fix: recursively simplify returned objects (#1847)

nitrojs · Oct 21, 2023 · e37359c · e37359c
1 parent 3611071
commit e37359c
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Showing 2 changed files with 26 additions and 1 deletion.
diff --git a/src/types/serialize.ts b/src/types/serialize.ts
@@ -53,4 +53,4 @@ type SerializeObject<T extends object> = {
  */
 export type Simplify<TType> = TType extends any[] | Date
   ? TType
-  : { [K in keyof TType]: TType[K] };
+  : { [K in keyof TType]: Simplify<TType[K]> };
diff --git a/test/fixture/types.ts b/test/fixture/types.ts
@@ -3,6 +3,7 @@ import { describe, it } from "vitest";
 import { EventHandler, EventHandlerRequest, defineEventHandler } from "h3";
 import { $Fetch } from "../..";
 import { defineNitroConfig } from "../../src/config";
+import { Serialize, Simplify } from "../../src/types";
 
 interface TestResponse {
   message: string;
@@ -307,3 +308,27 @@ describe("defineCachedEventHandler", () => {
     >();
   });
 });
+
+describe("type helpers", () => {
+  it("Serialize", () => {
+    expectTypeOf<Serialize<{ test: Date }>>().toEqualTypeOf<{ test: string }>();
+    expectTypeOf<Serialize<{ test: Map<string, string> }>>().toEqualTypeOf<{
+      test: Record<string, never>;
+    }>();
+    expectTypeOf<
+      Serialize<{ nested: { test: Map<string, string> } }>
+    >().toEqualTypeOf<{ nested: { test: Record<string, never> } }>();
+  });
+
+  it("Simplify", () => {
+    expectTypeOf<Simplify<Serialize<{ test: Date }>>>().toEqualTypeOf<{
+      test: string;
+    }>();
+    expectTypeOf<
+      Simplify<Serialize<{ test: Map<string, string> }>>
+    >().toEqualTypeOf<{ test: Record<string, never> }>();
+    expectTypeOf<
+      Simplify<Serialize<{ nested: { test: Map<string, string> } }>>
+    >().toEqualTypeOf<{ nested: { test: Record<string, never> } }>();
+  });
+});