openethereum/js/packages/api/transport/middleware.spec.js

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// Copyright 2015-2017 Parity Technologies (UK) Ltd.
// This file is part of Parity.
// Parity is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// Parity is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with Parity. If not, see <http://www.gnu.org/licenses/>.
import Middleware from './middleware';
import JsonRpcBase from './jsonRpcBase';
const MOCKED = 'mocked!';
class MockTransport extends JsonRpcBase {
_execute () {
return Promise.resolve(MOCKED);
}
}
class MockMiddleware extends Middleware {
constructor (transport) {
super(transport);
this.register('mock_rpc', ([num]) => num);
this.register('mock_null', () => null);
}
}
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describe('api/transport/Middleware', () => {
let transport;
beforeEach(() => {
transport = new MockTransport();
transport.addMiddleware(MockMiddleware);
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});
it('Routes requests to middleware', () => {
return transport.execute('mock_rpc', [100]).then((num) => {
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expect(num).to.be.equal(100);
});
});
it('Passes non-mocked requests through', () => {
return transport.execute('not_moced', [200]).then((result) => {
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expect(result).to.be.equal(MOCKED);
});
});
it('Passes mocked requests through, if middleware returns null', () => {
return transport.execute('mock_null', [300]).then((result) => {
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expect(result).to.be.equal(MOCKED);
});
});
});