Check in codegen test expectations.

test/codegen/expect/language/reg_exp_test.js

+dart_library.library('language/reg_exp_test', null, /* Imports */[
+  'dart_sdk',
+  'expect'
+], function load__reg_exp_test(exports, dart_sdk, expect) {
+  'use strict';
+  const core = dart_sdk.core;
+  const _interceptors = dart_sdk._interceptors;
+  const dart = dart_sdk.dart;
+  const dartx = dart_sdk.dartx;
+  const expect$ = expect.expect;
+  const reg_exp_test = Object.create(null);
+  let JSArrayOfString = () => (JSArrayOfString = dart.constFn(_interceptors.JSArray$(core.String)))();
+  let IterableOfMatch = () => (IterableOfMatch = dart.constFn(core.Iterable$(core.Match)))();
+  let MatchToString = () => (MatchToString = dart.constFn(dart.definiteFunctionType(core.String, [core.Match])))();
+  let VoidToIterableOfMatch = () => (VoidToIterableOfMatch = dart.constFn(dart.definiteFunctionType(IterableOfMatch(), [])))();
+  let VoidToMatch = () => (VoidToMatch = dart.constFn(dart.definiteFunctionType(core.Match, [])))();
+  let VoidTovoid = () => (VoidTovoid = dart.constFn(dart.definiteFunctionType(dart.void, [])))();
+  reg_exp_test.main = function() {
+    let exp = core.RegExp.new("(\\w+)");
+    let str = "Parse my string";
+    let matches = exp.allMatches(str)[dartx.toList]();
+    expect$.Expect.equals(3, matches[dartx.length]);
+    expect$.Expect.equals("Parse", matches[dartx.get](0).group(0));
+    expect$.Expect.equals("my", matches[dartx.get](1).group(0));
+    expect$.Expect.equals("string", matches[dartx.get](2).group(0));
+    exp = core.RegExp.new("a?");
+    str = "babba";
+    expect$.Expect.listEquals(JSArrayOfString().of(["", "a", "", "", "a", ""]), exp.allMatches(str)[dartx.map](core.String)(dart.fn(x => x.get(0), MatchToString()))[dartx.toList]());
+    exp = core.RegExp.new("as{2}");
+    str = "assassin";
+    expect$.Expect.equals(2, exp.allMatches(str)[dartx.length]);
+    expect$.Expect.equals(2, exp.allMatches(str, 0)[dartx.length]);
+    expect$.Expect.equals(1, exp.allMatches(str, 1)[dartx.length]);
+    expect$.Expect.equals(0, exp.allMatches(str, 4)[dartx.length]);
+    expect$.Expect.equals(0, exp.allMatches(str, str[dartx.length])[dartx.length]);
+    expect$.Expect.throws(dart.fn(() => exp.allMatches(str, -1), VoidToIterableOfMatch()));
+    expect$.Expect.throws(dart.fn(() => exp.allMatches(str, dart.notNull(str[dartx.length]) + 1), VoidToIterableOfMatch()));
+    exp = core.RegExp.new(".*");
+    expect$.Expect.equals("", exp.allMatches(str, str[dartx.length])[dartx.single].get(0));
+    exp = core.RegExp.new("^ass");
+    expect$.Expect.equals(1, exp.allMatches(str, 0)[dartx.length]);
+    expect$.Expect.equals(0, exp.allMatches(str, 3)[dartx.length]);
+    exp = core.RegExp.new("^", {multiLine: true});
+    str = "foo\nbar\nbaz";
+    expect$.Expect.equals(" foo\n bar\n baz", str[dartx.replaceAll](exp, " "));
+    exp = core.RegExp.new("(\\w+)");
+    expect$.Expect.isNull(exp.matchAsPrefix(" xyz ab"));
+    expect$.Expect.isNull(exp.matchAsPrefix(" xyz ab", 0));
+    let m = exp.matchAsPrefix(" xyz ab", 1);
+    expect$.Expect.equals("xyz", m.get(0));
+    expect$.Expect.equals("xyz", m.get(1));
+    expect$.Expect.equals(1, m.groupCount);
+    m = exp.matchAsPrefix(" xyz ab", 2);
+    expect$.Expect.equals("yz", m.get(0));
+    expect$.Expect.equals("yz", m.get(1));
+    expect$.Expect.equals(1, m.groupCount);
+    m = exp.matchAsPrefix(" xyz ab", 3);
+    expect$.Expect.equals("z", m.get(0));
+    expect$.Expect.equals("z", m.get(1));
+    expect$.Expect.equals(1, m.groupCount);
+    expect$.Expect.isNull(exp.matchAsPrefix(" xyz ab", 4));
+    m = exp.matchAsPrefix(" xyz ab", 5);
+    expect$.Expect.equals("ab", m.get(0));
+    expect$.Expect.equals("ab", m.get(1));
+    expect$.Expect.equals(1, m.groupCount);
+    m = exp.matchAsPrefix(" xyz ab", 6);
+    expect$.Expect.equals("b", m.get(0));
+    expect$.Expect.equals("b", m.get(1));
+    expect$.Expect.equals(1, m.groupCount);
+    expect$.Expect.isNull(exp.matchAsPrefix(" xyz ab", 7));
+    expect$.Expect.throws(dart.fn(() => exp.matchAsPrefix(" xyz ab", -1), VoidToMatch()));
+    expect$.Expect.throws(dart.fn(() => exp.matchAsPrefix(" xyz ab", 8), VoidToMatch()));
+  };
+  dart.fn(reg_exp_test.main, VoidTovoid());
+  // Exports:
+  exports.reg_exp_test = reg_exp_test;
+});