Add middleware for all current handlers

src/fastmcp/server/middleware.py

@@ -148,7 +148,7 @@ class MCPMiddleware:
                 handler = partial(self.on_list_tools, call_next=handler)
             case "resources/list":
                 handler = partial(self.on_list_resources, call_next=handler)
-            case "resource-templates/list":
+            case "resources/templates/list":
                 handler = partial(self.on_list_resource_templates, call_next=handler)
             case "prompts/list":
                 handler = partial(self.on_list_prompts, call_next=handler)

src/fastmcp/server/server.py

@@ -352,34 +352,8 @@ class FastMCP(Generic[LifespanResultT]):
 
     async def get_resources(self) -> dict[str, Resource]:
         """Get all registered resources, indexed by registered key."""
-        if (resources := self._cache.get("resources")) is self._cache.NOT_FOUND:
-            resources: dict[str, Resource] = {}
-
-            # iterate such that new mounts overwrite older ones
-            for mounted_server in self._mounted_servers:
-                try:
-                    server_resources = await mounted_server.server.get_resources()
-                    # Apply prefix to each resource key if prefix exists
-                    if mounted_server.prefix:
-                        for resource in server_resources.values():
-                            resource = resource.with_key(
-                                add_resource_prefix(
-                                    resource.key,
-                                    mounted_server.prefix,
-                                    self.resource_prefix_format,
-                                )
-                            )
-                            resources[resource.key] = resource
-                    else:
-                        resources.update(server_resources)
-                except Exception as e:
-                    logger.warning(
-                        f"Failed to get resources from mounted server '{mounted_server.prefix}': {e}"
-                    )
-                    continue
-            resources.update(self._resource_manager.get_resources())
-            self._cache.set("resources", resources)
-        return resources
+        resources = await self._list_resources(apply_middleware=False)
+        return {resource.key: resource for resource in resources}
 
     async def get_resource(self, key: str) -> Resource:
         resources = await self.get_resources()
@@ -389,39 +363,8 @@ class FastMCP(Generic[LifespanResultT]):
 
     async def get_resource_templates(self) -> dict[str, ResourceTemplate]:
         """Get all registered resource templates, indexed by registered key."""
-        if (
-            templates := self._cache.get("resource_templates")
-        ) is self._cache.NOT_FOUND:
-            templates: dict[str, ResourceTemplate] = {}
-
-            # iterate such that new mounts overwrite older ones
-            for mounted_server in self._mounted_servers:
-                try:
-                    server_templates = (
-                        await mounted_server.server.get_resource_templates()
-                    )
-                    # Apply prefix to each template key if prefix exists
-                    if mounted_server.prefix:
-                        for template in server_templates.values():
-                            template = template.with_key(
-                                add_resource_prefix(
-                                    template.key,
-                                    mounted_server.prefix,
-                                    self.resource_prefix_format,
-                                )
-                            )
-                            templates[template.key] = template
-                    else:
-                        templates.update(server_templates)
-                except Exception as e:
-                    logger.warning(
-                        "Failed to get resource templates from mounted server "
-                        f"'{mounted_server.prefix}': {e}"
-                    )
-                    continue
-            templates.update(self._resource_manager.get_templates())
-            self._cache.set("resource_templates", templates)
-        return templates
+        templates = await self._list_resource_templates(apply_middleware=False)
+        return {template.key: template for template in templates}
 
     async def get_resource_template(self, key: str) -> ResourceTemplate:
         templates = await self.get_resource_templates()
@@ -434,30 +377,8 @@ class FastMCP(Generic[LifespanResultT]):
         List all available prompts.
         """
 
-        if (prompts := self._cache.get("prompts")) is self._cache.NOT_FOUND:
-            prompts: dict[str, Prompt] = {}
-
-            # iterate such that new mounts overwrite older ones
-            for mounted_server in self._mounted_servers:
-                try:
-                    server_prompts = await mounted_server.server.get_prompts()
-                    # Apply prefix to each prompt key if prefix exists
-                    if mounted_server.prefix:
-                        for prompt in server_prompts.values():
-                            prompt = prompt.with_key(
-                                f"{mounted_server.prefix}_{prompt.key}"
-                            )
-                            prompts[prompt.key] = prompt
-                    else:
-                        prompts.update(server_prompts)
-                except Exception as e:
-                    logger.warning(
-                        f"Failed to get prompts from mounted server '{mounted_server.prefix}': {e}"
-                    )
-                    continue
-            prompts.update(self._prompt_manager.get_prompts())
-            self._cache.set("prompts", prompts)
-        return prompts
+        prompts = await self._list_prompts(apply_middleware=False)
+        return {prompt.key: prompt for prompt in prompts}
 
