Add a caseSensitive flag to new Glob().

test/glob_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 'package:glob/glob.dart';
 import 'package:test/test.dart';
 
 void main() {
   group("Glob.quote()", () {
     test("quotes all active characters", () {
@@ skipping 73 matching lines @@
       expect(match.groups([0]), equals(["foobar"]));
     });
 
     test("throws a range error for an invalid group", () {
       expect(() => match[1], throwsRangeError);
       expect(() => match[-1], throwsRangeError);
       expect(() => match.group(1), throwsRangeError);
       expect(() => match.groups([1]), throwsRangeError);
     });
   });
+
+  test("globs are case-sensitive by default for Posix and URL contexts", () {
+    expect("foo", contains(new Glob("foo", context: p.posix)));
+    expect("FOO", isNot(contains(new Glob("foo", context: p.posix))));
+    expect("foo", isNot(contains(new Glob("FOO", context: p.posix))));
+
+    expect("foo", contains(new Glob("foo", context: p.url)));
+    expect("FOO", isNot(contains(new Glob("foo", context: p.url))));
+    expect("foo", isNot(contains(new Glob("FOO", context: p.url))));
+  });
+
+  test("globs are case-insensitive by default for Windows contexts", () {
+    expect("foo", contains(new Glob("foo", context: p.windows)));
+    expect("FOO", contains(new Glob("foo", context: p.windows)));
+    expect("foo", contains(new Glob("FOO", context: p.windows)));
+  });
 }