Update default extensions to match node

lib/async.js

@@ -42,7 +42,7 @@ module.exports = function resolve(x, options, callback) {
     var isDirectory = opts.isDirectory || defaultIsDir;
     var readFile = opts.readFile || fs.readFile;
 
-    var extensions = opts.extensions || ['.js'];
+    var extensions = opts.extensions || ['.js', '.json', '.node'];
     var basedir = opts.basedir || path.dirname(caller());
     var parent = opts.filename || basedir;
 

lib/sync.js

@@ -33,7 +33,7 @@ module.exports = function (x, options) {
     var isDirectory = opts.isDirectory || defaultIsDir;
     var readFileSync = opts.readFileSync || fs.readFileSync;
 
-    var extensions = opts.extensions || ['.js'];
+    var extensions = opts.extensions || ['.js', '.json', '.node'];
     var basedir = opts.basedir || path.dirname(caller());
     var parent = opts.filename || basedir;
 

readme.markdown

@@ -85,7 +85,7 @@ default `opts` values:
 {
     paths: [],
     basedir: __dirname,
-    extensions: ['.js'],
+    extensions: [ '.js', '.json', '.node' ],
     readFile: fs.readFile,
     isFile: function isFile(file, cb) {
         fs.stat(file, function (err, stat) {
@@ -151,7 +151,7 @@ default `opts` values:
 {
     paths: [],
     basedir: __dirname,
-    extensions: ['.js'],
+    extensions: [ '.js', '.json', '.node' ],
     readFileSync: fs.readFileSync,
     isFile: function isFile(file) {
         try {

test/resolver.js

@@ -46,6 +46,21 @@ test('async foo', function (t) {
     });
 });
 
+test('non-default extensions', function (t) {
+    t.plan(2);
+    var dir = path.join(__dirname, 'resolver');
+
+    resolve('./foo-json', { basedir: dir }, function (err, res, pkg) {
+        if (err) t.fail(err);
+        t.equal(res, path.join(dir, 'foo-json.json'));
+    });
+
+    resolve('./foo-node', { basedir: dir }, function (err, res, pkg) {
+        if (err) t.fail(err);
+        t.equal(res, path.join(dir, 'foo-node.node'));
+    });
+});
+
 test('bar', function (t) {
     t.plan(6);
     var dir = path.join(__dirname, 'resolver');

test/resolver/foo-json.json

@@ -0,0 +1 @@
+1

test/resolver/foo-node.node

@@ -0,0 +1 @@
+module.exports = 1;

test/resolver_sync.js

@@ -38,6 +38,22 @@ test('foo', function (t) {
     t.end();
 });
 
+test('non-default extensions', function (t) {
+    var dir = path.join(__dirname, 'resolver');
+
+    t.equal(
+        resolve.sync('./foo-json', { basedir: dir }),
+        path.join(dir, 'foo-json.json')
+    );
+
+    t.equal(
+        resolve.sync('./foo-node', { basedir: dir }),
+        path.join(dir, 'foo-node.node')
+    );
+
+    t.end();
+});
+
 test('bar', function (t) {
     var dir = path.join(__dirname, 'resolver');