improve test coverage

vueuse · Apr 14, 2023 · fe1ec45 · fe1ec45
1 parent 3889b46
commit fe1ec45
Showing 1 changed file with 20 additions and 0 deletions.
diff --git a/packages/core/useTransition/index.test.ts b/packages/core/useTransition/index.test.ts
@@ -158,6 +158,26 @@ describe('useTransition', () => {
     expect(transition.value).toBe(1)
   })
 
+  it('supports non-linear custom easing functions', async () => {
+    const source = ref(0)
+    const easeInQuad = vi.fn(n => n * n)
+    const transition = useTransition(source, {
+      duration: 100,
+      transition: easeInQuad,
+    })
+
+    expect(easeInQuad).not.toBeCalled()
+
+    source.value = 1
+
+    await promiseTimeout(50)
+    expect(easeInQuad).toBeCalled()
+    expectBetween(transition.value, 0, 1)
+
+    await promiseTimeout(100)
+    expect(transition.value).toBe(1)
+  })
+
   it('supports delayed transitions', async () => {
     const source = ref(0)