nativeTheme is undefined

[jarrodek]

Electron 7 introduced new API called nativeTheme, however app.electron.nativeTheme is undefined. It should have properties like themeSource, shouldUseDarkColors, and others.
When I am printing to the console app.electron it looks good but it does not have nativeTheme property.

Electron version: 7.0.0
Spectron version: 9.0.0

[dennisameling]

Having the same issue here with Electron 7.1.8 on Windows 10 x64. The weird thing is that when I run the Electron app locally, it works, but when running tests (Spectron 9.0.0), it doesn't and nativeTheme is undefined:

FAIL app/test/unit/stats-store-test.ts
  ● Test suite failed to run

    TypeError: Cannot read property 'addListener' of undefined

      20 |     }
      21 | 
    > 22 |     remote.nativeTheme.addListener('updated', this.onThemeNotificationFromOS)
         |                        ^
      23 |   }
      24 | 
      25 |   private onThemeNotificationFromOS = (event: string, userInfo: any) => {

      at ThemeChangeMonitor.subscribe (src/ui/lib/theme-change-monitor.ts:22:24)
      at new ThemeChangeMonitor (src/ui/lib/theme-change-monitor.ts:10:10)
      at Object.<anonymous> (src/ui/lib/theme-change-monitor.ts:44:35)
      at Object.<anonymous> (src/lib/stores/app-store.ts:65:1)
      at Object.<anonymous> (src/lib/stores/index.ts:2:1)
      at Object.<anonymous> (src/lib/stats/stats-store.ts:13:1)
      at Object.<anonymous> (src/lib/stats/index.ts:2:1)
      at Object.<anonymous> (test/helpers/databases/test-stats-database.ts:1:1)
      at Object.<anonymous> (test/helpers/databases/index.ts:4:1)
      at Object.<anonymous> (test/unit/stats-store-test.ts:1:1)

@jarrodek were you able to resolve your issue in the meantime?

[dennisameling]

Update: nativeTheme only seems to be undefined in test environments, not when running an Electron app manually on Windows 10 1809+/Server 2019+. Not sure if this is related to Spectron or Electon itself though. See desktop/desktop#9699

[dennisameling]

Just to provide a quick update here: GitHub Desktop uses a mock service for Electron remote, there the nativeTheme property was missing. So that issue is solved. See https://github.com/desktop/desktop/pull/9709/files