From 5c12acefbb90d4328f896633b636c8e05d87a0dd Mon Sep 17 00:00:00 2001
From: David Lord <davidism@gmail.com>
Date: Mon, 5 Jun 2017 06:14:13 -0700
Subject: [PATCH] failing test

---
 tests/test_basic.py | 33 +++++++++++++++++++++++++++++++++
 1 file changed, 33 insertions(+)

diff --git a/tests/test_basic.py b/tests/test_basic.py
index 108c1409..d24678c2 100644
--- a/tests/test_basic.py
+++ b/tests/test_basic.py
@@ -980,6 +980,39 @@ def test_http_error_subclass_handling(app, client):
     assert client.get('/3').data == b'apple'
 
 
+def test_errorhandler_precedence(app, client):
+    class E1(Exception):
+        pass
+
+    class E2(Exception):
+        pass
+
+    class E3(E1, E2):
+        pass
+
+    @app.errorhandler(E2)
+    def handle_e2(e):
+        return 'E2'
+
+    @app.errorhandler(Exception)
+    def handle_exception(e):
+        return 'Exception'
+
+    @app.route('/E1')
+    def raise_e1():
+        raise E1
+
+    @app.route('/E3')
+    def raise_e3():
+        raise E3
+
+    rv = client.get('/E1')
+    assert rv.data == b'Exception'
+
+    rv = client.get('/E3')
+    assert rv.data == b'E2'
+
+
 def test_trapping_of_bad_request_key_errors(app, client):
     @app.route('/fail')
     def fail():