util: add sprintf-like format() function

Fixes #1407.

1 files changed, 46 insertions, 0 deletions

diff --git a/test/simple/test-util-format.js b/test/simple/test-util-format.js
new file mode 100644
index 00000000000..2525680b64f
--- /dev/null
+++ b/test/simple/test-util-format.js
@@ -0,0 +1,46 @@
+// 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');
+var assert = require('assert');
+var util = require('util');
+
+assert.equal(util.format(), '');
+assert.equal(util.format(''), '');
+assert.equal(util.format([]), '[]');
+assert.equal(util.format({}), '{}');
+assert.equal(util.format(null), 'null');
+assert.equal(util.format(true), 'true');
+assert.equal(util.format(false), 'false');
+assert.equal(util.format('test'), 'test');
+
+// CHECKME this is for console.log() compatibility - but is it *right*?
+assert.equal(util.format('foo', 'bar', 'baz'), 'foo bar baz');
+
+assert.equal(util.format('%d', 42.0), '42');
+assert.equal(util.format('%d', 42), '42');
+assert.equal(util.format('%s', 42), '42');
+assert.equal(util.format('%j', 42), '42');
+
+assert.equal(util.format('%d', '42.0'), '42');
+assert.equal(util.format('%d', '42'), '42');
+assert.equal(util.format('%s', '42'), '42');
+assert.equal(util.format('%j', '42'), '"42"');
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