nodejs/test/simple/test-repl.js

common = require("../common");
assert = common.assert

var net = require("net"),
  repl = require("repl"),
  message = "Read, Eval, Print Loop",
  unix_socket_path = "/tmp/node-repl-sock",
  prompt_unix = "node via Unix socket> ",
  prompt_tcp = "node via TCP socket> ",
  prompt_multiline = "... ",
  server_tcp, server_unix, client_tcp, client_unix, timer;

// absolute path to test/fixtures/a.js
var moduleFilename = require("path").join(common.fixturesDir, "a");

common.error('repl test');

// function for REPL to run
invoke_me = function (arg) {
  return "invoked " + arg;
};

function send_expect(list) {
  if (list.length > 0) {
    var cur = list.shift();

    common.error("sending " + JSON.stringify(cur.send));

    cur.client.expect = cur.expect;
    cur.client.list = list;
    if (cur.send.length > 0) {
      cur.client.write(cur.send);
    }
  }
}

function clean_up() {
  client_tcp.end();
  client_unix.end();
  clearTimeout(timer);
}

function error_test() {
  // The other stuff is done so reuse unix socket
  var read_buffer = "";
  client_unix.removeAllListeners('data');

  client_unix.addListener('data', function (data) {
    read_buffer += data.toString('ascii', 0, data.length);
    common.error("Unix data: " + JSON.stringify(read_buffer) + ", expecting " +
      (client_unix.expect.exec ? client_unix.expect :
                                 JSON.stringify(client_unix.expect)));

    if (read_buffer.indexOf(prompt_unix) !== -1) {
      assert.ok(read_buffer.match(client_unix.expect));
      common.error("match");
      read_buffer = "";
      if (client_unix.list && client_unix.list.length > 0) {
        send_expect(client_unix.list);
      } else {
        common.error("End of Error test, running TCP test.");
        tcp_test();
      }

    } else if (read_buffer === prompt_multiline) {
      // Check that you meant to send a multiline test
      assert.strictEqual(prompt_multiline, client_unix.expect);
      read_buffer = "";
      if (client_unix.list && client_unix.list.length > 0) {
        send_expect(client_unix.list);
      } else {
        common.error("End of Error test, running TCP test.\n");
        tcp_test();
      }

    } else {
      common.error("didn't see prompt yet, buffering.");
    }
  });

  send_expect([
    // Uncaught error throws and prints out
    { client: client_unix, send: "throw new Error('test error');", expect: /^Error: test error/ },
    // Common syntax error is treated as multiline command
    { client: client_unix, send: "function test_func() {", expect: prompt_multiline },
    // You can recover with the .break command
    { client: client_unix, send: ".break", expect: prompt_unix },
    // Can parse valid JSON
    { client: client_unix, send: "JSON.parse('{\"valid\": \"json\"}');", expect: "{ valid: 'json' }"},
    // invalid input to JSON.parse error is special case of syntax error, should throw
    { client: client_unix, send: "JSON.parse('{invalid: \\'json\\'}');",
                           expect: /^SyntaxError: Unexpected token ILLEGAL/ }
  ]);
}

function tcp_test() {
  server_tcp = net.createServer(function (socket) {
    assert.strictEqual(server_tcp, socket.server);
    assert.strictEqual(server_tcp.type, 'tcp4');

    socket.addListener("end", function () {
      socket.end();
    });

    repl.start(prompt_tcp, socket);
  });

  server_tcp.listen(common.PORT, function () {
    var read_buffer = "";

    client_tcp = net.createConnection(common.PORT);

    client_tcp.addListener('connect', function () {
      assert.equal(true, client_tcp.readable);
      assert.equal(true, client_tcp.writable);

      send_expect([
          { client: client_tcp, send: "", expect: prompt_tcp },
          { client: client_tcp, send: "invoke_me(333)\n", expect: ('\'' + "invoked 333" + '\'\n' + prompt_tcp) },
          { client: client_tcp, send: "a += 1\n", expect: ("12346" + '\n' + prompt_tcp) },
          { client: client_tcp,
            send: "require('" + moduleFilename + "').number\n",
            expect: ("42" + '\n' + prompt_tcp) }
        ]);
    });

    client_tcp.addListener('data', function (data) {
      read_buffer += data.toString('ascii', 0, data.length);
      common.error("TCP data: " + JSON.stringify(read_buffer) + ", expecting " + JSON.stringify(client_tcp.expect));
      if (read_buffer.indexOf(prompt_tcp) !== -1) {
        assert.strictEqual(client_tcp.expect, read_buffer);
        common.error("match");
        read_buffer = "";
        if (client_tcp.list && client_tcp.list.length > 0) {
          send_expect(client_tcp.list);
        } else {
          common.error("End of TCP test.\n");
          clean_up();
        }
      } else {
        common.error("didn't see prompt yet, buffering");
      }
    });

    client_tcp.addListener("error", function (e) {
      throw e;
    });

    client_tcp.addListener("close", function () {
      server_tcp.close();
    });
  });

}

function unix_test() {
  server_unix = net.createServer(function (socket) {
    assert.strictEqual(server_unix, socket.server);
    assert.strictEqual(server_unix.type, 'unix');

    socket.addListener("end", function () {
      socket.end();
    });

    repl.start(prompt_unix, socket).context.message = message;
  });

  server_unix.addListener('listening', function () {
    var read_buffer = "";

    client_unix = net.createConnection(unix_socket_path);

    client_unix.addListener('connect', function () {
      assert.equal(true, client_unix.readable);
      assert.equal(true, client_unix.writable);

      send_expect([
          { client: client_unix, send: "", expect: prompt_unix },
          { client: client_unix, send: "message\n", expect: ('\'' + message + '\'\n' + prompt_unix) },
          { client: client_unix, send: "invoke_me(987)\n", expect: ('\'' + "invoked 987" + '\'\n' + prompt_unix) },
          { client: client_unix, send: "a = 12345\n", expect: ("12345" + '\n' + prompt_unix) }
        ]);
    });

    client_unix.addListener('data', function (data) {
      read_buffer += data.toString('ascii', 0, data.length);
      common.error("Unix data: " + JSON.stringify(read_buffer) + ", expecting " + JSON.stringify(client_unix.expect));
      if (read_buffer.indexOf(prompt_unix) !== -1) {
        assert.strictEqual(client_unix.expect, read_buffer);
        common.error("match");
        read_buffer = "";
        if (client_unix.list && client_unix.list.length > 0) {
          send_expect(client_unix.list);
        } else {
          common.error("End of Unix test, running Error test.\n");
          process.nextTick(error_test);
        }
      } else {
        common.error("didn't see prompt yet, buffering.");
      }
    });

    client_unix.addListener("error", function (e) {
      throw e;
    });

    client_unix.addListener("close", function () {
      server_unix.close();
    });
  });

  server_unix.listen(unix_socket_path);
}

unix_test();

timer = setTimeout(function () {
  assert.fail("Timeout");
}, 1000);