Issue 15037. Warn users if they have “assets” dir anywhere inside “web” dir (http://dartbug.com/150…

sdk/lib/_internal/pub/test/build/warns_on_assets_paths_test.dart

Index: sdk/lib/_internal/pub/test/build/warns_on_assets_paths_test.dart
diff --git a/sdk/lib/_internal/pub/test/build/warns_on_assets_paths_test.dart b/sdk/lib/_internal/pub/test/build/warns_on_assets_paths_test.dart
new file mode 100644
index 0000000000000000000000000000000000000000..67eb1b5925ae2f0a19faca1fe9a8b2ddeccf7bbb
--- /dev/null
+++ b/sdk/lib/_internal/pub/test/build/warns_on_assets_paths_test.dart
@@ -0,0 +1,97 @@
+// Copyright (c) 2013, 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 pub_tests;
+
+import 'package:path/path.dart' as path;
+
+import '../descriptor.dart' as d;
+import '../test_pub.dart';
+
+getWarningRegExp(String assetsPath) => new RegExp(
+    '^Warning: Pub reserves paths containing "assets" for using assets from '
+    'packages\\. Please rename the path "$assetsPath"\\.\$');
+
+main() {
+  initConfig();
+
+  integration('warns user about assets dir in the root of "web"', () {
+    d.dir(appPath, [
+      d.appPubspec(),
+      d.dir('web', [
+        d.file('index.html'),
+        d.dir('assets')
+      ])
+    ]).create();
+
+    var assetsPath = path.join('web', 'assets');
+    schedulePub(args: ['build'],
+        error: getWarningRegExp(assetsPath),
+        exitCode: 0);
+  });
+
+  integration('warns user about assets dir nested anywhere in "web"', () {
+    d.dir(appPath, [
+      d.appPubspec(),
+      d.dir('web', [
+        d.file('index.html'),
+        d.dir('foo', [
+          d.dir('assets')
+        ])
+      ])
+    ]).create();
+
+    var assetsPath = path.join('web', 'foo', 'assets');
+    schedulePub(args: ['build'],
+        error: getWarningRegExp(assetsPath),
+        exitCode: 0);
+  });
+
+  integration('warns user about assets file in the root of "web"', () {
+    d.dir(appPath, [
+      d.appPubspec(),
+      d.dir('web', [
+        d.file('index.html'),
+        d.file('assets')
+      ])
+    ]).create();
+
+    var assetsPath = path.join('web', 'assets');
+    schedulePub(args: ['build'],
+        error: getWarningRegExp(assetsPath),
+        exitCode: 0);
+  });
+
+  integration('warns user about assets file nested anywhere in "web"', () {
+    d.dir(appPath, [
+      d.appPubspec(),
+      d.dir('web', [
+        d.file('index.html'),
+        d.dir('foo', [
+          d.file('assets')
+        ])
+      ])
+    ]).create();
+
+    var assetsPath = path.join('web', 'foo', 'assets');
+    schedulePub(args: ['build'],
+        error: getWarningRegExp(assetsPath),
+        exitCode: 0);
+  });
+
+  integration('does not warn if no assets dir or file anywhere in "web"', () {
+    d.dir(appPath, [
+      d.appPubspec(),
+      d.dir('web', [
+        d.file('index.html'),
+        d.dir('foo')
+      ])
+    ]).create();
+
+    schedulePub(args: ['build'],
+        error: new RegExp(
+            r'^(?!Warning: Pub reserves paths containing "assets").*$'),
+        exitCode: 0);
+  });
+}