From 96ab856453395e22c52106ae8226e5e59b449fd3 Mon Sep 17 00:00:00 2001
From: Takuto Wada <takuto.wada@gmail.com>
Date: Sat, 18 Apr 2020 16:56:28 +0900
Subject: [PATCH] chore: sync with upstream changes in validation function
 message

---
 index.js     |  3 ++-
 test/test.js | 14 ++++++++------
 2 files changed, 10 insertions(+), 7 deletions(-)

diff --git a/index.js b/index.js
index 5403822..9e48b7c 100644
--- a/index.js
+++ b/index.js
@@ -109,10 +109,11 @@ function wantReject (stackStartFn, thennable, errorHandler, message) {
         if (handlerFuncResult === true) {
           return resolve();
         } else {
+          var validationFunctionName = errorHandler.name ? 'The "' + errorHandler.name + '" validation function' : 'The validation function';
           return reject(new AssertionError({
             actual: actualRejectionResult,
             expected: errorHandler,
-            message: message || 'The validation function is expected to return "true". Received ' + handlerFuncResult + '\n\nCaught error:\n\n' + actualRejectionResult,
+            message: message || validationFunctionName + ' is expected to return "true". Received ' + handlerFuncResult + '\n\nCaught error:\n\n' + actualRejectionResult,
             operator: stackStartFn.name,
             stackStartFn: stackStartFn
           }));
diff --git a/test/test.js b/test/test.js
index 9143155..6f390dc 100644
--- a/test/test.js
+++ b/test/test.js
@@ -282,17 +282,19 @@ implementations.forEach(function (impl) {
           } else {
             it('when returned value of validation function is NOT `true`, rejects with AssertionError.', function () {
               var e = new RangeError('Wrong range');
+              const handlerFn = (err) => {
+                return ((err instanceof TypeError) && /type/.test(err));
+              };
               return rejects(
                 willReject(e),
-                function (err) {
-                  return ((err instanceof TypeError) && /type/.test(err));
-                }
+                handlerFn
               ).then(shouldNotBeFulfilled, function (err) {
                 assert(err instanceof assert.AssertionError);
                 assert.equal(err.actual, e);
-                // assert.equal(err.expected, handler);
-                assert(/The validation function is expected to return "true". Received false/.test(err.message));
-                assert(/RangeError: Wrong range/.test(err.message));
+                assert.equal(err.expected, handlerFn);
+
+                assert(/The "handlerFn" validation function is expected to return "true". Received false/.test(err.message), `actual [${err.message}]`);
+                assert(/RangeError: Wrong range/.test(err.message), `actual [${err.message}]`);
               });
             });
           }