Add a caseSensitive flag to new Glob().

test/match_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:glob/src/utils.dart';
 import 'package:path/path.dart' as p;
 import 'package:test/test.dart';
 
 const RAW_ASCII_WITHOUT_SLASH = "\t\n\r !\"#\$%&'()*+`-.0123456789:;<=>?@ABCDEF"
@@ skipping 273 matching lines @@
         isNot(contains(new Glob("**", context: p.url))));
     expect(r"http://foo.com/bar",
         contains(new Glob("http://**", context: p.url)));
     expect(r"http://foo.com/bar",
         contains(new Glob("http://foo.com/**", context: p.url)));
 
     expect("/foo/bar", contains(new Glob("/foo/bar", context: p.url)));
     expect("/foo/bar", isNot(contains(new Glob("**", context: p.url))));
     expect("/foo/bar", contains(new Glob("/**", context: p.url)));
   });
+
+  group("when case-sensitive", () {
+    test("literals match case-sensitively", () {
+      expect("foo", contains(new Glob("foo", caseSensitive: true)));
+      expect("FOO", isNot(contains(new Glob("foo", caseSensitive: true))));
+      expect("foo", isNot(contains(new Glob("FOO", caseSensitive: true))));
+    });
+
+    test("ranges match case-sensitively", () {
+      expect("foo", contains(new Glob("[fx][a-z]o", caseSensitive: true)));
+      expect("FOO",
+          isNot(contains(new Glob("[fx][a-z]o", caseSensitive: true))));
+      expect("foo",
+          isNot(contains(new Glob("[FX][A-Z]O", caseSensitive: true))));
+    });
+
+    test("sequences preserve case-sensitivity", () {
+      expect("foo/bar", contains(new Glob("foo/bar", caseSensitive: true)));
+      expect("FOO/BAR",
+          isNot(contains(new Glob("foo/bar", caseSensitive: true))));
+      expect("foo/bar",
+          isNot(contains(new Glob("FOO/BAR", caseSensitive: true))));
+    });
+
+    test("options preserve case-sensitivity", () {
+      expect("foo", contains(new Glob("{foo,bar}", caseSensitive: true)));
+      expect("FOO",
+          isNot(contains(new Glob("{foo,bar}", caseSensitive: true))));
+      expect("foo",
+          isNot(contains(new Glob("{FOO,BAR}", caseSensitive: true))));
+    });
+  });
+
+  group("when case-insensitive", () {
+    test("literals match case-insensitively", () {
+      expect("foo", contains(new Glob("foo", caseSensitive: false)));
+      expect("FOO", contains(new Glob("foo", caseSensitive: false)));
+      expect("foo", contains(new Glob("FOO", caseSensitive: false)));
+    });
+
+    test("ranges match case-insensitively", () {
+      expect("foo", contains(new Glob("[fx][a-z]o", caseSensitive: false)));
+      expect("FOO", contains(new Glob("[fx][a-z]o", caseSensitive: false)));
+      expect("foo", contains(new Glob("[FX][A-Z]O", caseSensitive: false)));
+    });
+
+    test("sequences preserve case-insensitivity", () {
+      expect("foo/bar", contains(new Glob("foo/bar", caseSensitive: false)));
+      expect("FOO/BAR", contains(new Glob("foo/bar", caseSensitive: false)));
+      expect("foo/bar", contains(new Glob("FOO/BAR", caseSensitive: false)));
+    });
+
+    test("options preserve case-insensitivity", () {
+      expect("foo", contains(new Glob("{foo,bar}", caseSensitive: false)));
+      expect("FOO", contains(new Glob("{foo,bar}", caseSensitive: false)));
+      expect("foo", contains(new Glob("{FOO,BAR}", caseSensitive: false)));
+    });
+  });
 }