regex_test.v

module pcre

fn test_match_after() {
	r := new_regex('Match everything after this: (.+)', 0) or { panic('An error occured!') }

	m := r.match_str('Match everything after this: "I <3 VLang!"', 0, 0) or { panic('No match!') }

	// m.get(0) -> Match everything after this: "I <3 VLang!"
	// m.get(1) -> "I <3 VLang!"
	// m.get(2) -> Error!
	whole_match := m.get(0) or { panic('We matched nothing...') }

	matched_str := m.get(1) or { panic('We matched nothing...') }

	assert whole_match == 'Match everything after this: "I <3 VLang!"'
	assert matched_str == '"I <3 VLang!"'

	r.free()
}

fn test_match_str_iterator() {
	mut re := new_regex(r'(.)', 0)! // match each of the letters
	matches := re.match_str('abcdef', 0, 0)!
	mut out := []string{}
	for m in matches {
		out << m.get(0)!
		assert m.get_all().len == 1
	}
	assert out == ['a', 'b', 'c', 'd', 'e', 'f']
}

fn test_match_possible_zero_length() {
	mut re := pcre.new_regex(r'(.)*', 0) or { panic(err) }
	m := re.match_str('Vlang', 0, 0) or { panic(err) }
	assert m.get_all() == ['g']
}