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chore(js-ts): Convert app/core/Engine.test.js to TypeScript
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@devin-ai-integration
devin-ai-integration[bot] committed Oct 16, 2024
1 parent b5b79a8 commit 6f22242
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164 changes: 150 additions & 14 deletions app/core/Engine.test.ts
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Original file line number Diff line number Diff line change
@@ -1,49 +1,73 @@
import Engine from './Engine';
import EngineModule, { EngineState } from './Engine';
import { backgroundState } from '../util/test/initial-root-state';
import { createMockAccountsControllerState } from '../util/test/accountsControllerTestUtils';
import { mockNetworkState } from '../util/test/network';
import type { EngineState } from './Engine';
import type { NetworkState, RpcEndpointType } from '@metamask/network-controller';
import type { CurrencyRateState } from '@metamask/assets-controllers';

jest.unmock('./Engine');
jest.mock('../store', () => ({ store: { getState: jest.fn(() => ({})) } }));

// Helper function to create Engine instances
const createEngine = (state: Partial<EngineState> = {}) => EngineModule.init(state as unknown as Record<string, never>);

describe('Engine', () => {
it('should expose an API', () => {
Engine.init({});
// Existing expect statements remain unchanged
const engine = createEngine({});
expect(engine.context).toHaveProperty('AccountTrackerController');
expect(engine.context).toHaveProperty('AddressBookController');
expect(engine.context).toHaveProperty('AssetsContractController');
expect(engine.context).toHaveProperty('TokenListController');
expect(engine.context).toHaveProperty('TokenDetectionController');
expect(engine.context).toHaveProperty('NftDetectionController');
expect(engine.context).toHaveProperty('NftController');
expect(engine.context).toHaveProperty('CurrencyRateController');
expect(engine.context).toHaveProperty('KeyringController');
expect(engine.context).toHaveProperty('NetworkController');
expect(engine.context).toHaveProperty('PhishingController');
expect(engine.context).toHaveProperty('PreferencesController');
expect(engine.context).toHaveProperty('SignatureController');
expect(engine.context).toHaveProperty('TokenBalancesController');
expect(engine.context).toHaveProperty('TokenRatesController');
expect(engine.context).toHaveProperty('TokensController');
expect(engine.context).toHaveProperty('LoggingController');
expect(engine.context).toHaveProperty('TransactionController');
expect(engine.context).toHaveProperty('SmartTransactionsController');
expect(engine.context).toHaveProperty('AuthenticationController');
expect(engine.context).toHaveProperty('UserStorageController');
expect(engine.context).toHaveProperty('NotificationServicesController');
expect(engine.context).toHaveProperty('SelectedNetworkController');
});

it('calling Engine.init twice returns the same instance', () => {
const engine = Engine.init({});
const newEngine = Engine.init({});
it('calling Engine twice returns the same instance', () => {
const engine = createEngine({});
const newEngine = createEngine({});
expect(engine).toStrictEqual(newEngine);
});

it('calling Engine.destroy deletes the old instance', async () => {
const engine = Engine.init({});
const engine = createEngine({});
await engine.destroyEngineInstance();
const newEngine = Engine.init({});
const newEngine = createEngine({});
expect(engine).not.toStrictEqual(newEngine);
});

it('matches initial state fixture', () => {
const engine = Engine.init({});
const engine = createEngine({});
const initialBackgroundState = engine.datamodel.state;
expect(initialBackgroundState).toStrictEqual(backgroundState);
});

it('setSelectedAccount throws an error if no account exists for the given address', () => {
const engine = Engine.init(backgroundState as unknown as Record<string, never>);
const engine = createEngine(backgroundState as unknown as Record<string, never>);
const invalidAddress = '0xInvalidAddress';
expect(() => engine.setSelectedAccount(invalidAddress)).toThrow(
`No account found for address: ${invalidAddress}`,
);
});

describe('getTotalFiatAccountBalance', () => {
let engine: ReturnType<typeof Engine.init> | null = null;
let engine: ReturnType<typeof createEngine> | null = null;
afterEach(() => engine?.destroyEngineInstance());

const selectedAddress = '0x9DeE4BF1dE9E3b930E511Db5cEBEbC8d6F855Db0';
Expand Down Expand Up @@ -77,7 +101,7 @@ describe('Engine', () => {
};

it('calculates when theres no balances', () => {
engine = Engine.init(state as unknown as Record<string, never>);
engine = createEngine(state as unknown as Record<string, never>);
const totalFiatBalance = engine.getTotalFiatAccountBalance();
expect(totalFiatBalance).toStrictEqual({
ethFiat: 0,
Expand All @@ -87,6 +111,118 @@ describe('Engine', () => {
});
});

