tests/corelib/regexp/bol_test.dart

// Copyright (c) 2014, the Dart project authors. All rights reserved.
// Copyright 2013 the V8 project authors. All rights reserved.
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import 'v8_regexp_utils.dart';
import 'package:expect/expect.dart';

void main() {
  description('Test for beginning of line (BOL or ^) matching</a>');

  var s = "abc123def456xyzabc789abc999";
  shouldBeNull(firstMatch(s, new RegExp(r"^notHere")));
  shouldBe(firstMatch(s, new RegExp(r"^abc")), ["abc"]);
  shouldBe(firstMatch(s, new RegExp(r"(^|X)abc")), ["abc", ""]);
  shouldBe(firstMatch(s, new RegExp(r"^longer|123")), ["123"]);
  shouldBe(firstMatch(s, new RegExp(r"(^abc|c)123")), ["abc123", "abc"]);
  shouldBe(firstMatch(s, new RegExp(r"(c|^abc)123")), ["abc123", "abc"]);
  shouldBe(firstMatch(s, new RegExp(r"(^ab|abc)123")), ["abc123", "abc"]);
  shouldBe(firstMatch(s, new RegExp(r"(bc|^abc)([0-9]*)a")), [
    "bc789a",
    "bc",
    "789",
  ]);
  shouldBeNull(new RegExp(r"(?:(Y)X)|(X)").firstMatch("abc"));
  shouldBeNull(new RegExp(r"(?:(?:^|Y)X)|(X)").firstMatch("abc"));
  shouldBeNull(new RegExp(r"(?:(?:^|Y)X)|(X)").firstMatch("abcd"));
  shouldBe(new RegExp(r"(?:(?:^|Y)X)|(X)").firstMatch("Xabcd"), ["X", null]);
  shouldBe(new RegExp(r"(?:(?:^|Y)X)|(X)").firstMatch("aXbcd"), ["X", "X"]);
  shouldBe(new RegExp(r"(?:(?:^|Y)X)|(X)").firstMatch("abXcd"), ["X", "X"]);
  shouldBe(new RegExp(r"(?:(?:^|Y)X)|(X)").firstMatch("abcXd"), ["X", "X"]);
  shouldBe(new RegExp(r"(?:(?:^|Y)X)|(X)").firstMatch("abcdX"), ["X", "X"]);
  shouldBe(new RegExp(r"(?:(?:^|Y)X)|(X)").firstMatch("YXabcd"), ["YX", null]);
  shouldBe(new RegExp(r"(?:(?:^|Y)X)|(X)").firstMatch("aYXbcd"), ["YX", null]);
  shouldBe(new RegExp(r"(?:(?:^|Y)X)|(X)").firstMatch("abYXcd"), ["YX", null]);
  shouldBe(new RegExp(r"(?:(?:^|Y)X)|(X)").firstMatch("abcYXd"), ["YX", null]);
  shouldBe(new RegExp(r"(?:(?:^|Y)X)|(X)").firstMatch("abcdYX"), ["YX", null]);
}