public void TestOptionGroup()
{
Assert.AreEqual(new OptionsGroupPattern().Expression, "");
var op = new OptionsGroupPattern().IgnoreCase().Multiline(false);
Assert.AreEqual(op.Expression, "(?i-m)");
op = new OptionsGroupPattern().SetAll(true);
Assert.AreEqual(op.Expression, "(?imnsx)");
op = new OptionsGroupPattern("").SetAll(false);
Assert.AreEqual(op.Expression, "(?-imnsx)");
op = new OptionsGroupPattern("abc");
Assert.AreEqual(op.Expression, "(abc)");
op = new OptionsGroupPattern("abc").ExplicitCapture(false).SingleLine();
Assert.AreEqual(op.Expression, "(?s-n:abc)");
op = new OptionsGroupPattern("abc").SetAll(true);
Assert.AreEqual(op.Expression, "(?imnsx:abc)");
op = new OptionsGroupPattern("abc").SetAll(false);
Assert.AreEqual(op.Expression, "(?-imnsx:abc)");
}
public void TestStatics()
{
ut.Assert.AreEqual(Text("abc", ".txt").Expression, @"abc\.txt");
ut.Assert.AreEqual(Text("abc", ".txt")[1].Expression, @"(?:abc\.txt){1}");
ut.Assert.AreEqual(Group("abc", ".txt").Expression, @"(abc\.txt)");
ut.Assert.AreEqual(NamedGroup("group1", "abc", ".txt").AtLeast(3).Expression, @"(?'group1'abc\.txt){3,}");
ut.Assert.AreEqual(CaptureGroup("group1", "abc", ".txt").NoneOrOnce(RepeatMode.Lazy).Expression, @"(?'group1'abc\.txt)??");
var g = NamedGroup("group1", NewLine.OnceOrMore());
ut.Assert.AreEqual((g + BackRef("group1")).Expression, @"(?'group1'(?:\n|\r\n)+)\k'group1'");
ut.Assert.AreEqual((g + BackRef(1)).Expression, @"(?'group1'(?:\n|\r\n)+)\1");
ut.Assert.AreEqual(AtomicGroup("abc", ".txt").NoneOrMany().Expression, @"(?>abc\.txt)*");
ut.Assert.AreEqual(Greedy("abc", ".txt").Maybe().Expression, @"(?>abc\.txt)?");
ut.Assert.AreEqual(NonBacktracking("abc", ".txt").OnceOrMore().Expression, @"(?>abc\.txt)+");
ut.Assert.AreEqual(NoBacktrack("abc", ".txt").Expression, @"(?>abc\.txt)");
ut.Assert.AreEqual(NonCapturingGroup("abc", ".txt").Expression, @"(?:abc\.txt)");
ut.Assert.AreEqual(Enclose("abc", ".txt")[1].Expression, @"(?:abc\.txt){1}");
ut.Assert.AreEqual(BalancingGroup("group1", "abc.txt").Expression, @"(?'-group1'abc\.txt)");
ut.Assert.AreEqual(BalancingGroup("group1", "group2", "abc.txt").Expression, @"(?'group2-group1'abc\.txt)");
ut.Assert.AreEqual(LookAhead("abc")[2, 7].Expression, "(?=abc)");
ut.Assert.AreEqual(NegativeLookAhead("abc", "efg").Expression, "(?!abcefg)");
ut.Assert.AreEqual(LookBehind("abc".Repeat(5)).Expression, "(?<=(?:abc){5})");
ut.Assert.AreEqual(NegativeLookBehind("abc".AsItIs() + "d" | "f").Expression, "(?<!abcd|f)");
ut.Assert.AreEqual(AssertNextIs("abc").Expression, "(?=abc)");
ut.Assert.AreEqual(AssertNextIsNot("abc", "efg")[2, 7].Expression, "(?!abcefg)");
ut.Assert.AreEqual(AssertPreviousIs("abc".Repeat(5)).Expression, "(?<=(?:abc){5})");
ut.Assert.AreEqual(AssertPreviousIsNot("abc".AsItIs() + "d" | "f").Expression, "(?<!abcd|f)");
var p = "q" + AssertNextIs("u" + Group(AnyChar)) +
AnyChar.Repeat(3) + BackRef(1);
ut.Assert.AreEqual(p.Expression, @"q(?=u(.)).{3}\1");
p = "qu" + Group(AnyChar) + AnyChar + BackRef(1);
ut.Assert.AreEqual(p.Expression, @"qu(.).\1");
p = "qu" + Group(AnyChar) + AnyChar + AssertNextIs(BackRef(1));
ut.Assert.AreEqual(p.Expression, @"qu(.).(?=\1)");
ut.Assert.AreEqual(Intersection(Unicode.Arabic, Unicode.Letter).Expression, @"(?=\p{IsArabic})\p{L}");
ut.Assert.AreEqual(Difference(Unicode.Letter, Unicode.Arabic).Expression, @"(?!\p{IsArabic})\p{L}");
var ag = IfExists("group1").ThenMatch("abc");
ut.Assert.AreEqual(ag.Expression, "(?(group1)abc)");
ag = ag.ElseMatch("x");
ut.Assert.AreEqual(ag.Expression, "(?(group1)abc|x)");
ag = Check(1).YesPattern("abc");
ut.Assert.AreEqual(ag.Expression, "(?(1)abc)");
ag = ag.NoPattern("x");
ut.Assert.AreEqual(ag.Expression, "(?(1)abc|x)");
ag = Assert(StartOfText).YesPattern("abc");
ut.Assert.AreEqual(ag.Expression, @"(?(\A)abc)");
ag = ag.NoPattern("x");
ut.Assert.AreEqual(ag[2, 3].Expression, @"(?(\A)abc|x){2,3}");
ut.Assert.AreEqual(OptionsGroup()[1].Expression, "");
var op = new OptionsGroupPattern().IgnoreCase().Multiline(false);
ut.Assert.AreEqual(op.Expression, "(?i-m)");
p = OptionsGroup().SetAll(true).OnceOrMore();
ut.Assert.AreEqual(p.Expression, "(?imnsx)");
op = Options.SetAll(false);
ut.Assert.AreEqual(op.Expression, "(?-imnsx)");
op = Options.SetAll(null);
ut.Assert.AreEqual(op.Expression, "");
p = OptionsGroup("abc")[2, 3];
ut.Assert.AreEqual(p.Expression, "(abc)");
ut.Assert.AreEqual(Comment("Test").Expression, @"(?#Test)");
var LineComments = WithLineComments(
("abc", "string"),
(Unicode.Arabic, "Arabic letter"))[2];