feat: support any response type with media type containing application + json

Author: astahmer

.changeset/seven-taxis-remain.md

@@ -0,0 +1,5 @@
+---
+"typed-openapi": patch
+---
+
+Allow any response type with media type containing application + json

packages/typed-openapi/src/map-openapi-endpoints.ts

@@ -233,7 +233,7 @@ const isAllowedParamMediaTypes = (
   allowedParamMediaTypes.includes(mediaType as any) ||
   mediaType.includes("text/");
 
-const isResponseMediaType = (mediaType: string) => mediaType === "application/json" || mediaType === "*/*";
+const isResponseMediaType = (mediaType: string) => mediaType === "*/*" || (mediaType.includes("application/") && mediaType.includes("json"));
 const getAlias = ({ path, method, operation }: Endpoint) =>
   sanitizeName(
     (method + "_" + capitalize(operation.operationId ?? pathToVariableName(path))).replace(/-/g, "__"),

packages/typed-openapi/tests/issue-response-vnd-json.test.ts

@@ -0,0 +1,50 @@
+import { describe, test } from "vitest";
+import { mapOpenApiEndpoints } from "../src/map-openapi-endpoints.ts";
+import type { OpenAPIObject } from "openapi3-ts/oas31";
+
+const openApiDoc: OpenAPIObject = {
+  openapi: "3.0.3",
+  info: { title: "Test API Spec", version: "1.0.0" },
+  paths: {
+    "/test": {
+      get: {
+        operationId: "getTest",
+        responses: {
+          "200": {
+            content: {
+              "application/vnd.github.v3.star+json": {
+                schema: {
+                  type: "array",
+                  items: { $ref: "#/components/schemas/Response" },
+                },
+              },
+            },
+          },
+        },
+      },
+    },
+  },
+  components: {
+    schemas: {
+      Response: {
+        type: "object",
+        properties: {
+          id: { type: "integer" },
+          name: { type: "string" },
+        },
+      },
+    },
+  },
+};
+
+describe("issue-52: response of content type '*/*'", () => {
+  test("should not resolve response as unknown", ({ expect }) => {
+    const result = mapOpenApiEndpoints(openApiDoc);
+    // Find the endpoint by alias (see getAlias logic: 'get_GetTest')
+    const endpoint = result.endpointList.find(e => e.meta.alias === "get_GetTest");
+    expect(endpoint).toBeDefined();
+    // The bug: endpoint.response is 'unknown' instead of the correct type
+    expect(endpoint?.response).not.toMatchObject({ type: "keyword", value: "unknown" });
+    expect(endpoint?.response).toMatchObject({ type: "array", value: "Array<Response>" });
+  });
+});