added tests, "disable" tests are skipped for now

test.js

@@ -0,0 +1,62 @@
+var test = require('tape')
+var nanotiming = require('./')
+
+test('nanotiming(name) returns endTiming function', function (t) {
+  var endTiming = nanotiming('foo')
+  var timings = window.performance.getEntries()
+  var timing = timings[timings.length - 1]
+  window.performance.clearMeasures(timing.name)
+  if (typeof endTiming === 'function') {
+    t.pass('is a function')
+    endTiming()
+  } else {
+    t.fail('should be a function, but is ' + typeof endTiming)
+  }
+  t.end()
+})
+
+test('endTiming.uuid is a string', function (t) {
+  var endTiming = nanotiming('foo')
+  var timings = window.performance.getEntries()
+  var timing = timings[timings.length - 1]
+  window.performance.clearMeasures(timing.name)
+  endTiming()
+  t.equal(typeof endTiming.uuid, 'string')
+  t.end()
+})
+
+test('endTiming callback receives the timing name', function (t) {
+  t.plan(1)
+  var endTiming = nanotiming('foo')
+  var timings = window.performance.getEntries()
+  var timing = timings[timings.length - 1]
+  window.performance.clearMeasures(timing.name)
+  endTiming(name => t.equal(name, 'foo', 'name: ' + name))
+})
+
+test.skip('is disabled when no window.performance.mark in environment', function (t) {
+  t.plan(1)
+
+  var mark = window.performance.mark
+  window.performance.mark = undefined
+  // TODO: need a way to run the "disabled" check again
+
+  var noop = nanotiming('foo')
+  noop(() => t.fail('called the callback, but should have been a noop'))
+  setTimeout(t.pass)
+
+  window.performance.mark = mark
+})
+
+test.skip('is disabled when window.localStorage.DISABLE_NANOTIMING === "true"', function (t) {
+  t.plan(1)
+
+  window.localStorage.DISABLE_NANOTIMING = true
+  // TODO: need a way to run the "disabled" check again
+
+  var noop = nanotiming('foo')
+  noop(() => t.fail('called the callback, but should have been a noop'))
+  setTimeout(t.pass)
+
+  window.localStorage.removeItem('DISABLE_NANOTIMING')
+})