tes(js): add test for reactive wrapper

Author: francoischalifour

packages/autocomplete-js/src/__tests__/createReactiveWrapper.test.ts

@@ -0,0 +1,29 @@
+import { createReactiveWrapper } from '../createReactiveWrapper';
+
+describe('createReactiveWrapper', () => {
+  test('runs the reactive values', () => {
+    const { reactive, runReactives } = createReactiveWrapper();
+    let lastValue = -1;
+    const computeValue = jest.fn(() => {
+      lastValue++;
+      return lastValue;
+    });
+    const computeValue2 = jest.fn(() => 0);
+
+    const callResult = reactive(computeValue);
+    expect(computeValue).toHaveBeenCalledTimes(1);
+    expect(callResult.value).toEqual(0);
+
+    const callResult2 = reactive(computeValue2);
+    expect(computeValue2).toHaveBeenCalledTimes(1);
+    expect(callResult2.value).toEqual(0);
+
+    runReactives();
+
+    expect(computeValue).toHaveBeenCalledTimes(2);
+    expect(callResult.value).toEqual(1);
+
+    expect(computeValue2).toHaveBeenCalledTimes(2);
+    expect(callResult2.value).toEqual(0);
+  });
+});