🚨 Add tests for replenishment workbook (#1726)

Author: KATO-Hiro

src/test/lib/stores/replenishment_workbook.test.ts

@@ -0,0 +1,40 @@
+import { expect, test } from 'vitest';
+
+import { replenishmentWorkBooksStore } from '$lib/stores/replenishment_workbook.svelte';
+
+describe('Replenishment workbooks store', () => {
+  beforeEach(() => {
+    replenishmentWorkBooksStore.reset();
+  });
+
+  test('expects to be invisible before toggling', () => {
+    expect(replenishmentWorkBooksStore.canView()).toBeFalsy();
+  });
+
+  test('expects to be visible after toggling once', () => {
+    replenishmentWorkBooksStore.toggleView();
+    expect(replenishmentWorkBooksStore.canView()).toBeTruthy();
+  });
+
+  test('expects to be invisible after toggling twice', () => {
+    replenishmentWorkBooksStore.toggleView();
+    replenishmentWorkBooksStore.toggleView();
+    expect(replenishmentWorkBooksStore.canView()).toBeFalsy();
+  });
+
+  test('expects to be visible after toggling three times', () => {
+    for (let i = 1; i <= 3; i++) {
+      replenishmentWorkBooksStore.toggleView();
+    }
+
+    expect(replenishmentWorkBooksStore.canView()).toBeTruthy();
+  });
+
+  test('expects to be invisible after toggling four times', () => {
+    for (let i = 1; i <= 4; i++) {
+      replenishmentWorkBooksStore.toggleView();
+    }
+
+    expect(replenishmentWorkBooksStore.canView()).toBeFalsy();
+  });
+});