<?php
// empty group
test('/()/',
R::expression()->group(R::group())
);
// named group
test('/(?P<protocol>)/',
R::expression()->group(R::group('protocol'))
);
// some quantifier: one or more
test('/(very)+/',
R::expression()->group(
R::group()->oneOrMore()->text('very')
)
);
// dot
test('/(.)/',
R::expression()->group(R::group()->char(R::anyChar()))
);
// or
test('/(master|maestro|mister)/',
R::expression()->group(R::group()->oneOfThese()->text('master')->text('maestro')->text('mister'))
);
test('/(master|maestro|mister)/',
R::expression()->raw('(master|maestro|mister)')
);
// quantifier: optional
test('/(nom)?/',
R::expression()->group(R::group()->optional()->text('nom'))
);
// wordBoundary
test ('/(\b)/',
R::expression()->group(R::group()->wordBoundary())
);
// anythingButWordBoundary
test ('/(\B)/',
R::expression()->group(R::group()->anythingButWordBoundary())
);
// dontCapture
test ('/(?:abc)/',
R::expression()->group(R::group()->dontCapture()->text('abc'))
);
// startOfLine
test('/(^)/',
R::expression()->group(R::group()->startOfLine())
);
// endOfLine
test('/($)/',
R::expression()->group(R::group()->endOfLine())
);
// backReference
test('/(abc) \1/',
R::expression()
->group(R::group()->text('abc'))
->text(' ')
->backReference(1)
);
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