test: improve functional slots test case

Author: yyx990803

packages/dts-test/functionalComponent.test-d.tsx

@@ -69,13 +69,28 @@ const Qux: FunctionalComponent<{}, ['foo', 'bar']> = (props, { emit }) => {
 
 expectType<Component>(Qux)
 
-const Quux: FunctionalComponent<{}, {}, { default: { foo: number } }> = (
-  props,
-  { emit, slots }
-) => {
-  expectType<{ default: undefined | ((scope: { foo: number }) => VNode[]) }>(
-    slots
-  )
+const Quux: FunctionalComponent<
+  {},
+  {},
+  {
+    default: { foo: number }
+    optional?: { foo: number }
+  }
+> = (props, { emit, slots }) => {
+  expectType<{
+    default: (scope: { foo: number }) => VNode[]
+    optional?: (scope: { foo: number }) => VNode[]
+  }>(slots)
+
+  slots.default({ foo: 123 })
+  // @ts-expect-error
+  slots.default({ foo: 'fesf' })
+
+  slots.optional?.({ foo: 123 })
+  // @ts-expect-error
+  slots.optional?.({ foo: 'fesf' })
+  // @ts-expect-error
+  slots.optional({ foo: 123 })
 }
 expectType<Component>(Quux)
 ;<Quux />

packages/runtime-core/src/componentRenderUtils.ts

@@ -102,7 +102,7 @@ export function renderComponentRoot(
                       markAttrsAccessed()
                       return attrs
                     },
-                    slots: slots,
+                    slots,
                     emit
                   }
                 : { attrs, slots, emit }