount: async () => 1,
    getBalance: async () => 1000000000000000000n,
    // The one contract call the screen makes, balanceOf(), answered at the
    // token's 6 decimal places.
    call: async () =>
        AbiCoder.defaultAbiCoder().encode(["uint256"], [250000000n]),
};

jest.mock("../src/shared/balances", () => {
    const actual = jest.requireActual("../src/shared/balances");
    return { ...actual, getProvider: () => mockProvider };
});

// The confirmation screen's Etherscan label lookup fails, as it does offline.
global.fetch = jest.fn(() => {
    throw new Error("tests must not perform network requests");
});

const { makeStorageStub } = require("./support/storageStub");
global.chrome = { storage: makeStorageStub(), runtime: { sendMessage() {} } };

// A stub DOM: every id resolves to a recording element.
const elements = new Map();

function makeEl(id) {
    const handlers = new Map();
    return {
        id,
        textContent: "",
        innerHTML: "",
        value: "",
        disabled: false,
        style: {},
        dataset: {},
        classList: {
            add() {},
            remove() {},
            toggle() {},
            contains: () => false,
        },
        handlers,
        addEventListener(name, fn) {
            handlers.set(name, fn);
        },
        appendChild(child) {
            return child;
        },
        querySelectorAll: () => [],
        querySelector: () => null,
        remove() {},
        focus() {},
    };
}

global.document = {
    getElementById(id) {
        if (!elements.has(id)) elements.set(id, makeEl(id));
        return elements.get(id);
    },
    createElement: (tag) => makeEl(tag),
    body: { prepend() {}, appendChild() {} },
    addEventListener() {},
};
global.navigator = { clipboard: { writeText() {} } };

const { state } = require("../src/shared/state");
const send = require("../src/popup/views/send");
const confirmTx = require("../src/popup/views/confirmTx");

const HOLDER = "0x" + "a".repeat(40);
const RECIPIENT = "0xC0FfEE0000000000000000000000000000c0fFEe";
// A token with 6 decimal places, as USDC has.
const TOKEN = "0x" + "d".repeat(40);
const TOKEN_BY_SYMBOL = { ETH: "ETH", TOK: TOKEN };

function el(id) {
    return global.document.getElementById(id);
}

// Press Review on the Send screen with `amount` entered, for a send of `token`
// ("ETH" or TOKEN), and return what it handed the confirmation screen, or null
// when it handed nothing over.
async function review(amount, token) {
    let handed = null;
    send.init({ showConfirmTx: (info) => (handed = info) });
    state.selectedToken = token;
    el("send-to").value = RECIPIENT;
    el("send-amount").value = amount;
    await el("btn-send-review").handlers.get("click")();
    return handed;
}

// Show the confirmation screen for the send Review hands over for 0.5, with
// `amount` in its place, and let its fee estimate settle.
async function confirm(amount, token) {
    const txInfo = await review("0.5", token);
    confirmTx.show({ ...txInfo, amount });
    for (let i = 0; i < 10; i++) await new Promise((r) => setTimeout(r, 0));
}

beforeEach(() => {
    elements.clear();
    state.wallets = [
        {
            name: "Wallet 1",
            addresses: [
                {
                    address: HOLDER,
                    balance: "1.0",
                    tokenBalances: [
                        {
                            address: TOKEN,
                            name: "Token",
                            symbol: "TOK",
                            decimals: 6,
                            balance: "250.0",
                            holders: 50000,
                        },
                    ],
                },
            ],
        },
    ];
    state.selectedWallet = 0;
    state.selectedAddress = 0;
    state.trackedTokens = [
        { address: TOKEN, symbol: "TOK", name: "Token", decimals: 6 },
    ];
    state.fraudContracts = [];
    state.selectedToken = null;
    state.currentView = null;
});

describe.each([
    ["1e-3", "ETH"],
    ["1e-3", "TOK"],
    ["1abc", "ETH"],
    // 19 decimal places; ETH has 18.
    ["0.0000000000000000001", "ETH"],
    // 7 decimal places; the token has 6.
    ["0.0000001", "TOK"],
    ["0", "ETH"],
    ["-1", "ETH"],
])("%s %s", (amount, symbol) => {
    const token = TOKEN_BY_SYMBOL[symbol];

    test("Send refuses it with a flash message and opens nothing", async () => {
        expect(await review(amount, token)).toBe(null);
        expect(el("flash-msg").textContent).toBe(
            "Please enter a valid amount.",
        );
    });

    test("the confirmation screen refuses it too", async () => {
        await confirm(amount, token);
        expect(el("confirm-errors").innerHTML).toContain(
            "Please enter a valid amount to send.",
        );
        expect(el("btn-confirm-send").disabled).toBe(true);
    });
});

describe.each([
    ["0.5", "ETH"],
    ["0.5", "TOK"],
    // Exactly the 6 decimal places the token has.
    ["0.000001", "TOK"],
    // Only zeros past the token's 6 places, and past ETH's 18.
    ["1.0000000", "TOK"],
    ["0.5000000000000000000", "ETH"],
])("%s %s", (amount, symbol) => {
    const token = TOKEN_BY_SYMBOL[symbol];

    test("Send hands it to the confirmation screen", async () => {
        expect((await review(amount, token)).amount).toBe(amount);
        expect(el("flash-msg").textContent).toBe("");
    });

    test("the confirmation screen lets it be sent", async () => {
        await confirm(amount, token);
        expect(el("confirm-errors").innerHTML).toBe("");
        expect(el("btn-confirm-send").disabled).toBe(false);
    });
});