Migrated test block 28 to Dart 2.0.

tests/corelib_2/string_replace_test.dart

 // Copyright (c) 2011, 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:expect/expect.dart";
 
 main() {
   // Test replaceFirst.
   Expect.equals("AtoBtoCDtoE", "AfromBtoCDtoE".replaceFirst("from", "to"));
 
@@ skipping 60 matching lines @@
       () => "hello".replaceFirst("h", "X", -1), (e) => e is RangeError);
 
   // Test startIndex too large
   Expect.throws(
       () => "hello".replaceFirst("h", "X", 6), (e) => e is RangeError);
 
   // Test null startIndex
   Expect.throws(
       () => "hello".replaceFirst("h", "X", null), (e) => e is ArgumentError);
 
-  // Test object startIndex
-  Expect.throws(() => "hello".replaceFirst("h", "X", new Object()));
-
   // Test replaceFirstMapped.
-
   Expect.equals(
       "AtoBtoCDtoE", "AfromBtoCDtoE".replaceFirstMapped("from", (_) => "to"));
 
   // Test with the replaced string at the beginning.
   Expect.equals(
       "toABtoCDtoE", "fromABtoCDtoE".replaceFirstMapped("from", (_) => "to"));
 
   // Test with the replaced string at the end.
   Expect.equals("toABtoCDtoEto",
       "fromABtoCDtoEto".replaceFirstMapped("from", (_) => "to"));
@@ skipping 57 matching lines @@
       (e) => e is RangeError);
 
   // Test startIndex too large
   Expect.throws(() => "hello".replaceFirstMapped("h", (_) => "X", 6),
       (e) => e is RangeError);
 
   // Test null startIndex
   Expect.throws(() => "hello".replaceFirstMapped("h", (_) => "X", null),
       (e) => e is ArgumentError);
 
-  // Test object startIndex
-  Expect
-      .throws(() => "hello".replaceFirstMapped("h", (_) => "X", new Object()));
-
   // Test replacement depending on argument.
   Expect.equals("foo-BAR-foo-bar",
       "foo-bar-foo-bar".replaceFirstMapped("bar", (v) => v[0].toUpperCase()));
 
   Expect.equals("foo-[bar]-foo-bar",
       "foo-bar-foo-bar".replaceFirstMapped("bar", (v) => "[${v[0]}]"));
 
   Expect.equals("foo-foo-bar-foo-bar-foo-bar",
       "foo-bar-foo-bar".replaceFirstMapped("bar", (v) => v.input));
 
   // Test replacement throwing.
   Expect.throws(() => "foo-bar".replaceFirstMapped("bar", (v) => throw 42),
       (e) => e == 42);
 
   // Test replacement returning non-String.
   var o = new Object();
   Expect.equals(
       "foo-$o",
       "foo-bar".replaceFirstMapped("bar", (v) {
         return o;
       }));
 
-  Expect.equals(
-      "foo-42",
-      "foo-bar".replaceFirstMapped("bar", (v) {
-        return 42;
-      }));
-
-  // Test replacement returning object throwing on string-conversion.
-  var n = new Naughty();
-  Expect.throws(() => "foo-bar".replaceFirstMapped("bar", (v) {
-        return n;
-      }));
-
   for (var string in ["", "x", "foo", "x\u2000z"]) {
     for (var replacement in ["", "foo", string]) {
       for (int start = 0; start <= string.length; start++) {
         var expect;
         for (int end = start; end <= string.length; end++) {
           expect =
               string.substring(0, start) + replacement + string.substring(end);
           Expect.equals(expect, string.replaceRange(start, end, replacement),
               '"$string"[$start:$end]="$replacement"');
         }
         // Reuse expect from "end == string.length" case when omitting end.
         Expect.equals(expect, string.replaceRange(start, null, replacement),
             '"$string"[$start:]="$replacement"');
       }
     }
     Expect.throws(() => string.replaceRange(0, 0, null));
-    Expect.throws(() => string.replaceRange(0, 0, 42));
-    Expect.throws(() => string.replaceRange(0, 0, ["x"]));
     Expect.throws(() => string.replaceRange(-1, 0, "x"));
     Expect.throws(() => string.replaceRange(0, string.length + 1, "x"));
   }
 }
-
-// Fails to return a String on toString, throws if converted by "$naughty".
-class Naughty {
-  toString() => this;
-}