chore: improve nativeImage path converter error (#21243)

spec-main/api-tray-spec.ts

@@ -1,6 +1,7 @@
 import { expect } from 'chai'
 import { Menu, Tray, nativeImage } from 'electron'
 import { ifdescribe, ifit } from './spec-helpers'
+import * as path from 'path'
 
 describe('tray module', () => {
   let tray: Tray
@@ -12,6 +13,15 @@ describe('tray module', () => {
     tray = null as any
   })
 
+  describe('new Tray', () => {
+    it('throws a descriptive error for a missing file', () => {
+      const badPath = path.resolve('I', 'Do', 'Not', 'Exist')
+      expect(() => {
+        tray = new Tray(badPath)
+      }).to.throw(/Image could not be created from .*/)
+    })
+  })
+
   ifdescribe(process.platform === 'darwin')('tray get/set ignoreDoubleClickEvents', () => {
     it('returns false by default', () => {
       const ignored = tray.getIgnoreDoubleClickEvents()