     async def get_prompt(self, key: str) -> Prompt:
         prompts = await self.get_prompts()
@@ -582,21 +503,31 @@ class FastMCP(Generic[LifespanResultT]):
         return tools
 
     async def _mcp_list_resources(self) -> list[MCPResource]:
+        logger.debug("Handler called: list_resources")
+
+        with fastmcp.server.context.Context(fastmcp=self):
+            resources = await self._middleware_list_resources()
+            return [
+                resource.to_mcp_resource(uri=resource.key) for resource in resources
+            ]
+
+    async def _middleware_list_resources(self) -> list[Resource]:
         """
         List all available resources, in the format expected by the low-level MCP
         server.
 
         """
-        logger.debug("Handler called: list_resources")
 
-        async def _final_handler(
+        async def _handler(
             context: MiddlewareContext[dict[str, Any]],
-        ) -> list[MCPResource]:
-            resources = await self.get_resources()
-            mcp_resources: list[MCPResource] = []
-            for key, resource in resources.items():
+        ) -> list[Resource]:
+            resources = await self._list_resources()
+
+            mcp_resources: list[Resource] = []
+            for resource in resources:
                 if self._should_enable_component(resource):
-                    mcp_resources.append(resource.to_mcp_resource(uri=key))
+                    mcp_resources.append(resource)
+
             return mcp_resources
 
         with fastmcp.server.context.Context(fastmcp=self) as fastmcp_ctx:
@@ -610,24 +541,74 @@ class FastMCP(Generic[LifespanResultT]):
             )
 
             # Apply the middleware chain.
-            return await self._apply_middleware(mw_context, _final_handler)
+            return await self._apply_middleware(mw_context, _handler)
+
+    async def _list_resources(self, apply_middleware: bool = True) -> list[Resource]:
+        """
+        List all available resources.
+        """
+
+        if (resources := self._cache.get("resources")) is self._cache.NOT_FOUND:
+            resources: list[Resource] = []
+
+            # iterate such that new mounts overwrite older ones
+            for mounted_server in self._mounted_servers:
+                try:
+                    if apply_middleware:
+                        server_resources = (
+                            await mounted_server.server._middleware_list_resources()
+                        )
+                    else:
+                        server_resources = await mounted_server.server._list_resources()
+                    # Apply prefix to each resource key if prefix exists
+                    if mounted_server.prefix:
+                        for resource in server_resources:
+                            resource = resource.with_key(
+                                add_resource_prefix(
+                                    resource.key,
+                                    mounted_server.prefix,
+                                    self.resource_prefix_format,
+                                )
+                            )
+                            resources.append(resource)
+                    else:
+                        resources.extend(server_resources)
+                except Exception as e:
+                    logger.warning(
+                        f"Failed to get resources from mounted server '{mounted_server.prefix}': {e}"
+                    )
+                    continue
+            resources.extend(self._resource_manager.get_resources().values())
+            self._cache.set("resources", resources)
+        return resources
 
     async def _mcp_list_resource_templates(self) -> list[MCPResourceTemplate]:
+        logger.debug("Handler called: list_resource_templates")
+
+        with fastmcp.server.context.Context(fastmcp=self):
+            templates = await self._middleware_list_resource_templates()
+            return [
+                template.to_mcp_template(uriTemplate=template.key)
+                for template in templates
+            ]
+
+    async def _middleware_list_resource_templates(self) -> list[ResourceTemplate]:
         """
-        List all available resource templates, in the format expected by the low-level
-        MCP server.
+        List all available resource templates, in the format expected by the low-level MCP
+        server.
 
