Ilya Gorbunov
8d0d6d1bf3
Instead of mutating the matcher create a new one when `next()` is called. This allows getting named groups from that matcher later. Add lookbehind in matchSequence test to ensure this change doesn't alter the existing behavior. Also fixes #KT-20865
49 lines
1.6 KiB
Kotlin
49 lines
1.6 KiB
Kotlin
/*
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* Copyright 2010-2017 JetBrains s.r.o.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package kotlin.text.test
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import org.junit.Test
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import kotlin.test.*
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class RegexTest {
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@Test fun namedGroups() {
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val input = "1a 2b 3"
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val regex = "(?<num>\\d)(?<liter>\\w)?".toRegex()
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val matches = regex.findAll(input).toList()
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assertTrue(matches.all { it.groups.size == 3 })
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val (m1, m2, m3) = matches
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assertEquals("1", m1.groups["num"]?.value)
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assertEquals(0..0, m1.groups["num"]?.range)
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assertEquals("a", m1.groups["liter"]?.value)
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assertEquals(1..1, m1.groups["liter"]?.range)
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assertEquals("2", m2.groups["num"]?.value)
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assertEquals(3..3, m2.groups["num"]?.range)
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assertEquals("b", m2.groups["liter"]?.value)
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assertEquals(4..4, m2.groups["liter"]?.range)
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assertEquals("3", m3.groups["num"]?.value)
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assertNull(m3.groups["liter"])
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assertFailsWith<IllegalArgumentException> { m2.groups["unknown_group"] }.let { e ->
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assertTrue("unknown_group" in e.message!!)
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}
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}
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}
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