pkg/shelf: rename Stack to Pipeline

pkg/shelf/test/stack_test.dart

Index: pkg/shelf/test/stack_test.dart
diff --git a/pkg/shelf/test/stack_test.dart b/pkg/shelf/test/stack_test.dart
deleted file mode 100644
index 8ff29d61360ccf68f9e3313dcc56f191b6ab4146..0000000000000000000000000000000000000000
--- a/pkg/shelf/test/stack_test.dart
+++ /dev/null
@@ -1,91 +0,0 @@
-// Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
-// for details. All rights reserved. Use of this source code is governed by a
-// BSD-style license that can be found in the LICENSE file.
-
-library shelf.shelf_stack_test;
-
-import 'package:shelf/shelf.dart';
-import 'package:unittest/unittest.dart';
-
-import 'test_util.dart';
-
-void main() {
-  test('compose middleware with Stack', () {
-    int accessLocation = 0;
-
-    var middlewareA = createMiddleware(requestHandler: (request) {
-      expect(accessLocation, 0);
-      accessLocation = 1;
-      return null;
-    }, responseHandler: (response) {
-      expect(accessLocation, 4);
-      accessLocation = 5;
-      return response;
-    });
-
-    var middlewareB = createMiddleware(requestHandler: (request) {
-      expect(accessLocation, 1);
-      accessLocation = 2;
-      return null;
-    }, responseHandler: (response) {
-      expect(accessLocation, 3);
-      accessLocation = 4;
-      return response;
-    });
-
-    var handler = const Stack()
-        .addMiddleware(middlewareA)
-        .addMiddleware(middlewareB)
-        .addHandler((request) {
-      expect(accessLocation, 2);
-      accessLocation = 3;
-      return syncHandler(request);
-    });
-
-    return makeSimpleRequest(handler).then((response) {
-      expect(response, isNotNull);
-      expect(accessLocation, 5);
-    });
-  });
-
-  test('Stack can be used as middleware', () {
-    int accessLocation = 0;
-
-    var middlewareA = createMiddleware(requestHandler: (request) {
-      expect(accessLocation, 0);
-      accessLocation = 1;
-      return null;
-    }, responseHandler: (response) {
-      expect(accessLocation, 4);
-      accessLocation = 5;
-      return response;
-    });
-
-    var middlewareB = createMiddleware(requestHandler: (request) {
-      expect(accessLocation, 1);
-      accessLocation = 2;
-      return null;
-    }, responseHandler: (response) {
-      expect(accessLocation, 3);
-      accessLocation = 4;
-      return response;
-    });
-
-    var innerStack = const Stack()
-        .addMiddleware(middlewareA)
-        .addMiddleware(middlewareB);
-
-    var handler = const Stack()
-        .addMiddleware(innerStack.middleware)
-        .addHandler((request) {
-      expect(accessLocation, 2);
-      accessLocation = 3;
-      return syncHandler(request);
-    });
-
-    return makeSimpleRequest(handler).then((response) {
-      expect(response, isNotNull);
-      expect(accessLocation, 5);
-    });
-  });
-}