Bug cleanup: unify on allowing radices from 2 to 36 in

tests/corelib/integer_to_radix_string_test.dart

Index: tests/corelib/integer_to_radix_string_test.dart
diff --git a/tests/corelib/integer_to_radix_string_test.dart b/tests/corelib/integer_to_radix_string_test.dart
index 35454bfde973d7ce67e3dd6e879076792c5e7f8c..24343931f7c8c1193cb4686c8b7cb5b90c7fed5e 100644
--- a/tests/corelib/integer_to_radix_string_test.dart
+++ b/tests/corelib/integer_to_radix_string_test.dart
@@ -3,6 +3,25 @@
 // BSD-style license that can be found in the LICENSE file.
 
 main() {
-  // Just make sure that we use lower-case characters.
-  Expect.equals("abcd", (0xabcd).toRadixString(16));
-} 
+  // Test that we accept radix 2 to 36 and that we use lower-case
+  // letters.
+  var expected = ['0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
+                  'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j',
+                  'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't',
+                  'u', 'v', 'w', 'x', 'y', 'z'];
+  for (var radix = 2; radix < 37; radix++) {
+    for (var i = 0; i < radix; i++) {
+      Expect.equals(expected[i], i.toRadixString(radix));
+    }
+  }
+
+  var illegalRadices = [ -1, 0, 1, 37 ];
+  for (var radix in illegalRadices) {
+    try {
+      42.toRadixString(radix);
+      Expect.fail("Exception expected");
+    } on IllegalArgumentException catch (e) {
+      // Nothing to do.
+    }
+  }
+}