Adding CPU and I/O metrics to process module

spec/api-process-spec.js

@@ -0,0 +1,23 @@
+const assert = require('assert')
+
+describe('process module', function () {
+  describe('process.getCPUUsage()', function () {
+    it('returns a cpu usage object', function () {
+      var cpuUsage = process.getCPUUsage()
+      assert.equal(typeof cpuUsage.percentCPUUsage, 'number')
+      assert.equal(typeof cpuUsage.idleWakeupsPerSecond, 'number')
+    })
+  })
+
+  describe('process.getIOCounters()', function () {
+    it('returns an io counters object', function () {
+      var ioCounters = process.getIOCounters()
+      assert.ok(ioCounters.readOperationCount > 0, 'read operation count not > 0')
+      assert.ok(ioCounters.writeOperationCount > 0, 'write operation count not > 0')
+      assert.ok(ioCounters.otherOperationCount > 0, 'other operation count not > 0')
+      assert.ok(ioCounters.readTransferCount > 0, 'read transfer count not > 0')
+      assert.ok(ioCounters.writeTransferCount > 0, 'write transfer count not > 0')
+      assert.ok(ioCounters.otherTransferCount > 0, 'other transfer count not > 0')
+    })
+  })
+})