         """
-        logger.debug("Handler called: list_resource_templates")
 
-        async def _final_handler(
+        async def _handler(
             context: MiddlewareContext[dict[str, Any]],
-        ) -> list[MCPResourceTemplate]:
-            templates = await self.get_resource_templates()
-            mcp_templates: list[MCPResourceTemplate] = []
-            for key, template in templates.items():
+        ) -> list[ResourceTemplate]:
+            templates = await self._list_resource_templates()
+
+            mcp_templates: list[ResourceTemplate] = []
+            for template in templates:
                 if self._should_enable_component(template):
-                    mcp_templates.append(template.to_mcp_template(uriTemplate=key))
+                    mcp_templates.append(template)
+
             return mcp_templates
 
         with fastmcp.server.context.Context(fastmcp=self) as fastmcp_ctx:
@@ -636,29 +617,81 @@ class FastMCP(Generic[LifespanResultT]):
                 message={},  # List resource templates doesn't have parameters
                 source="client",
                 type="request",
-                method="resources/list_templates",
+                method="resources/templates/list",
                 fastmcp_context=fastmcp_ctx,
             )
 
             # Apply the middleware chain.
-            return await self._apply_middleware(mw_context, _final_handler)
+            return await self._apply_middleware(mw_context, _handler)
+
+    async def _list_resource_templates(
+        self, apply_middleware: bool = True
+    ) -> list[ResourceTemplate]:
+        """
+        List all available resource templates.
+        """
+
+        if (
+            templates := self._cache.get("resource_templates")
+        ) is self._cache.NOT_FOUND:
+            templates: list[ResourceTemplate] = []
+
+            # iterate such that new mounts overwrite older ones
+            for mounted_server in self._mounted_servers:
+                try:
+                    if apply_middleware:
+                        server_templates = await mounted_server.server._middleware_list_resource_templates()
+                    else:
+                        server_templates = (
+                            await mounted_server.server._list_resource_templates()
+                        )
+                    # Apply prefix to each template key if prefix exists
+                    if mounted_server.prefix:
+                        for template in server_templates:
+                            template = template.with_key(
+                                add_resource_prefix(
+                                    template.key,
+                                    mounted_server.prefix,
+                                    self.resource_prefix_format,
+                                )
+                            )
+                            templates.append(template)
+                    else:
+                        templates.extend(server_templates)
+                except Exception as e:
+                    logger.warning(
+                        "Failed to get resource templates from mounted server "
+                        f"'{mounted_server.prefix}': {e}"
+                    )
+                    continue
+            templates.extend(self._resource_manager.get_templates().values())
+            self._cache.set("resource_templates", templates)
+        return templates
 
     async def _mcp_list_prompts(self) -> list[MCPPrompt]:
+        logger.debug("Handler called: list_prompts")
+
+        with fastmcp.server.context.Context(fastmcp=self):
+            prompts = await self._middleware_list_prompts()
+            return [prompt.to_mcp_prompt(name=prompt.key) for prompt in prompts]
+
+    async def _middleware_list_prompts(self) -> list[Prompt]:
         """
         List all available prompts, in the format expected by the low-level MCP
         server.
 
         """
-        logger.debug("Handler called: list_prompts")
 
-        async def _final_handler(
+        async def _handler(
             context: MiddlewareContext[dict[str, Any]],
-        ) -> list[MCPPrompt]:
-            prompts = await self.get_prompts()
-            mcp_prompts: list[MCPPrompt] = []
-            for key, prompt in prompts.items():
+        ) -> list[Prompt]:
+            prompts = await self._list_prompts()
+
+            mcp_prompts: list[Prompt] = []
+            for prompt in prompts:
                 if self._should_enable_component(prompt):
-                    mcp_prompts.append(prompt.to_mcp_prompt(name=key))
+                    mcp_prompts.append(prompt)
+
             return mcp_prompts
 
         with fastmcp.server.context.Context(fastmcp=self) as fastmcp_ctx:
@@ -672,7 +705,42 @@ class FastMCP(Generic[LifespanResultT]):
             )
 