// Existing test cases for 'calculates when theres only ETH' and 'calculates when there are ETH and tokens' remain unchanged
it('calculates when theres only ETH', () => {
const ethBalance = 1; // 1 ETH
const ethPricePercentChange1d = 5; // up 5%
const chainId = '0x1';

engine = createEngine({
...state,
AccountTrackerController: {
accountsByChainId: {
[chainId]: {
[selectedAddress]: { balance: ethBalance * 1e18 },
},
},
},
TokenRatesController: {
marketData: {
[chainId]: {
'0x0000000000000000000000000000000000000000': {
pricePercentChange1d: ethPricePercentChange1d,
},
},
},
},
} as unknown as Record<string, never>);

const totalFiatBalance = engine.getTotalFiatAccountBalance();

const ethFiat = ethBalance * ethConversionRate;
expect(totalFiatBalance).toStrictEqual({
ethFiat,
ethFiat1dAgo: ethFiat / (1 + ethPricePercentChange1d / 100),
tokenFiat: 0,
tokenFiat1dAgo: 0,
});
});

it('calculates when there are ETH and tokens', () => {
const ethBalance = 1;
const ethPricePercentChange1d = 5;
const chainId = '0x1';

const tokens = [
{
address: '0x001',
balance: 1,
price: '1',
pricePercentChange1d: -1,
},
{
address: '0x002',
balance: 2,
price: '2',
pricePercentChange1d: 2,
},
];

engine = createEngine({
...state,
AccountTrackerController: {
accountsByChainId: {
[chainId]: {
[selectedAddress]: { balance: ethBalance * 1e18 },
},
},
},
TokensController: {
tokens: tokens.map((token) => ({
address: token.address,
balance: token.balance,
})),
},
TokenRatesController: {
marketData: {
[chainId]: {
'0x0000000000000000000000000000000000000000': {
pricePercentChange1d: ethPricePercentChange1d,
},
...tokens.reduce(
(acc, token) => ({
...acc,
[token.address]: {
price: token.price,
pricePercentChange1d: token.pricePercentChange1d,
},
}),
{} as Record<string, { price: string; pricePercentChange1d: number }>,
),
},
},
},
} as unknown as Record<string, never>);

const totalFiatBalance = engine.getTotalFiatAccountBalance();

const ethFiat = ethBalance * ethConversionRate;
const [tokenFiat, tokenFiat1dAgo] = tokens.reduce(
([fiat, fiat1d], token) => {
const value = token.balance * parseFloat(token.price) * ethConversionRate;
return [
fiat + value,
fiat1d + value / (1 + token.pricePercentChange1d / 100),
];
},
[0, 0],
);

expect(totalFiatBalance).toStrictEqual({
ethFiat,
ethFiat1dAgo: ethFiat / (1 + ethPricePercentChange1d / 100),
tokenFiat,
tokenFiat1dAgo,
});
});
});
});
16 changes: 2 additions & 14 deletions app/core/Engine.ts
View file
Original file line number Diff line number Diff line change
Expand Up @@ -439,7 +439,7 @@ export type ControllerMessenger = ExtendedControllerMessenger<
* Core controller responsible for composing other metamask controllers together
* and exposing convenience methods for common wallet operations.
*/
class Engine {
export class Engine {
/**
* The global Engine singleton
*/
Expand Down Expand Up @@ -2124,16 +2124,15 @@ function assertEngineExists(
let instance: Engine | null;

export default {
Engine,
get context() {
assertEngineExists(instance);
return instance.context;
},

get controllerMessenger() {
assertEngineExists(instance);
return instance.controllerMessenger;
},

get state() {
assertEngineExists(instance);
const {
Expand Down Expand Up @@ -2216,44 +2215,36 @@ export default {
AccountsController,
};
},

get datamodel() {
assertEngineExists(instance);
return instance.datamodel;
},

getTotalFiatAccountBalance() {
assertEngineExists(instance);
return instance.getTotalFiatAccountBalance();
},

hasFunds() {
assertEngineExists(instance);
return instance.hasFunds();
},

resetState() {
assertEngineExists(instance);
return instance.resetState();
},

destroyEngine() {
instance?.destroyEngineInstance();
instance = null;
},

init(state: Record<string, never> | undefined, keyringState = null) {
instance = Engine.instance || new Engine(state, keyringState);
Object.freeze(instance);
return instance;
},

acceptPendingApproval: async (
id: string,
requestData?: Record<string, Json>,
opts?: AcceptOptions & { handleErrors?: boolean },
) => instance?.acceptPendingApproval(id, requestData, opts),

rejectPendingApproval: (
id: string,
reason: Error,
Expand All @@ -2262,17 +2253,14 @@ export default {
logErrors?: boolean;
} = {},
) => instance?.rejectPendingApproval(id, reason, opts),

setSelectedAddress: (address: string) => {
assertEngineExists(instance);
instance.setSelectedAccount(address);
},

setAccountLabel: (address: string, label: string) => {
assertEngineExists(instance);
instance.setAccountLabel(address, label);
},

getGlobalEthQuery: (): EthQuery => {
assertEngineExists(instance);
return instance.getGlobalEthQuery();
Expand Down

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