fixing issue #39

mattphillips · Sep 8, 2022 · 7004dde · 7004dde
1 parent 0772823
commit 7004dde
Showing 1 changed file with 5 additions and 2 deletions.
diff --git a/src/withMessage.js b/src/withMessage.js
@@ -1,6 +1,6 @@
 class JestAssertionError extends Error {
   constructor(result, callsite) {
-    super(result.message());
+    super(typeof result.message === 'function' ? result.message() : result.message);
     this.matcherResult = result;
 
     if (Error.captureStackTrace) {
@@ -23,7 +23,10 @@ const wrapMatcher = (matcher, customMessage) => {
         throw new JestAssertionError(matcherResult, newMatcher);
       }
 
-      const message = () => 'Custom message:\n  ' + customMessage + '\n\n' + matcherResult.message();
+      const matcherMessage =
+        typeof error.matcherResult.message === 'function' ? error.matcherResult.message() : error.matcherResult.message;
+
+      const message = () => 'Custom message:\n  ' + customMessage + '\n\n' + matcherMessage;
 
       throw new JestAssertionError({ ...matcherResult, message }, newMatcher);
     }