Migrate test block 3 to Dart 2.0.

tests/corelib/bit_twiddling_test.dart

Index: tests/corelib/bit_twiddling_test.dart
diff --git a/tests/corelib/bit_twiddling_test.dart b/tests/corelib/bit_twiddling_test.dart
deleted file mode 100644
index b78d85e5251473de4da7c178c363cc1e35c4c3b2..0000000000000000000000000000000000000000
--- a/tests/corelib/bit_twiddling_test.dart
+++ /dev/null
@@ -1,173 +0,0 @@
-// Copyright (c) 2013, 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.
-// Testing Bigints.
-
-library bit_twiddling_test;
-
-import "package:expect/expect.dart";
-
-bool haveBigints() {
-  return 100000000000000000000 + 1 != 100000000000000000000;
-}
-
-testBitLength() {
-  check(int i, width) {
-    Expect.equals(width, i.bitLength, '$i.bitLength ==  $width');
-    // (~i) written as (-i-1) to avoid issues with limited range of dart2js ops.
-    Expect.equals(width, (-i - 1).bitLength, '(~$i).bitLength == $width');
-  }
-
-  check(0, 0);
-  check(1, 1);
-  check(2, 2);
-  check(3, 2);
-  check(4, 3);
-  check(5, 3);
-  check(6, 3);
-  check(7, 3);
-  check(8, 4);
-  check(127, 7);
-  check(128, 8);
-  check(129, 8);
-  check(2147483646, 31);
-  check(2147483647, 31);
-  check(2147483648, 32);
-  check(2147483649, 32);
-  check(4294967295, 32);
-  check(4294967296, 33);
-  check(0xffffffffff, 40);
-  check(0xfffffffffff, 44);
-  check(0xffffffffffff, 48);
-  check(0x1000000000000, 49);
-  check(0x1000000000001, 49);
-  check(0x1ffffffffffff, 49);
-  check(0x2000000000000, 50);
-  check(0x2000000000001, 50);
-
-  if (haveBigints()) {
-    check(0xffffffffffffff, 56);
-    check(0xffffffffffffffff, 64);
-    check(0xffffffffffffffffff, 72);
-    check(0x1000000000000000000, 73);
-    check(0x1000000000000000001, 73);
-
-    check(0xfffffffffffffffffffffffffffffffffffffe, 152);
-    check(0xffffffffffffffffffffffffffffffffffffff, 152);
-    check(0x100000000000000000000000000000000000000, 153);
-    check(0x100000000000000000000000000000000000001, 153);
-  }
-}
-
-testToUnsigned() {
-  checkU(src, width, expected) {
-    Expect.equals(expected, src.toUnsigned(width));
-  }
-
-  checkU(1, 8, 1);
-  checkU(0xff, 8, 0xff);
-  checkU(0xffff, 8, 0xff);
-  checkU(-1, 8, 0xff);
-  checkU(0xffffffff, 32, 0xffffffff);
-
-  checkU(0x7fffffff, 30, 0x3fffffff);
-  checkU(0x7fffffff, 31, 0x7fffffff);
-  checkU(0x7fffffff, 32, 0x7fffffff);
-  checkU(0x80000000, 30, 0);
-  checkU(0x80000000, 31, 0);
-  checkU(0x80000000, 32, 0x80000000);
-  checkU(0xffffffff, 30, 0x3fffffff);
-  checkU(0xffffffff, 31, 0x7fffffff);
-  checkU(0xffffffff, 32, 0xffffffff);
-  checkU(0x100000000, 30, 0);
-  checkU(0x100000000, 31, 0);
-  checkU(0x100000000, 32, 0);
-  checkU(0x1ffffffff, 30, 0x3fffffff);
-  checkU(0x1ffffffff, 31, 0x7fffffff);
-  checkU(0x1ffffffff, 32, 0xffffffff);
-
-  checkU(-1, 0, 0);
-  checkU(0, 0, 0);
-  checkU(1, 0, 0);
-  checkU(2, 0, 0);
-  checkU(3, 0, 0);
-
-  checkU(-1, 1, 1);
-  checkU(0, 1, 0);
-  checkU(1, 1, 1);
-  checkU(2, 1, 0);
-  checkU(3, 1, 1);
-  checkU(4, 1, 0);
-
-  checkU(-1, 2, 3);
-  checkU(0, 2, 0);
-  checkU(1, 2, 1);
-  checkU(2, 2, 2);
-  checkU(3, 2, 3);
-  checkU(4, 2, 0);
-
-  checkU(-1, 3, 7);
-  checkU(0, 3, 0);
-  checkU(1, 3, 1);
-  checkU(2, 3, 2);
-  checkU(3, 3, 3);
-  checkU(4, 3, 4);
-}
-
-testToSigned() {
-  checkS(src, width, expected) {
-    Expect.equals(
-        expected, src.toSigned(width), '$src.toSigned($width) == $expected');
-  }
-
-  checkS(1, 8, 1);
-  checkS(0xff, 8, -1);
-  checkS(0xffff, 8, -1);
-  checkS(-1, 8, -1);
-  checkS(128, 8, -128);
-  checkS(0xffffffff, 32, -1);
-
-  checkS(0x7fffffff, 30, -1);
-  checkS(0x7fffffff, 31, -1);
-  checkS(0x7fffffff, 32, 0x7fffffff);
-  checkS(0x80000000, 30, 0);
-  checkS(0x80000000, 31, 0);
-  checkS(0x80000000, 32, -2147483648);
-  checkS(0xffffffff, 30, -1);
-  checkS(0xffffffff, 31, -1);
-  checkS(0xffffffff, 32, -1);
-
-  checkS(0x100000000, 30, 0);
-  checkS(0x100000000, 31, 0);
-  checkS(0x100000000, 32, 0);
-  checkS(0x1ffffffff, 30, -1);
-  checkS(0x1ffffffff, 31, -1);
-  checkS(0x1ffffffff, 32, -1);
-
-  checkS(-1, 1, -1);
-  checkS(0, 1, 0);
-  checkS(1, 1, -1); // The only bit is the sign bit.
-  checkS(2, 1, 0);
-  checkS(3, 1, -1);
-  checkS(4, 1, 0);
-
-  checkS(-1, 2, -1);
-  checkS(0, 2, 0);
-  checkS(1, 2, 1);
-  checkS(2, 2, -2);
-  checkS(3, 2, -1);
-  checkS(4, 2, 0);
-
-  checkS(-1, 3, -1);
-  checkS(0, 3, 0);
-  checkS(1, 3, 1);
-  checkS(2, 3, 2);
-  checkS(3, 3, 3);
-  checkS(4, 3, -4);
-}
-
-main() {
-  testBitLength();
-  testToUnsigned();
-  testToSigned();
-}