chore: add test for #3311

Author: johnsoncodehk

test-workspace/tsc/vue3/#3311/component.vue

@@ -0,0 +1,10 @@
+<script lang="ts">
+type SwitchByBoolean<T extends boolean, V> = false extends T ? V : V[];
+</script>
+
+<script lang="ts" setup generic="T extends boolean, V extends SwitchByBoolean<T, string>">
+defineProps<{
+	modelValue?: V;
+	multiple?: T;
+}>();
+</script>

test-workspace/tsc/vue3/#3311/main.vue

@@ -0,0 +1,12 @@
+<template>
+	<HelloWorld :multiple="true" :modelValue="['a']" />
+	<HelloWorld :multiple="false" :modelValue="'a'" />
+	<!-- @vue-expect-error -->
+	<HelloWorld :multiple="false" :modelValue="['a']" />
+	<!-- @vue-expect-error -->
+	<HelloWorld :multiple="true" :modelValue="'a'" />
+</template>
+
+<script lang="ts" setup>
+import HelloWorld from './component.vue'
+</script>