[#59] Add tests for the optional extensions parameter

test/extensions.js

@@ -0,0 +1,34 @@
+var assert = require('assert');
+var requireDir = require('..');
+
+// first test regularly:
+assert.deepEqual(requireDir('./simple'), {
+    a: 'a',
+    b: 'b',
+});
+
+// only js files
+assert.deepEqual(requireDir('./simple', {extensions: ['.js']}), {
+    a: 'a'
+});
+
+// both js and json files
+assert.deepEqual(requireDir('./simple', {extensions: ['.js', '.json']}), {
+    a: 'a',
+    b: 'b'
+});
+
+// then test with recursing:
+assert.deepEqual(requireDir('./recurse', {recurse: true, extensions: ['.js']}), {
+    a: 'a',
+    b: {
+        '1': {
+            foo: 'foo'
+        },
+        '2': {}     // note how the directory is always returned
+    },
+    c: {}
+    // note that node_modules was explicitly ignored
+});
+
+console.log('Extensions tests passed.');