How to write jasmine test cases for plugin

[maruthi-menlo]

Issue:

---

I need to write test cases for this plugin in my project. Below is the way I tried in my project but I'm getting the error.

ts file:
save(){
if (this.platform.is('cordova')){
var prefs = window['plugins'].appPreferences;
prefs.store (null, this.onPrefStoreError, 'serverUrl', this._settings.serverUrl);
prefs.store (null, this.onPrefStoreError, 'useProxy', this._settings.useProxy);
}
localStorage['settings'] = JSON.stringify(this._settings);
console.log('saved settings');
}

Spec file:
it('call save', inject([SettingsService,Platform], (settingsService: SettingsService, platform: Platform) => {
settingsService.save();
});
});

FYI.. I mock the platform as true in my mock file. Here I'm getting the platform as cordova.
I'm getting below error when I excute the above test case.
TypeError: undefined is not an object (evaluating 'window['plugins'].appPreferences') in config/karma-shim.js (line 29367)

Can anyone please let me know how to mock this plugin.

My mock file:
export class MockPlatformWithCordova {
public ready(): any {
return new Promise((resolve: Function) => {
resolve();
});
}

public is(name: string){
	if (name === 'cordova')
		return true;
	return true;
}

}

Please specify your environment

Plugin version:

• released version: _____
• repository master

Toolchain:

• Cordova cli
• Phonegap cli
• Phonegap cloud
• Ionic
• Other: _____

Platforms affected:

• Android
• iOS/macOS
• LocalStorage fallback for browser and blackberry
• Windows and Windows Phone 8.1 and later
• Windows Phone 8 and earlier (deprecated)

What the scope of your problem:

• General functionality (store/fetch/remove/clearAll)
• Suites
• Cloud synchronization and events
• Preferences pane generation and display