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const http = require('http');
const LC = require('../src/client');
describe('λ-calculator', () => {
let challenger, port;
beforeEach((done) => {
challenger = http.createServer();
challenger.listen(0, () => {
port = challenger.address().port;
done();
});
});
afterEach((done) => {
challenger.close(() => done());
});
it('registers to challenger', () => {
challenger.on('request', (request, response) => {
expect(request.method).toBe('POST');
expect(request.url).toBe('/api/register');
expect(request.headers).toHaveProperty('content-type', 'application/json;charset=utf-8');
let payload = '';
request.on('data', (d) => (payload += d));
request.on('end', () => {
expect(payload).toEqual('"John Smith"');
});
response.end('SomeToken');
});
const client = LC.newClient({
playerName: 'John Smith',
challengerURL: `http://localhost:${port}`,
});
return client.start()
.then((token) => expect(token).toBe('SomeToken'));
});
it('retrieves next challenge', () => {
challenger.on('request', (request, response) => {
expect(request.method).toBe('GET');
expect(request.url).toBe('/api/challenge?token=SomeToken');
response.end(JSON.stringify({ expr: 'SomeChallenge' }));
});
const client = LC.newClient({
playerName: 'John Smith',
challengerURL: `http://localhost:${port}`,
});
return client.nextChallenge('SomeToken')
.then((challenge) => expect(challenge).toBe('SomeChallenge'));
});
it('solves challenges', () => {
const parser = {
parse: (challenge) => {
expect(challenge).toBe('Some challenge');
return 'Parsed expression';
},
};
const interpreter = {
evaluate: (parsedExpression) => {
expect(parsedExpression).toBe('Parsed expression');
return 'Evaluated expression';
},
};
const printer = {
print: (evaluatedExpression) => {
expect(evaluatedExpression).toBe('Evaluated expression');
return 'Expression to print';
},
};
const client = LC.newClient({ parser, interpreter, printer });
expect(client.solve('Some challenge')).toBe('Expression to print');
});
});
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