first pass at deprecation spec updates

spec/api-deprecations-spec.js

@@ -1,7 +1,7 @@
 const assert = require('assert')
-const {deprecations, deprecate} = require('electron')
+const {deprecations, deprecate, ipcRenderer} = require('electron')
 
-describe('deprecations', () => {
+describe.only('deprecations', () => {
   beforeEach(() => {
     deprecations.setHandler(null)
     process.throwDeprecation = true
@@ -18,9 +18,50 @@ describe('deprecations', () => {
     assert.deepEqual(messages, ['this is deprecated'])
   })
 
+  it('returns a deprecation handler after one is set', () => {
+    const messages = []
+
+    deprecations.setHandler((message) => {
+      messages.push(message)
+    })
+
+    deprecate.log('this is deprecated')
+    assert(typeof deprecations.getHandler() === 'function')
+  })
+
+  it('returns a deprecation warning', () => {
+    const messages = []
+
+    deprecations.setHandler((message) => {
+      messages.push(message)
+    })
+
+    deprecate.warn('old', 'new')
+    assert.deepEqual(messages, [`'old' is deprecated. Use 'new' instead.`])
+  })
+
   it('throws an exception if no deprecation handler is specified', () => {
     assert.throws(() => {
       deprecate.log('this is deprecated')
     }, /this is deprecated/)
   })
+
+  // it('deprecates a property', () => {
+  //   deprecate.property(object, property, method)
+  // })
+  //
+  // it('deprecates an event', () => {
+  //   deprecate.event(emitter, oldName, newName, fn)
+  // })
+  //
+  // it('forwards a method to member', () => {
+  //   deprecate.member(object, method, member)
+  // })
+
+  it('renames a method', () => {
+    assert(typeof ipcRenderer.sendSync === 'function')
+    deprecate.rename(ipcRenderer, 'sendSync', 'sendChannelSync')
+    assert(typeof ipcRenderer.sendSync === 'undefined')
+    // assert(typeof ipcRenderer.sendChannelSync === 'function')
+  })
 })