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repl: emit 'reset' event when context is reset

Closes #1183.
v0.11.0-release
Sami Samhuri 12 years ago
committed by Nathan Rajlich
parent
commit
5eacdd4bf9
  1. 21
      doc/api/repl.markdown
  2. 3
      lib/repl.js
  3. 73
      test/simple/test-repl-reset-event.js

21
doc/api/repl.markdown

@ -135,6 +135,27 @@ Example of listening for `exit`:
});
### Event: 'reset'
`function (context) {}`
Emitted when the REPL's context is reset. This happens when you type `.clear`.
If you start the repl with `{ useGlobal: true }` then this event will never
be emitted.
Example of listening for `reset`:
// Extend the initial repl context.
r = repl.start({ options ... });
someExtension.extend(r.context);
// When a new context is created extend it as well.
r.on('reset', function (context) {
console.log('repl has a new context');
someExtension.extend(context);
});
## REPL Features
<!-- type=misc -->

3
lib/repl.js

@ -356,6 +356,9 @@ REPLServer.prototype.createContext = function() {
REPLServer.prototype.resetContext = function() {
this.context = this.createContext();
// Allow REPL extensions to extend the new context
this.emit('reset', this.context);
};
REPLServer.prototype.displayPrompt = function(preserveCursor) {

73
test/simple/test-repl-reset-event.js

@ -0,0 +1,73 @@
// Copyright Joyent, Inc. and other Node contributors.
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to permit
// persons to whom the Software is furnished to do so, subject to the
// following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
// USE OR OTHER DEALINGS IN THE SOFTWARE.
var common = require('../common');
common.globalCheck = false;
var assert = require('assert');
var repl = require('repl');
var Stream = require('stream');
// create a dummy stream that does nothing
var dummy = new Stream();
dummy.write = dummy.pause = dummy.resume = function(){};
dummy.readable = dummy.writable = true;
function testReset(cb) {
var r = repl.start({
input: dummy,
output: dummy,
useGlobal: false
});
r.context.foo = 42;
r.on('reset', function(context) {
assert(!!context, 'REPL did not emit a context with reset event');
assert.equal(context, r.context, 'REPL emitted incorrect context');
assert.equal(context.foo, undefined, 'REPL emitted the previous context, and is not using global as context');
context.foo = 42;
cb();
});
r.resetContext();
}
function testResetGlobal(cb) {
var r = repl.start({
input: dummy,
output: dummy,
useGlobal: true
});
r.context.foo = 42;
r.on('reset', function(context) {
assert.equal(context.foo, 42, '"foo" property is missing from REPL using global as context');
cb();
});
r.resetContext();
}
var timeout = setTimeout(function() {
assert.fail('Timeout, REPL did not emit reset events');
}, 5000);
testReset(function() {
testResetGlobal(function() {
clearTimeout(timeout);
});
});
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