Add support for listing to the glob package.

pkg/glob/test/list_test.dart

+// 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.
+
+import 'dart:io';
+
+import 'package:glob/glob.dart';
+import 'package:glob/src/utils.dart';
+import 'package:path/path.dart' as p;
+import 'package:scheduled_test/descriptor.dart' as d;
+import 'package:scheduled_test/scheduled_test.dart';
+
+String sandbox;
+
+void main() {
+  setUp(() {
+    scheduleSandbox();
+
+    d.dir("foo", [
+      d.file("bar"),
+      d.dir("baz", [
+        d.file("bang"),
+        d.file("qux")
+      ])
+    ]).create();
+  });
+
+  test("list() fails if the context doesn't match the system context", () {
+    expect(new Glob("*", context: p.url).list, throwsStateError);
+  });
+
+  test("listSync() fails if the context doesn't match the system context", () {
+    expect(new Glob("*", context: p.url).listSync, throwsStateError);
+  });
+
+  syncAndAsync((list) {
+    group("literals", () {
+      test("lists a single literal", () {
+        expect(list("foo/baz/qux"), completion(equals(["foo/baz/qux"])));
+      });
+
+      test("lists a non-matching literal", () {
+        expect(list("foo/baz/nothing"), completion(isEmpty));
+      });
+    });
+
+    group("star", () {
+      test("lists within filenames but not across directories", () {
+        expect(list("foo/b*"),
+            completion(unorderedEquals(["foo/bar", "foo/baz"])));
+      });
+
+      test("lists the empy string", () {
+        expect(list("foo/bar*"), completion(equals(["foo/bar"])));
+      });
+    });
+
+    group("double star", () {
+      test("lists within filenames", () {
+        expect(list("foo/baz/**"),
+            completion(unorderedEquals(["foo/baz/qux", "foo/baz/bang"])));
+      });
+
+      test("lists the empty string", () {
+        expect(list("foo/bar**"), completion(equals(["foo/bar"])));
+      });
+
+      test("lists recursively", () {
+        expect(list("foo/**"), completion(unorderedEquals(

[Bob Nystrom, 2014/09/18 22:17:40]

How about using "foo/ba**" here to validate that "**" mixes with literals
correctly.

[nweiz, 2014/09/22 23:48:40]

Done.

+            ["foo/bar", "foo/baz", "foo/baz/qux", "foo/baz/bang"])));
+      });
+
+      test("lists recursively in the middle of a glob", () {
+        d.dir("deep", [
+          d.dir("a", [
+            d.dir("b", [
+              d.dir("c", [d.file("d")])
+            ])
+          ])
+        ]).create();
+
+        expect(list("deep/**/?/?"),
+            completion(unorderedEquals(["deep/a/b/c", "deep/a/b/c/d"])));

[Bob Nystrom, 2014/09/18 22:17:40]

It would be good to have a couple of non-matching files here.

[nweiz, 2014/09/22 23:48:40]

Done.

+      });
+    });
+
+    group("any char", () {
+      test("matches a character", () {
+        expect(list("foo/ba?"),
+            completion(unorderedEquals(["foo/bar", "foo/baz"])));
+      });
+
+      test("doesn't match a separator", () {
+        expect(list("foo?bar"), completion(isEmpty));
+      });
+    });
+
+    group("range", () {
+      test("matches a range of characters", () {
+        expect(list("foo/ba[a-z]"),
+            completion(unorderedEquals(["foo/bar", "foo/baz"])));
+      });
+
+      test("matches a specific list of characters", () {
+        expect(list("foo/ba[rz]"),
+            completion(unorderedEquals(["foo/bar", "foo/baz"])));
+      });

[Bob Nystrom, 2014/09/18 22:17:41]

These could both benefit from a negative example.

[nweiz, 2014/09/22 23:48:40]

Done.

