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test: implement proper webusb transport mock for ledger connection fa… #219

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24 changes: 14 additions & 10 deletions tests/LedgerWalletProvider.test.js
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Original file line number Diff line number Diff line change
@@ -1,11 +1,19 @@
// tests/LedgerWalletProvider.test.js
const { LedgerWalletProvider } = require('../src/services/wallet/LedgerWalletProvider');

// Mock the webusb transport layer so we can control its behavior in the tests
jest.mock('@ledgerhq/hw-transport-webusb', () => ({
create: jest.fn(),
}));
const TransportWebUSB = require('@ledgerhq/hw-transport-webusb');

describe('LedgerWalletProvider', () => {
let provider;

beforeEach(() => {
provider = new LedgerWalletProvider();
// Clear mock history between tests to prevent data leakage
jest.clearAllMocks();
});

test('should have correct id and name', () => {
Expand All @@ -14,14 +22,10 @@ describe('LedgerWalletProvider', () => {
});

test('connect should throw error if device not found', async () => {
// Mock TransportWebUSB.create to throw
const mockTransport = {
create: jest.fn().mockRejectedValue(new Error('No device selected')),
};
// Assume we can mock it
// For now, just test structure
expect(provider.connect).toBeDefined();
});
// Actively mock the transport to throw the error your comment specified
TransportWebUSB.create.mockRejectedValue(new Error('No device selected'));

// Add more tests as needed
});
// Assert that the provider bubbles up the correct error when connect is called
await expect(provider.connect()).rejects.toThrow('No device selected');
});
});