             # Apply the middleware chain.
-            return await self._apply_middleware(mw_context, _final_handler)
+            return await self._apply_middleware(mw_context, _handler)
+
+    async def _list_prompts(self, apply_middleware: bool = True) -> list[Prompt]:
+        """
+        List all available prompts.
+        """
+
+        if (prompts := self._cache.get("prompts")) is self._cache.NOT_FOUND:
+            prompts: list[Prompt] = []
+
+            # iterate such that new mounts overwrite older ones
+            for mounted_server in self._mounted_servers:
+                try:
+                    if apply_middleware:
+                        server_prompts = (
+                            await mounted_server.server._middleware_list_prompts()
+                        )
+                    else:
+                        server_prompts = await mounted_server.server._list_prompts()
+                    # Apply prefix to each prompt key if prefix exists
+                    if mounted_server.prefix:
+                        for prompt in server_prompts:
+                            prompt = prompt.with_key(
+                                f"{mounted_server.prefix}_{prompt.key}"
+                            )
+                            prompts.append(prompt)
+                    else:
+                        prompts.extend(server_prompts)
+                except Exception as e:
+                    logger.warning(
+                        f"Failed to get prompts from mounted server '{mounted_server.prefix}': {e}"
+                    )
+                    continue
+            prompts.extend(self._prompt_manager.get_prompts().values())
+            self._cache.set("prompts", prompts)
+        return prompts
 
     async def _mcp_call_tool(
         self, key: str, arguments: dict[str, Any]

tests/server/middleware/test_middleware.py

@@ -21,9 +21,10 @@ class Recording:
 class RecordingMiddleware(MCPMiddleware):
     """A middleware that automatically records all method calls."""
 
-    def __init__(self):
+    def __init__(self, name: str | None = None):
         super().__init__()
         self.calls: list[Recording] = []
+        self.name = name
 
     def __getattribute__(self, name: str) -> Callable:
         """Dynamically create recording methods for any on_* method."""
@@ -95,7 +96,7 @@ class RecordingMiddleware(MCPMiddleware):
 @pytest.fixture
 def recording_middleware():
     """Fixture that provides a recording middleware instance."""
-    middleware = RecordingMiddleware()
+    middleware = RecordingMiddleware(name="recording_middleware")
     yield middleware
 
 
@@ -215,7 +216,7 @@ class TestMiddlewareHooks:
 
