refactor: change separate tools by category

web/vue/src/composables/useCached/index.test.ts

@@ -0,0 +1,51 @@
+import { describe, expect, it } from 'vitest';
+import { ref, nextTick, reactive } from 'vue';
+import { useCached } from '.';
+
+const arrayEquals = (a: number[], b: number[]) => a.length === b.length && a.every((v, i) => v === b[i]);
+
+describe('useCached', () => {
+  it('default comparator', async () => {
+    const externalValue = ref(0);
+    const cachedValue = useCached(externalValue);
+
+    expect(cachedValue.value).toBe(0);
+
+    externalValue.value = 1;
+    await nextTick();
+    expect(cachedValue.value).toBe(1);
+  });
+
+  it('custom array comparator', async () => {
+    const externalValue = ref([1]);
+    const initialValue = externalValue.value;
+
+    const cachedValue = useCached(externalValue, arrayEquals);
+
+    expect(cachedValue.value).toEqual(initialValue);
+
+    externalValue.value = initialValue;
+    await nextTick();
+    expect(cachedValue.value).toEqual(initialValue);
+
+    externalValue.value = [1];
+    await nextTick();
+    expect(cachedValue.value).toEqual(initialValue);
+
+    externalValue.value = [2];
+    await nextTick();
+    expect(cachedValue.value).not.toEqual(initialValue);
+    expect(cachedValue.value).toEqual([2]);
+  });
+
+  it('getter source', async () => {
+    const externalValue = reactive({ value: 0 });
+    const cachedValue = useCached(() => externalValue.value);
+
+    expect(cachedValue.value).toBe(0);
+
+    externalValue.value = 1;
+    await nextTick();
+    expect(cachedValue.value).toBe(1);
+  });
+});