Add a "pub dependencies" command.

sdk/lib/_internal/pub/test/ascii_tree_test.dart

Index: sdk/lib/_internal/pub/test/ascii_tree_test.dart
diff --git a/sdk/lib/_internal/pub/test/ascii_tree_test.dart b/sdk/lib/_internal/pub/test/ascii_tree_test.dart
new file mode 100644
index 0000000000000000000000000000000000000000..96d81ee7bc53fe8180dfd6ecf8ccb68d18809a3b
--- /dev/null
+++ b/sdk/lib/_internal/pub/test/ascii_tree_test.dart
@@ -0,0 +1,248 @@
+// Copyright (c) 2012, 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 lock_file_test;
+
+import 'package:unittest/unittest.dart';
+
+import '../lib/src/ascii_tree.dart' as tree;
+import '../lib/src/utils.dart';
+
+main() {
+  runningAsTest = true;
+
+  group('tree.fromFiles', () {
+    test('no files', () {
+      expect(tree.fromFiles([]), equals(""));
+    });
+
+    test('up to ten files in one directory are shown', () {
+      var files = [
+        "dir/a.dart",
+        "dir/b.dart",
+        "dir/c.dart",
+        "dir/d.dart",
+        "dir/e.dart",
+        "dir/f.dart",
+        "dir/g.dart",
+        "dir/h.dart",
+        "dir/i.dart",
+        "dir/j.dart"
+      ];
+      expect(tree.fromFiles(files), equals("""
+'-- dir
+    |-- a.dart
+    |-- b.dart
+    |-- c.dart
+    |-- d.dart
+    |-- e.dart
+    |-- f.dart
+    |-- g.dart
+    |-- h.dart
+    |-- i.dart
+    '-- j.dart
+"""));
+    });
+
+    test('files are elided if there are more than ten', () {
+      var files = [
+        "dir/a.dart",
+        "dir/b.dart",
+        "dir/c.dart",
+        "dir/d.dart",
+        "dir/e.dart",
+        "dir/f.dart",
+        "dir/g.dart",
+        "dir/h.dart",
+        "dir/i.dart",
+        "dir/j.dart",
+        "dir/k.dart"
+      ];
+      expect(tree.fromFiles(files), equals("""
+'-- dir
+    |-- a.dart
+    |-- b.dart
+    |-- c.dart
+    | (5 more...)
+    |-- i.dart
+    |-- j.dart
+    '-- k.dart
+"""));
+    });
+
+    test('files are not elided at the top level', () {
+      var files = [
+        "a.dart",
+        "b.dart",
+        "c.dart",
+        "d.dart",
+        "e.dart",
+        "f.dart",
+        "g.dart",
+        "h.dart",
+        "i.dart",
+        "j.dart",
+        "k.dart"
+      ];
+      expect(tree.fromFiles(files), equals("""
+|-- a.dart
+|-- b.dart
+|-- c.dart
+|-- d.dart
+|-- e.dart
+|-- f.dart
+|-- g.dart
+|-- h.dart
+|-- i.dart
+|-- j.dart
+'-- k.dart
+"""));
+    });
+
+    test('a complex example', () {
+      var files = [
+        "TODO",
+        "example/console_example.dart",
+        "example/main.dart",
+        "example/web copy/web_example.dart",
+        "test/absolute_test.dart",
+        "test/basename_test.dart",
+        "test/dirname_test.dart",
+        "test/extension_test.dart",
+        "test/is_absolute_test.dart",
+        "test/is_relative_test.dart",
+        "test/join_test.dart",
+        "test/normalize_test.dart",
+        "test/relative_test.dart",
+        "test/split_test.dart",
+        ".gitignore",
+        "README.md",
+        "lib/path.dart",
+        "pubspec.yaml",
+        "test/all_test.dart",
+        "test/path_posix_test.dart",
+        "test/path_windows_test.dart"
+      ];
+
+      expect(tree.fromFiles(files), equals("""
+|-- .gitignore
+|-- README.md
+|-- TODO
+|-- example
+|   |-- console_example.dart
+|   |-- main.dart
+|   '-- web copy
+|       '-- web_example.dart
+|-- lib
+|   '-- path.dart
+|-- pubspec.yaml
+'-- test
+    |-- absolute_test.dart
+    |-- all_test.dart
+    |-- basename_test.dart
+    | (7 more...)
+    |-- path_windows_test.dart
+    |-- relative_test.dart
+    '-- split_test.dart
+"""));
+    });
+  });
+
+  group('treeFromMap', () {
+    test('empty map', () {
+      expect(tree.fromMap({}), equals(""));
+    });
+
+    test('a complex example', () {
+      var map = {
+        ".gitignore": {},
+        "README.md": {},
+        "TODO": {},
+        "example": {
+          "console_example.dart": {},
+          "main.dart": {},
+          "web copy": {
+            "web_example.dart": {}
+          },
+        },
+        "lib": {
+          "path.dart": {}
+        },
+        "pubspec.yaml": {},
+        "test": {
+          "absolute_test.dart": {},
+          "basename_test.dart": {},
+          "dirname_test.dart": {},
+          "extension_test.dart": {},
+          "is_absolute_test.dart": {},
+          "is_relative_test.dart": {},
+          "join_test.dart": {},
+          "normalize_test.dart": {},
+          "relative_test.dart": {},
+          "split_test.dart": {}
+        }
+      };
+
+      expect(tree.fromMap(map), equals("""
+|-- .gitignore
+|-- README.md
+|-- TODO
+|-- example
+|   |-- console_example.dart
+|   |-- main.dart
+|   '-- web copy
+|       '-- web_example.dart
+|-- lib
+|   '-- path.dart
+|-- pubspec.yaml
+'-- test
+    |-- absolute_test.dart
+    |-- basename_test.dart
+    |-- dirname_test.dart
+    |-- extension_test.dart
+    |-- is_absolute_test.dart
+    |-- is_relative_test.dart
+    |-- join_test.dart
+    |-- normalize_test.dart
+    |-- relative_test.dart
+    '-- split_test.dart
+"""));
+    });
+  });
+
+  test('does not elide children if showAllChildren is true', () {
+    var map = {
+      'dir': {
+        'a.dart': {},
+        'b.dart': {},
+        'c.dart': {},
+        'd.dart': {},
+        'e.dart': {},
+        'f.dart': {},
+        'g.dart': {},
+        'h.dart': {},
+        'i.dart': {},
+        'j.dart': {},
+        'k.dart': {},
+        'l.dart': {},
+      }
+    };
+    expect(tree.fromMap(map, showAllChildren: true), equals("""
+'-- dir
+    |-- a.dart
+    |-- b.dart
+    |-- c.dart
+    |-- d.dart
+    |-- e.dart
+    |-- f.dart
+    |-- g.dart
+    |-- h.dart
+    |-- i.dart
+    |-- j.dart
+    |-- k.dart
+    '-- l.dart
+"""));
+  });
+
+}