+    });
+
+    test("the same file shouldn't be non-recursively listed multiple times",
+        () {
+      d.dir("multi", [
+        d.dir("start-end", [d.file("file")])
+      ]).create();
+
+      expect(list("multi/{start-*/f*,*-end/*e}"),
+          completion(equals(["multi/start-end/file"])));
+    });
+
+    test("the same file shouldn't be recursively listed multiple times", () {
+      d.dir("multi", [
+        d.dir("a", [
+          d.dir("b", [
+            d.file("file"),
+            d.dir("c", [
+              d.file("file")
+            ])
+          ]),
+          d.dir("x", [
+            d.dir("y", [
+              d.file("file")
+            ])
+          ])
+        ])
+      ]).create();
+
+      expect(list("multi/{*/*/*/file,a/**/file}"), completion(unorderedEquals([
+        "multi/a/b/file", "multi/a/b/c/file", "multi/a/x/y/file"
+      ])));
+    });
+
+    group("with symlinks", () {
+      setUp(() {
+        schedule(() {
+          return new Link(p.join(sandbox, "dir", "link"))
+              .create(p.join(sandbox, "foo", "baz"), recursive: true);
+        }, "symlink foo/baz to dir/link");
+      });
+
+      test("follows symlinks by default", () {
+        expect(list("dir/**"), completion(unorderedEquals([
+          "dir/link", "dir/link/bang", "dir/link/qux"
+        ])));
+      });
+
+      test("doesn't follow symlinks with followLinks: false", () {
+        expect(list("dir/**", followLinks: false),
+            completion(equals(["dir/link"])));
+      });
+
+      test("shouldn't crash on broken symlinks", () {
+        schedule(() {
+          return new Directory(p.join(sandbox, "foo")).delete(recursive: true);
+        });
+
+        expect(list("dir/**"), completion(equals(["dir/link"])));
+      });
+    });
+
+    test("always lists recursively with recursive: true", () {
+      expect(list("foo", recursive: true), completion(unorderedEquals(
+          ["foo", "foo/bar", "foo/baz", "foo/baz/qux", "foo/baz/bang"])));
+    });
+
+    test("doesn't crash on non-existent directories", () {
+      expect(list("non/existent/**"), completion(isEmpty));
+    });
+
+    test("lists an absolute glob", () {
+      expect(schedule(() {
+        var pattern = separatorToForwardSlash(
+            p.absolute(p.join(sandbox, 'foo/baz/**')));
+
+        return list(pattern);
+      }), completion(unorderedEquals(["foo/baz/bang", "foo/baz/qux"])));
+    });
+  });
+}
+
+typedef Future<List<String>> ListFn(String glob,
+    {bool recursive, bool followLinks});
+
+/// Runs [callback] in two groups with two values of [listFn]: one that uses
+/// [Glob.list], one that uses [Glob.listSync].
+void syncAndAsync(callback(ListFn listFn)) {
+  group("async", () {
+    callback((glob, {recursive: false, followLinks: true}) {
+      return schedule(() {
+        return new Glob(glob, recursive: recursive)
+            .list(root: sandbox, followLinks: followLinks)
+            .map((entity) {
+          return separatorToForwardSlash(
+              p.relative(entity.path, from: sandbox));
+        }).toList();
+      }, 'listing $glob');
+    });
+  });
+
+  group("sync", () {
+    callback((glob, {recursive: false, followLinks: true}) {
+      return schedule(() {
+        return new Glob(glob, recursive: recursive)
+            .listSync(root: sandbox, followLinks: followLinks)
+            .map((entity) {
+          return separatorToForwardSlash(
+              p.relative(entity.path, from: sandbox));
+        }).toList();
+      }, 'listing $glob');
+    });
+  });
+}
+
+void scheduleSandbox() {
+  schedule(() {
+    return Directory.systemTemp.createTemp('glob_').then((dir) {
+      sandbox = dir.path;
+      d.defaultRoot = sandbox;
+    });
+  }, 'creating sandbox');
+
+  currentSchedule.onComplete.schedule(() {
+    d.defaultRoot = null;
+    if (sandbox == null) return null;
+    var oldSandbox = sandbox;
+    sandbox = null;
+    return new Directory(oldSandbox).delete(recursive: true);
+  });
+}