test: add unit test for extracting string error from prefixed payload (#718)

* test: add unit test for extracting string error from prefixed payload

* DCO Remediation Commit for Jalina Hirushan <139668262+JalinaH@users.noreply.github.com>

I, Jalina Hirushan <139668262+JalinaH@users.noreply.github.com>, hereby add my Signed-off-by to this commit: 6767681

Signed-off-by: Jalina Hirushan <139668262+JalinaH@users.noreply.github.com>

---------

Signed-off-by: Jalina Hirushan <139668262+JalinaH@users.noreply.github.com>
Co-authored-by: Matt Roberts <7544022+mttrbrts@users.noreply.github.com>

Author: JalinaH

src/tests/utils/helpers/errorUtils.test.ts

@@ -53,6 +53,15 @@ describe("extractErrorMessage", () => {
       expect(result).toBe("invalid x-api-key");
     });
 
+    it("should extract string error from prefixed payload", () => {
+      const error = new Error(
+        'AuthenticationError: 401 {"error":"Simple error string"}'
+      );
+
+      const result = extractErrorMessage(error);
+      expect(result).toBe("Simple error string");
+    });
+
     it("should extract message from Anthropic pure JSON error", () => {
       const error = new Error(JSON.stringify({
         type: "error",

src/utils/helpers/errorUtils.ts

@@ -26,10 +26,10 @@ export const extractErrorMessage = (error: Error | unknown): string => {
               }
             }
           }
-          // Handle error as string
-          if (typeof parsed.error === 'string') {
-            return parsed.error;
-          }
+        }
+        // Handle error as string
+        if (typeof parsed.error === 'string') {
+          return parsed.error;
         }
       }
 
@@ -86,4 +86,4 @@ export const extractErrorMessage = (error: Error | unknown): string => {
   }
 
   return errorMessage;
-};
+};