Allow router to raise MethodNotAllowed

tests/test_router.py

@@ -10,20 +10,30 @@ def test_router_root_handler():
     async def d(_: dict, *args):
         pass
 
+    async def a(_: dict, *args):
+        pass
+
     r = Router()
     r.add('GET', '/', f)
     r.add('GET', '', f)
-    assert len(r._routes.keys()) == 1
-    assert len(r._routes['GET'].static_subroutes.keys()) == 0
-    assert r._routes['GET'].handler is not None
-    assert r._routes['GET'].handler == f
+    assert len(r._root.static_subroutes) == 0
+    assert len(r._root.handler) == 1
+    assert r._root.handler['GET'] == f
+
+    r.add('POST', '/', a)
+    assert len(r._root.static_subroutes) == 0
+    assert len(r._root.handler) == 2
+    assert r._root.handler['GET'] == f
+    assert r._root.handler['POST'] == a
 
     r.add('GET', '/asdf', d)
-    assert len(r._routes.keys()) == 1
-    assert len(r._routes['GET'].static_subroutes.keys()) == 1
-    assert r._routes['GET'].handler is not None
-    assert r._routes['GET'].handler == f
-    assert r._routes['GET'].static_subroutes['asdf'].handler == d
+    assert len(r._root.static_subroutes) == 1
+    assert len(r._root.handler) == 2
+    assert r._root.handler['GET'] == f
+    assert r._root.handler['POST'] == a
+    assert len(r._root.static_subroutes['asdf'].static_subroutes) == 0
+    assert len(r._root.static_subroutes['asdf'].handler) == 1
+    assert r._root.static_subroutes['asdf'].handler['GET'] == d
 
 
 def test_router_match():
@@ -36,5 +46,7 @@ def test_router_match():
     r = Router()
     r.add('GET', 'asdf', f)
     assert r.match('GET', '/asdf')
-    with pytest.raises(ValueError):
+    with pytest.raises(ValueError, match='404'):
         r.match('GET', 'asd')
+    with pytest.raises(ValueError, match='405'):
+        r.match('POST', 'asdf')