Merge pull request #416 from subyraman/more-view-tests

Add CompositionView tests, simplify checks for invalid/duplicate methods

sanic/sanic.py

@@ -17,6 +17,7 @@ from .response import HTTPResponse
 from .router import Router
 from .server import serve, serve_multiple, HttpProtocol
 from .static import register as static_register
+from .views import CompositionView
 
 
 class Sanic:
@@ -120,7 +121,16 @@ class Sanic:
         """
         # Handle HTTPMethodView differently
         if hasattr(handler, 'view_class'):
-            methods = frozenset(HTTP_METHODS)
+            methods = set()
+
+            for method in HTTP_METHODS:
+                if getattr(handler.view_class, method.lower(), None):
+                    methods.add(method)
+
+        # handle composition view differently
+        if isinstance(handler, CompositionView):
+            methods = handler.handlers.keys()
+
         self.route(uri=uri, methods=methods, host=host)(handler)
         return handler
 

sanic/views.py

@@ -1,4 +1,5 @@
 from .exceptions import InvalidUsage
+from .constants import HTTP_METHODS
 
 
 class HTTPMethodView:
@@ -40,11 +41,7 @@ class HTTPMethodView:
 
     def dispatch_request(self, request, *args, **kwargs):
         handler = getattr(self, request.method.lower(), None)
-        if handler:
         return handler(request, *args, **kwargs)
-        raise InvalidUsage(
-            'Method {} not allowed for URL {}'.format(
-                request.method, request.url), status_code=405)
 
     @classmethod
     def as_view(cls, *class_args, **class_kwargs):
@@ -89,15 +86,15 @@ class CompositionView:
 
     def add(self, methods, handler):
         for method in methods:
+            if method not in HTTP_METHODS:
+                raise InvalidUsage(
+                    '{} is not a valid HTTP method.'.format(method))
+
             if method in self.handlers:
-                raise KeyError(
-                    'Method {} already is registered.'.format(method))
+                raise InvalidUsage(
+                    'Method {} is already registered.'.format(method))
             self.handlers[method] = handler
 
     def __call__(self, request, *args, **kwargs):
-        handler = self.handlers.get(request.method.upper(), None)
-        if handler is None:
-            raise InvalidUsage(
-                'Method {} not allowed for URL {}'.format(
-                    request.method, request.url), status_code=405)
+        handler = self.handlers[request.method.upper()]
         return handler(request, *args, **kwargs)

tests/test_views.py

@@ -1,8 +1,9 @@
 import pytest as pytest
 
 from sanic import Sanic
+from sanic.exceptions import InvalidUsage
 from sanic.response import text, HTTPResponse
-from sanic.views import HTTPMethodView
+from sanic.views import HTTPMethodView, CompositionView
 from sanic.blueprints import Blueprint
 from sanic.request import Request
 from sanic.utils import sanic_endpoint_test
@@ -196,3 +197,65 @@ def test_with_decorator():
     request, response = sanic_endpoint_test(app, method="get")
     assert response.text == 'I am get method'
     assert results[0] == 1
+
+
+def test_composition_view_rejects_incorrect_methods():
+    def foo(request):
+        return text('Foo')
+
+    view = CompositionView()
+
+    with pytest.raises(InvalidUsage) as e:
+        view.add(['GET', 'FOO'], foo)
+
+    assert str(e.value) == 'FOO is not a valid HTTP method.'
+
+
+def test_composition_view_rejects_duplicate_methods():
+    def foo(request):
+        return text('Foo')
+
+    view = CompositionView()
+
+    with pytest.raises(InvalidUsage) as e:
+        view.add(['GET', 'POST', 'GET'], foo)
+
+    assert str(e.value) == 'Method GET is already registered.'
+
+
+@pytest.mark.parametrize('method', HTTP_METHODS)
+def test_composition_view_runs_methods_as_expected(method):
+    app = Sanic('test_composition_view')
+
+    view = CompositionView()
+    view.add(['GET', 'POST', 'PUT'], lambda x: text('first method'))
+    view.add(['DELETE', 'PATCH'], lambda x: text('second method'))
+
+    app.add_route(view, '/')
+
+    if method in ['GET', 'POST', 'PUT']:
+        request, response = sanic_endpoint_test(app, uri='/', method=method)
+        assert response.text == 'first method'
+
+    if method in ['DELETE', 'PATCH']:
+        request, response = sanic_endpoint_test(app, uri='/', method=method)
+        assert response.text == 'second method'
+
+
+@pytest.mark.parametrize('method', HTTP_METHODS)
+def test_composition_view_rejects_invalid_methods(method):
+    app = Sanic('test_composition_view')
+
+    view = CompositionView()
+    view.add(['GET', 'POST', 'PUT'], lambda x: text('first method'))
+
+    app.add_route(view, '/')
+
+    if method in ['GET', 'POST', 'PUT']:
+        request, response = sanic_endpoint_test(app, uri='/', method=method)
+        assert response.status == 200
+        assert response.text == 'first method'
+
+    if method in ['DELETE', 'PATCH']:
+        request, response = sanic_endpoint_test(app, uri='/', method=method)
+        assert response.status == 405