fix(input-number): fix increase/decrease button not work (#1259)

* fix(input-number): fix increase/decrease button not work

- fix increase/decrease not work when modelValue not in [min, max]

* test(input-number): add a test case which check increase/decrease button

packages/input-number/__tests__/input-number.spec.ts

@@ -242,4 +242,59 @@ describe('InputNumber.vue', () => {
     await nextTick()
     expect(wrapper.vm.num).toBe(1)
   })
+
+  test('check increase and decrease button when modelValue not in [min, max]', async () => {
+    const wrapper = _mount({
+      template: `
+      <el-input-number
+        ref="inputNumber1"
+        v-model="num1"
+        :min="1"
+        :max="10"
+      />
+      <el-input-number
+        ref="inputNumber2"
+        v-model="num2"
+        :min="1"
+        :max="10"
+      />`,
+      setup() {
+        const num1 = ref(-5)
+        const num2 = ref(15)
+        const inputNumber1 = ref(null)
+        const inputNumber2 = ref(null)
+        return {
+          num1,
+          num2,
+          inputNumber1,
+          inputNumber2,
+        }
+      },
+    })
+    const elInputNumber1 = wrapper.vm.inputNumber1
+    const elInputNumber2 = wrapper.vm.inputNumber2
+    expect(wrapper.vm.num1).toBe(1)
+    expect(wrapper.vm.num2).toBe(10)
+
+    elInputNumber1.decrease()
+    await nextTick()
+    expect(wrapper.vm.num1).toBe(1)
+    elInputNumber1.increase()
+    await nextTick()
+    expect(wrapper.vm.num1).toBe(2)
+    elInputNumber1.increase()
+    await nextTick()
+    expect(wrapper.vm.num1).toBe(3)
+
+
+    elInputNumber2.increase()
+    await nextTick()
+    expect(wrapper.vm.num2).toBe(10)
+    elInputNumber2.decrease()
+    await nextTick()
+    expect(wrapper.vm.num2).toBe(9)
+    elInputNumber2.decrease()
+    await nextTick()
+    expect(wrapper.vm.num2).toBe(8)
+  })
 })

packages/input-number/src/index.vue

@@ -269,8 +269,14 @@ export default defineComponent({
             newVal = toPrecision(newVal, props.precision)
           }
         }
-        if (newVal !== undefined && newVal >= props.max) newVal = props.max
+        if (newVal !== undefined && newVal >= props.max) {
-        if (newVal !== undefined && newVal <= props.min) newVal = props.min
+          newVal = props.max
+          emit('update:modelValue', newVal)
+        }
+        if (newVal !== undefined && newVal <= props.min) {
+          newVal = props.min
+          emit('update:modelValue', newVal)
+        }
         data.currentValue = newVal
         data.userInput = null
       },
@@ -284,7 +290,7 @@ export default defineComponent({
       innerInput.setAttribute('aria-valuenow', data.currentValue)
       innerInput.setAttribute('aria-disabled', inputNumberDisabled.value)
       if (toRawType(props.modelValue) !== 'Number' && props.modelValue !== undefined) {
-        setCurrentValue(undefined)
+        emit('update:modelValue', undefined)
       }
     })
     onUpdated(() => {