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import { expect, assert } from 'chai';
import { TransportCb } from './Transport';
import { RPCClient } from './RPCClient';
import { RPCMethodError } from './Defines';
describe('RPCClient', () => {
describe('notify', () => {
it('Should send request without id when called', () => {
let downstreamcb: any;
// Setup RPCClient with dummy transport
let client = new RPCClient({
SendUpstream: (data: string) => {
// Parse json to avoid string comparison
expect(JSON.parse(data)).to.deep.equal({
jsonrpc: "2.0",
method: "test",
params: [1, 2, 3]
});
},
SetDownstreamCb: (cb: TransportCb) => downstreamcb = cb
});
// Send notification
client.notify("test", 1, 2, 3);
});
});
describe('call', () => {
it('Should return results when using call', async () => {
let downstreamcb: any;
// Setup RPCClient with dummy transport
let client = new RPCClient({
SendUpstream: (data: string) => {
// Imitate server response
downstreamcb(JSON.stringify({
jsonrpc: "2.0",
id: JSON.parse(data).id,
result: 10
}));
},
SetDownstreamCb: (cb: TransportCb) => downstreamcb = cb
});
// call rpc method
var res = await client.call("test", 1, 2);
expect(res).to.equal(10);
});
it('Should throw error when error response is received', async () => {
let downstreamcb: any;
// Setup RPCClient with dummy transport
let client = new RPCClient({
SendUpstream: (data: string) => {
// Imitate server response
downstreamcb(JSON.stringify({
jsonrpc: "2.0",
id: JSON.parse(data).id,
error: {
code: 123,
message: "Testing"
}
}));
},
SetDownstreamCb: (cb: TransportCb) => downstreamcb = cb
});
try {
await client.call("test");
} catch (e) {
expect(e.code).to.equal(123);
expect(e.message).to.equal("Testing");
}
});
it('Should throw timeout error when no response from server is received', async () => {
let downstreamcb: any;
// Setup RPCClient with dummy transport
let client = new RPCClient({
SendUpstream: /* istanbul ignore next */ (data: string) => {
// Do nothing
},
SetDownstreamCb: (cb: TransportCb) => downstreamcb = cb
});
// Reduce timeout to speed up tests
client.requestTimeout = 10;
try {
await client.call("test");
} catch (e) {
expect(e.message).to.equal("Request timed out");
}
});
});
describe(`on('error')`, () => {
it('Should emit error when non numeric response id is received', async () => {
let downstreamcb: any;
// Setup RPCClient with dummy transport
let client = new RPCClient({
SendUpstream: /* istanbul ignore next */ (data: string) => { },
SetDownstreamCb: (cb: TransportCb) => downstreamcb = cb
});
// Listen for errors
client.on('error', (e) => {
expect(e.message).to.equal("Response id is not a number");
})
// Send a forged server message
downstreamcb(JSON.stringify({
jsonrpc: "2.0",
id: "test",
result: true
}));
});
it('Should emit error when non existing response id is received', async () => {
let downstreamcb: any;
// Setup RPCClient with dummy transport
let client = new RPCClient({
SendUpstream: /* istanbul ignore next */ (data: string) => { },
SetDownstreamCb: (cb: TransportCb) => downstreamcb = cb
});
// Listen for errors
client.on('error', (e) => {
expect(e.message).to.equal("Request with id 10 not found");
})
// Send a forged server message
downstreamcb(JSON.stringify({
jsonrpc: "2.0",
id: 10,
result: true
}));
});
it('Should emit parse error when response is malformed', async () => {
let downstreamcb: any;
// Setup RPCClient with dummy transport
let client = new RPCClient({
SendUpstream: /* istanbul ignore next */ (data: string) => { },
SetDownstreamCb: (cb: TransportCb) => downstreamcb = cb
});
// Listen for errors
client.on('error', (e) => {
expect(e.message).to.equal("Message parse failed: Invalid Message: wrong json rpc version");
})
// Send a forged server message
downstreamcb(JSON.stringify({
jsonrpc: "2.999",
id: 10,
result: true
}));
});
it('Should emit error when response type is not RPCResponse', async () => {
let downstreamcb: any;
// Setup RPCClient with dummy transport
let client = new RPCClient({
SendUpstream: /* istanbul ignore next */ (data: string) => { },
SetDownstreamCb: (cb: TransportCb) => downstreamcb = cb
});
// Listen for errors
client.on('error', (e) => {
expect(e.message).to.equal("Received message of non RPCResponse type");
})
// Send a forged server message
downstreamcb(JSON.stringify({
jsonrpc: "2.0",
method: "test"
}));
});
});
});
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