fix(types): error booleans shouldn't permanently be typed as false (#7956)

* fix(types): error booleans shouldn't permanently be typed as `false`

* fix(types): error booleans shouldn't permanently be typed as `false`

* chore: I don't understand these errors

Author: TkDodo

packages/query-core/src/__tests__/infiniteQueryObserver.test-d.tsx

@@ -51,8 +51,8 @@ describe('InfiniteQueryObserver', () => {
       expectTypeOf(result.data).toEqualTypeOf<InfiniteData<string, unknown>>()
       expectTypeOf(result.error).toEqualTypeOf<Error>()
       expectTypeOf(result.status).toEqualTypeOf<'error'>()
-      expectTypeOf(result.isFetchNextPageError).toEqualTypeOf<false>()
-      expectTypeOf(result.isFetchPreviousPageError).toEqualTypeOf<false>()
+      expectTypeOf(result.isFetchNextPageError).toEqualTypeOf<boolean>()
+      expectTypeOf(result.isFetchPreviousPageError).toEqualTypeOf<boolean>()
     }
 
     if (result.isSuccess) {

packages/query-core/src/types.ts

@@ -853,8 +853,6 @@ export interface InfiniteQueryObserverRefetchErrorResult<
   isLoading: false
   isLoadingError: false
   isRefetchError: true
-  isFetchNextPageError: false
-  isFetchPreviousPageError: false
   isSuccess: false
   status: 'error'
 }

packages/react-query/src/__tests__/useInfiniteQuery.test-d.tsx

@@ -117,3 +117,26 @@ describe('getNextPageParam / getPreviousPageParam', () => {
     >()
   })
 })
+
+describe('error booleans', () => {
+  it('should not be permanently `false`', () => {
+    const {
+      isFetchNextPageError,
+      isFetchPreviousPageError,
+      isLoadingError,
+      isRefetchError,
+    } = useInfiniteQuery({
+      queryKey: ['key'],
+      queryFn: ({ pageParam }) => {
+        return pageParam * 5
+      },
+      initialPageParam: 1,
+      getNextPageParam: () => undefined,
+    })
+
+    expectTypeOf(isFetchNextPageError).toEqualTypeOf<boolean>()
+    expectTypeOf(isFetchPreviousPageError).toEqualTypeOf<boolean>()
+    expectTypeOf(isLoadingError).toEqualTypeOf<boolean>()
+    expectTypeOf(isRefetchError).toEqualTypeOf<boolean>()
+  })
+})

packages/solid-query/src/__tests__/createInfiniteQuery.test.tsx

@@ -689,6 +689,7 @@ describe('useInfiniteQuery', () => {
     const states: Array<
       Partial<CreateInfiniteQueryResult<InfiniteData<number>>>
     > = []
+
     let isRefetch = false
 
     function Page() {
@@ -717,7 +718,7 @@ describe('useInfiniteQuery', () => {
           isFetchingNextPage: state.isFetchingNextPage,
           isFetchPreviousPageError: state.isFetchPreviousPageError,
           isFetchingPreviousPage: state.isFetchingPreviousPage,
-          isRefetchError: state.isRefetchError,
+          isRefetchError: state.isRefetchError as true,
           isRefetching: state.isRefetching,
         })
       })
@@ -828,7 +829,7 @@ describe('useInfiniteQuery', () => {
           isFetchingNextPage: state.isFetchingNextPage,
           isFetchPreviousPageError: state.isFetchPreviousPageError,
           isFetchingPreviousPage: state.isFetchingPreviousPage,
-          isRefetchError: state.isRefetchError,
+          isRefetchError: state.isRefetchError as true,
           isRefetching: state.isRefetching,
         })
       })
@@ -932,7 +933,7 @@ describe('useInfiniteQuery', () => {
           isFetchingNextPage: state.isFetchingNextPage,
           isFetchPreviousPageError: state.isFetchPreviousPageError,
           isFetchingPreviousPage: state.isFetchingPreviousPage,
-          isRefetchError: state.isRefetchError,
+          isRefetchError: state.isRefetchError as true,
           isRefetching: state.isRefetching,
         })
       })