Add spec for accessing process.stdin

spec/node-spec.js

@@ -221,12 +221,16 @@ describe('node feature', function () {
   })
 
   describe('process.stdout', function () {
-    it('should not throw exception', function () {
-      process.stdout
+    it('does not throw an exception when accessed', function () {
+      assert.doesNotThrow(function () {
+        process.stdout
+      })
     })
 
-    it('should not throw exception when calling write()', function () {
-      process.stdout.write('test')
+    it('does not throw an exception when calling write()', function () {
+      assert.doesNotThrow(function () {
+        process.stdout.write('test')
+      })
     })
 
     it('should have isTTY defined', function () {
@@ -236,6 +240,20 @@ describe('node feature', function () {
     })
   })
 
+  describe('process.stdin', function () {
+    it('does not throw an exception when accessed', function () {
+      assert.doesNotThrow(function () {
+        process.stdin
+      })
+    })
+
+    it('does not throw an exception when calling read()', function () {
+      assert.doesNotThrow(function () {
+        assert.equal(process.stdin.read(), null)
+      })
+    })
+  })
+
   describe('process.version', function () {
     it('should not have -pre', function () {
       assert(!process.version.endsWith('-pre'))