Added an unit test for #3.

tests/mime-wrapper-multiple.js

@@ -0,0 +1,35 @@
+var mime = require('../');
+var assert = require('assert');
+
+var callback = false;
+
+var files = [
+	'data/foo.txt.bz2',
+	'data/foo.txt.gz',
+	'data/foo.txt.zip',
+	'data/foo.txt.tar',
+	'data/foo.pdf',
+	'data/foo.txt'
+];
+
+var expected = [
+	'application/x-bzip2',
+	'application/x-gzip',
+	'application/zip',
+	'application/x-tar',
+	'application/pdf',
+	'text/plain'
+];
+
+mime.fileWrapper(files, function (err, res) {
+	callback = true;
+	assert.ifError(err);
+	console.log(res);
+	for (var i in res) {
+		assert.deepEqual(res[i], expected[i]);
+	}
+});
+
+process.on('exit', function () {
+	assert.ok(callback);
+});