         assert recording_middleware.assert_called(times=3)
         assert recording_middleware.assert_called(
-            method="resource-templates/list", times=3
+            method="resources/templates/list", times=3
         )
         assert recording_middleware.assert_called(hook="on_message", times=1)
         assert recording_middleware.assert_called(hook="on_request", times=1)
@@ -234,3 +235,258 @@ class TestMiddlewareHooks:
         assert recording_middleware.assert_called(hook="on_message", times=1)
         assert recording_middleware.assert_called(hook="on_request", times=1)
         assert recording_middleware.assert_called(hook="on_list_prompts", times=1)
+
+
+class TestNestedMiddlewareHooks:
+    @pytest.fixture
+    @staticmethod
+    def nested_middleware():
+        return RecordingMiddleware(name="nested_middleware")
+
+    @pytest.fixture
+    def nested_mcp_server(self, nested_middleware: RecordingMiddleware):
+        mcp = FastMCP(name="Nested MCP")
+
+        @mcp.tool
+        def add(a: int, b: int) -> int:
+            return a + b
+
+        @mcp.resource("resource://test")
+        def test_resource() -> str:
+            return "test resource"
+
+        @mcp.resource("resource://test-template/{x}")
+        def test_resource_with_path(x: int) -> str:
+            return f"test resource with {x}"
+
+        @mcp.prompt
+        def test_prompt(x: str) -> str:
+            return f"test prompt with {x}"
+
+        @mcp.tool
+        async def progress_tool(context: Context) -> None:
+            await context.report_progress(progress=1, total=10, message="test")
+
+        @mcp.tool
+        async def log_tool(context: Context) -> None:
+            await context.info(message="test log")
+
+        @mcp.tool
+        async def sample_tool(context: Context) -> None:
+            await context.sample("hello")
+
+        mcp.add_middleware(nested_middleware)
+
+        return mcp
+
+    async def test_call_tool_on_parent_server(
+        self,
+        mcp_server: FastMCP,
+        nested_mcp_server: FastMCP,
+        recording_middleware: RecordingMiddleware,
+        nested_middleware: RecordingMiddleware,
+    ):
+        mcp_server.mount(nested_mcp_server, prefix="nested")
+
+        async with Client(mcp_server) as client:
+            await client.call_tool("add", {"a": 1, "b": 2})
+
+        assert recording_middleware.assert_called(times=3)
+        assert recording_middleware.assert_called(method="tools/call", times=3)
+        assert recording_middleware.assert_called(hook="on_message", times=1)
+        assert recording_middleware.assert_called(hook="on_request", times=1)
+        assert recording_middleware.assert_called(hook="on_call_tool", times=1)
+
+        assert nested_middleware.assert_called(times=0)
+
+    async def test_call_tool_on_nested_server(
+        self,
+        mcp_server: FastMCP,
+        nested_mcp_server: FastMCP,
+        recording_middleware: RecordingMiddleware,
+        nested_middleware: RecordingMiddleware,
+    ):
+        mcp_server.mount(nested_mcp_server, prefix="nested")
+
+        async with Client(mcp_server) as client:
+            await client.call_tool("nested_add", {"a": 1, "b": 2})
+
+        assert recording_middleware.assert_called(times=3)
+        assert recording_middleware.assert_called(method="tools/call", times=3)
+        assert recording_middleware.assert_called(hook="on_message", times=1)
+        assert recording_middleware.assert_called(hook="on_request", times=1)
+        assert recording_middleware.assert_called(hook="on_call_tool", times=1)
+
+        assert nested_middleware.assert_called(times=3)
+        assert nested_middleware.assert_called(method="tools/call", times=3)
+        assert nested_middleware.assert_called(hook="on_message", times=1)
+        assert nested_middleware.assert_called(hook="on_request", times=1)
+        assert nested_middleware.assert_called(hook="on_call_tool", times=1)
+
+    async def test_read_resource_on_parent_server(
+        self,
+        mcp_server: FastMCP,
+        nested_mcp_server: FastMCP,
+        recording_middleware: RecordingMiddleware,
+        nested_middleware: RecordingMiddleware,
+    ):
+        mcp_server.mount(nested_mcp_server, prefix="nested")
+
+        async with Client(mcp_server) as client:
+            await client.read_resource("resource://test")
+
+        assert recording_middleware.assert_called(times=3)
+        assert recording_middleware.assert_called(method="resources/read", times=3)
+        assert recording_middleware.assert_called(hook="on_message", times=1)
+        assert recording_middleware.assert_called(hook="on_request", times=1)
+        assert recording_middleware.assert_called(hook="on_read_resource", times=1)
+
+        assert nested_middleware.assert_called(times=0)
+
+    async def test_read_resource_on_nested_server(
+        self,
+        mcp_server: FastMCP,
+        nested_mcp_server: FastMCP,
+        recording_middleware: RecordingMiddleware,
+        nested_middleware: RecordingMiddleware,
+    ):
+        mcp_server.mount(nested_mcp_server, prefix="nested")
+
+        async with Client(mcp_server) as client:
+            await client.read_resource("resource://nested/test")
+
+        assert recording_middleware.assert_called(times=3)
+        assert recording_middleware.assert_called(method="resources/read", times=3)
+        assert recording_middleware.assert_called(hook="on_message", times=1)
+        assert recording_middleware.assert_called(hook="on_request", times=1)
+        assert recording_middleware.assert_called(hook="on_read_resource", times=1)
+
+        assert nested_middleware.assert_called(times=3)
+        assert nested_middleware.assert_called(method="resources/read", times=3)
+        assert nested_middleware.assert_called(hook="on_message", times=1)
