feat: Implement basic general folder support (#2051)

- Related: #1748

tests/ha/is-hass-different.test.ts

@@ -0,0 +1,32 @@
+import { afterEach, describe, expect, it, vi } from 'vitest';
+import { getHassDifferences } from '../../src/ha/get-hass-differences';
+import { isHassDifferent } from '../../src/ha/is-hass-different';
+import { createHASS, createStateEntity } from '../test-utils';
+
+vi.mock('../../src/ha/get-hass-differences');
+
+describe('isHassDifferent', () => {
+  afterEach(() => {
+    vi.clearAllMocks();
+  });
+
+  it('should return true with difference', async () => {
+    vi.mocked(getHassDifferences).mockReturnValue([
+      { entityID: 'light.office', newState: createStateEntity() },
+    ]);
+
+    const newHass = createHASS();
+    const oldHass = createHASS();
+    const entities = ['light.office'];
+
+    expect(isHassDifferent(newHass, oldHass, entities)).toBe(true);
+    expect(getHassDifferences).toBeCalledWith(newHass, oldHass, entities, {
+      firstOnly: true,
+    });
+  });
+
+  it('should return false without difference', async () => {
+    vi.mocked(getHassDifferences).mockReturnValue([]);
+    expect(isHassDifferent(createHASS(), createHASS(), ['light.office'])).toBe(false);
+  });
+});