Fix case-insensitive absolute listing.

test/list_test.dart

Index: test/list_test.dart
diff --git a/test/list_test.dart b/test/list_test.dart
index 948af08064c3ed1727796cef4a9e8102697fd9f7..d59e273d0240a3d3cbb0755573a9a5480b0435a7 100644
--- a/test/list_test.dart
+++ b/test/list_test.dart
@@ -275,6 +275,19 @@ void main() {
       ])));
     });
 
+    // Regression test for #4.
+    test("lists an absolute case-insensitive glob", () {
+      expect(schedule(() {
+        var pattern = separatorToForwardSlash(
+            p.absolute(p.join(sandbox, 'foo/Baz/**')));
+
+        return list(pattern, caseSensitive: false);
+      }), completion(unorderedEquals([
+        p.join("foo", "baz", "bang"),
+        p.join("foo", "baz", "qux")
+      ])));
+    });
+
     test("lists a subdirectory that sometimes exists", () {
       d.dir("top", [
         d.dir("dir1", [