+        assert nested_middleware.assert_called(hook="on_request", times=1)
+        assert nested_middleware.assert_called(hook="on_read_resource", times=1)
+
+    async def test_get_prompt_on_parent_server(
+        self,
+        mcp_server: FastMCP,
+        nested_mcp_server: FastMCP,
+        recording_middleware: RecordingMiddleware,
+        nested_middleware: RecordingMiddleware,
+    ):
+        mcp_server.mount(nested_mcp_server, prefix="nested")
+
+        async with Client(mcp_server) as client:
+            await client.get_prompt("test_prompt", {"x": "test"})
+
+        assert recording_middleware.assert_called(times=3)
+        assert recording_middleware.assert_called(method="prompts/get", times=3)
+        assert recording_middleware.assert_called(hook="on_message", times=1)
+        assert recording_middleware.assert_called(hook="on_request", times=1)
+        assert recording_middleware.assert_called(hook="on_get_prompt", times=1)
+
+        assert nested_middleware.assert_called(times=0)
+
+    async def test_get_prompt_on_nested_server(
+        self,
+        mcp_server: FastMCP,
+        nested_mcp_server: FastMCP,
+        recording_middleware: RecordingMiddleware,
+        nested_middleware: RecordingMiddleware,
+    ):
+        mcp_server.mount(nested_mcp_server, prefix="nested")
+
+        async with Client(mcp_server) as client:
+            await client.get_prompt("nested_test_prompt", {"x": "test"})
+
+        assert recording_middleware.assert_called(times=3)
+        assert recording_middleware.assert_called(method="prompts/get", times=3)
+        assert recording_middleware.assert_called(hook="on_message", times=1)
+        assert recording_middleware.assert_called(hook="on_request", times=1)
+        assert recording_middleware.assert_called(hook="on_get_prompt", times=1)
+
+        assert nested_middleware.assert_called(times=3)
+        assert nested_middleware.assert_called(method="prompts/get", times=3)
+        assert nested_middleware.assert_called(hook="on_message", times=1)
+        assert nested_middleware.assert_called(hook="on_request", times=1)
+        assert nested_middleware.assert_called(hook="on_get_prompt", times=1)
+
+    async def test_list_tools_on_nested_server(
+        self,
+        mcp_server: FastMCP,
+        nested_mcp_server: FastMCP,
+        recording_middleware: RecordingMiddleware,
+        nested_middleware: RecordingMiddleware,
+    ):
+        mcp_server.mount(nested_mcp_server, prefix="nested")
+
+        async with Client(mcp_server) as client:
+            await client.list_tools()
+
+        assert recording_middleware.assert_called(times=3)
+        assert recording_middleware.assert_called(method="tools/list", times=3)
+        assert recording_middleware.assert_called(hook="on_message", times=1)
+        assert recording_middleware.assert_called(hook="on_request", times=1)
+        assert recording_middleware.assert_called(hook="on_list_tools", times=1)
+
+        assert nested_middleware.assert_called(times=3)
+        assert nested_middleware.assert_called(method="tools/list", times=3)
+        assert nested_middleware.assert_called(hook="on_message", times=1)
+        assert nested_middleware.assert_called(hook="on_request", times=1)
+        assert nested_middleware.assert_called(hook="on_list_tools", times=1)
+
+    async def test_list_resources_on_nested_server(
+        self,
+        mcp_server: FastMCP,
+        nested_mcp_server: FastMCP,
+        recording_middleware: RecordingMiddleware,
+        nested_middleware: RecordingMiddleware,
+    ):
+        mcp_server.mount(nested_mcp_server, prefix="nested")
+
+        async with Client(mcp_server) as client:
+            await client.list_resources()
+
+        assert recording_middleware.assert_called(times=3)
+        assert recording_middleware.assert_called(method="resources/list", times=3)
+        assert recording_middleware.assert_called(hook="on_message", times=1)
+        assert recording_middleware.assert_called(hook="on_request", times=1)
+        assert recording_middleware.assert_called(hook="on_list_resources", times=1)
+
+        assert nested_middleware.assert_called(times=3)
+        assert nested_middleware.assert_called(method="resources/list", times=3)
+        assert nested_middleware.assert_called(hook="on_message", times=1)
+        assert nested_middleware.assert_called(hook="on_request", times=1)
+        assert nested_middleware.assert_called(hook="on_list_resources", times=1)
+
+    async def test_list_resource_templates_on_nested_server(
+        self,
+        mcp_server: FastMCP,
+        nested_mcp_server: FastMCP,
+        recording_middleware: RecordingMiddleware,
+        nested_middleware: RecordingMiddleware,
+    ):
+        mcp_server.mount(nested_mcp_server, prefix="nested")
+
+        async with Client(mcp_server) as client:
+            await client.list_resource_templates()
+
+        assert recording_middleware.assert_called(times=3)
+        assert recording_middleware.assert_called(
+            method="resources/templates/list", times=3
+        )
+        assert recording_middleware.assert_called(hook="on_message", times=1)
+        assert recording_middleware.assert_called(hook="on_request", times=1)
+        assert recording_middleware.assert_called(
+            hook="on_list_resource_templates", times=1
+        )
+
+        assert nested_middleware.assert_called(times=3)
+        assert nested_middleware.assert_called(
+            method="resources/templates/list", times=3
+        )
+        assert nested_middleware.assert_called(hook="on_message", times=1)
+        assert nested_middleware.assert_called(hook="on_request", times=1)
+        assert nested_middleware.assert_called(
+            hook="on_list_resource_templates", times=1
+        )