Chore: Refactor mobile plugin logic into locations more consistent with other parts of the app (#10636)

packages/lib/services/plugins/testing/MockPlatformImplementation.ts

@@ -0,0 +1,37 @@
+import BasePlatformImplementation from '../BasePlatformImplementation';
+import shim from '../../../shim';
+import Setting from '../../../models/Setting';
+import { reg } from '../../../registry';
+import { Implementation as ImagingImplementation } from '../api/JoplinImaging';
+
+export default class MockPlatformImplementation extends BasePlatformImplementation {
+	public override get versionInfo() {
+		return {
+			version: shim.appVersion(),
+			syncVersion: Setting.value('syncVersion'),
+			platform: 'desktop' as 'desktop',
+			profileVersion: reg.db().version(),
+		};
+	}
+
+	public override get nativeImage(): null {
+		return null;
+	}
+
+	public override get imaging(): ImagingImplementation {
+		return null;
+	}
+
+	public override get window(): null {
+		return null;
+	}
+
+	public override get joplin() {
+		return { views: { dialogs: { showMessageBox: jest.fn(), showOpenDialog: jest.fn() } } };
+	}
+
+	public override get clipboard(): null {
+		return null;
+	}
+}
+