src/node/test/math_client_test.js

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 *
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 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 *     * Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
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 * copyright notice, this list of conditions and the following disclaimer
 * in the documentation and/or other materials provided with the
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 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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var assert = require('assert');
var port_picker = require('../port_picker');

var grpc = require('..');
var math = grpc.load(__dirname + '/../examples/math.proto').math;

/**
 * Client to use to make requests to a running server.
 */
var math_client;

/**
 * Server to test against
 */
var server = require('../examples/math_server.js');


describe('Math client', function() {
  before(function(done) {
    port_picker.nextAvailablePort(function(port) {
      server.bind(port).listen();
      math_client = new math.Math(port);
      done();
    });
  });
  after(function() {
    server.shutdown();
  });
  it('should handle a single request', function(done) {
    var arg = {dividend: 7, divisor: 4};
    var call = math_client.Div(arg, function handleDivResult(err, value) {
      assert.ifError(err);
      assert.equal(value.quotient, 1);
      assert.equal(value.remainder, 3);
    });
    call.on('status', function checkStatus(status) {
      assert.strictEqual(status.code, grpc.status.OK);
      done();
    });
  });
  it('should handle a server streaming request', function(done) {
    var call = math_client.Fib({limit: 7});
    var expected_results = [1, 1, 2, 3, 5, 8, 13];
    var next_expected = 0;
    call.on('data', function checkResponse(value) {
      assert.equal(value.num, expected_results[next_expected]);
      next_expected += 1;
    });
    call.on('status', function checkStatus(status) {
      assert.strictEqual(status.code, grpc.status.OK);
      done();
    });
  });
  it('should handle a client streaming request', function(done) {
    var call = math_client.Sum(function handleSumResult(err, value) {
      assert.ifError(err);
      assert.equal(value.num, 21);
    });
    for (var i = 0; i < 7; i++) {
      call.write({'num': i});
    }
    call.end();
    call.on('status', function checkStatus(status) {
      assert.strictEqual(status.code, grpc.status.OK);
      done();
    });
  });
  it('should handle a bidirectional streaming request', function(done) {
    function checkResponse(index, value) {
      assert.equal(value.quotient, index);
      assert.equal(value.remainder, 1);
    }
    var call = math_client.DivMany();
    var response_index = 0;
    call.on('data', function(value) {
      checkResponse(response_index, value);
      response_index += 1;
    });
    for (var i = 0; i < 7; i++) {
      call.write({dividend: 2 * i + 1, divisor: 2});
    }
    call.end();
    call.on('status', function checkStatus(status) {
      assert.strictEqual(status.code, grpc.status.OK);
      done();
    });
  });
});