fix(metadata): fix thunk type detection (#2125)

kerwanp · web-flow · commit a041c2d340a4 · 2025-05-10T08:15:25.000-06:00
diff --git a/.changeset/mean-colts-hunt.md b/.changeset/mean-colts-hunt.md
@@ -0,0 +1,5 @@
+---
+"openapi-metadata": patch
+---
+
+[#2123](https://github.com/openapi-ts/openapi-typescript/issues/2123) Fix thunk type detection
diff --git a/packages/openapi-metadata/src/utils/metadata.ts b/packages/openapi-metadata/src/utils/metadata.ts
@@ -35,7 +35,7 @@ export function findType({ metadataKey, prototype, propertyKey }: FindTypeOption
   return reflectedType;
 }
 
-const IS_THUNK_REG = /.+=>[\w\d\s\t\n\r]*/;
+const IS_THUNK_REG = /^.+=>[\w\d\s\t\n\r]*/;
 
 /**
  * Asserts that a value is a thunk value.
diff --git a/packages/openapi-metadata/test/utils/metadata.test.ts b/packages/openapi-metadata/test/utils/metadata.test.ts
@@ -12,6 +12,14 @@ test("isThunk", () => {
   expect(isThunk(User)).toBe(false);
   expect(isThunk(() => User)).toBe(true);
 
+  class InsideThunk {
+    test() {
+      return [].map(() => {});
+    }
+  }
+  expect(isThunk(InsideThunk)).toBe(false);
+  expect(isThunk(() => InsideThunk)).toBe(true);
+
   expect(
     isThunk(() => {
       return "TESTEST";

-Original file line number
+Diff line change
@@ @@ -0,0 +1,5 @@ @@
 +---
 +"openapi-metadata": patch
 +---
++
 +[#2123](https://github.com/openapi-ts/openapi-typescript/issues/2123) Fix thunk type detection
Original file line number	Diff line number	Diff line change
`@@ -35,7 +35,7 @@ export function findType({ metadataKey, prototype, propertyKey }: FindTypeOption`
`35`	`35`	`return reflectedType;`
`36`	`36`	`}`
`37`	`37`
`38`		`-const IS_THUNK_REG = /.+=>[\w\d\s\t\n\r]*/;`
	`38`	`+const IS_THUNK_REG = /^.+=>[\w\d\s\t\n\r]*/;`
`39`	`39`
`40`	`40`	`/**`
`41`	`41`	`* Asserts that a value is a thunk value.`