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test for REPL .save and .load and documentation updates
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seebees authored and bnoordhuis committed Nov 13, 2011
1 parent 897208e commit 3222a04
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5 changes: 5 additions & 0 deletions doc/api/repl.markdown
Expand Up @@ -79,6 +79,7 @@ connect to a long-running node process without restarting it.
### REPL Features

Inside the REPL, Control+D will exit. Multi-line expressions can be input.
Tab completion is supported for both global and local variables.

The special variable `_` (underscore) contains the result of the last expression.

Expand Down Expand Up @@ -113,6 +114,10 @@ There are a few special REPL commands:
multi-line expression.
- `.exit` - Close the I/O stream, which will cause the REPL to exit.
- `.help` - Show this list of special commands.
- `.save` - Save the current REPL session to a file
>.save ./file/to/save.js
- `.load` - Load a file into the current REPL session.
>.load ./file/to/load.js
The following key combinations in the REPL have these special effects:

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101 changes: 101 additions & 0 deletions test/simple/test-repl-.save.load.js
@@ -0,0 +1,101 @@
// 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 assert = require('assert');
var util = require('util');
var join = require('path').join;
var fs = require('fs');
var common = require('../common');

var repl = require('repl');

// A stream to push an array into a REPL
function ArrayStream() {
this.run = function (data) {
var self = this;
data.forEach(function (line) {
self.emit('data', line);
});
}
}
util.inherits(ArrayStream, require('stream').Stream);
ArrayStream.prototype.readable = true;
ArrayStream.prototype.writable = true;
ArrayStream.prototype.resume = function () {};
ArrayStream.prototype.write = function () {};

var works = [ [ 'inner.one' ], 'inner.o' ];

var putIn = new ArrayStream();
var testMe = repl.start('', putIn);


var testFile = [
'var top = function () {',
'var inner = {one:1};'
];
var saveFileName = join(common.tmpDir, 'test.save.js');

// input some data
putIn.run(testFile);

// save it to a file
putIn.run(['.save ' + saveFileName]);

// the file should have what I wrote
assert.equal(
fs.readFileSync(saveFileName, 'utf8'),
testFile.join('\n') + '\n');

// make sure that the REPL data is "correct"
// so when I load it back I know I'm good
testMe.complete('inner.o', function (error, data) {
assert.deepEqual(data, works);
});

// clear the REPL
putIn.run(['.clear']);

// Load the file back in
putIn.run(['.load ' + saveFileName]);

// make sure that the REPL data is "correct"
testMe.complete('inner.o', function (error, data) {
assert.deepEqual(data, works);
});

// clear the REPL
putIn.run(['.clear']);

var loadFile = join(common.tmpDir, 'file.does.not.exist');

// shold not break
putIn.write = function(data) {
// make sure I get a failed to load message and not some crazy error
assert.equal(data,
'Failed to load:' + loadFile + '\n');
// eat me to avoid work
putIn.write = function() {};
};
putIn.run(['.load ' +loadFile]);


//TODO how do I do a failed .save test?

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