Fix bad introspection result for an endpoint URL string

Author: ianc-flwls

packages/action/__tests__/utils.test.ts

@@ -0,0 +1,22 @@
+import { parseEndpoint } from '../helpers/utils.js';
+
+describe('parseEndpoint', () => {
+  it('should parse an endpoint URL and provide default headers', () => {
+    const endpoint = parseEndpoint('https://api.github.com');
+    expect(endpoint).toEqual({
+      url: 'https://api.github.com',
+      method: 'POST',
+      headers: {
+        'Content-Type': 'application/json',
+      },
+    });
+  });
+
+  it('should parse an endpoint object and provide default headers', () => {
+    const endpoint = parseEndpoint({ url: 'https://api.github.com', method: 'GET' });
+    expect(endpoint).toEqual({
+      url: 'https://api.github.com',
+      method: 'GET',
+    });
+  });
+});

packages/action/helpers/utils.ts

@@ -112,6 +112,9 @@ export function parseEndpoint(endpoint: Endpoint): {
     return {
       url: endpoint,
       method: 'POST',
+      headers: {
+        'Content-Type': 'application/json',
+      }
     };
   }