stack_wallet/test/utilities/amount/amount_unit_test.dart

import 'package:decimal/decimal.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:stackwallet/utilities/amount/amount.dart';
import 'package:stackwallet/utilities/amount/amount_unit.dart';
import 'package:stackwallet/utilities/enums/coin_enum.dart';

void main() {
  test("displayAmount BTC", () {
    final Amount amount = Amount(
      rawValue: BigInt.from(1012345678),
      fractionDigits: 8,
    );

    expect(
      AmountUnit.normal.displayAmount(
        amount: amount,
        locale: "en_US",
        coin: Coin.bitcoin,
        maxDecimalPlaces: 8,
      ),
      "10.12345678 BTC",
    );

    expect(
      AmountUnit.milli.displayAmount(
        amount: amount,
        locale: "en_US",
        coin: Coin.bitcoin,
        maxDecimalPlaces: 8,
      ),
      "10123.45678 mBTC",
    );

    expect(
      AmountUnit.micro.displayAmount(
        amount: amount,
        locale: "en_US",
        coin: Coin.bitcoin,
        maxDecimalPlaces: 8,
      ),
      "10123456.78 µBTC",
    );

    expect(
      AmountUnit.nano.displayAmount(
        amount: amount,
        locale: "en_US",
        coin: Coin.bitcoin,
        maxDecimalPlaces: 8,
      ),
      "1012345678 sats",
    );
    final dec = Decimal.parse("10.123456789123456789");

    expect(dec.toString(), "10.123456789123456789");
  });

  test("displayAmount ETH", () {
    final Amount amount = Amount.fromDecimal(
      Decimal.parse("10.123456789123456789"),
      fractionDigits: Coin.ethereum.decimals,
    );

    expect(
      AmountUnit.normal.displayAmount(
        amount: amount,
        locale: "en_US",
        coin: Coin.ethereum,
        maxDecimalPlaces: 8,
      ),
      "~10.12345678 ETH",
    );

    expect(
      AmountUnit.normal.displayAmount(
        amount: amount,
        locale: "en_US",
        coin: Coin.ethereum,
        maxDecimalPlaces: 4,
      ),
      "~10.1234 ETH",
    );

    expect(
      AmountUnit.normal.displayAmount(
        amount: amount,
        locale: "en_US",
        coin: Coin.ethereum,
        maxDecimalPlaces: 18,
      ),
      "10.123456789123456789 ETH",
    );

    expect(
      AmountUnit.milli.displayAmount(
        amount: amount,
        locale: "en_US",
        coin: Coin.ethereum,
        maxDecimalPlaces: 9,
      ),
      "~10123.456789123 mETH",
    );

    expect(
      AmountUnit.micro.displayAmount(
        amount: amount,
        locale: "en_US",
        coin: Coin.ethereum,
        maxDecimalPlaces: 8,
      ),
      "~10123456.78912345 µETH",
    );

    expect(
      AmountUnit.nano.displayAmount(
        amount: amount,
        locale: "en_US",
        coin: Coin.ethereum,
        maxDecimalPlaces: 1,
      ),
      "~10123456789.1 gwei",
    );

    expect(
      AmountUnit.pico.displayAmount(
        amount: amount,
        locale: "en_US",
        coin: Coin.ethereum,
        maxDecimalPlaces: 18,
      ),
      "10123456789123.456789 mwei",
    );

    expect(
      AmountUnit.femto.displayAmount(
        amount: amount,
        locale: "en_US",
        coin: Coin.ethereum,
        maxDecimalPlaces: 4,
      ),
      "10123456789123456.789 kwei",
    );

    expect(
      AmountUnit.atto.displayAmount(
        amount: amount,
        locale: "en_US",
        coin: Coin.ethereum,
        maxDecimalPlaces: 1,
      ),
      "10123456789123456789 wei",
    );
  });
}