libraries/stdlib/test/text/RegexJVMTest.kt

/*
 * Copyright 2010-2017 JetBrains s.r.o.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

@file:kotlin.jvm.JvmVersion
package test.text

import kotlin.test.*
import test.collections.compare
import test.io.*
import java.util.regex.Pattern


class RegexJVMTest {

    @Test fun matchGroups() {
        val input = "1a 2b 3c"
        val regex = "(\\d)(\\w)".toRegex()

        val matches = regex.findAll(input).toList()
        assertTrue(matches.all { it.groups.size == 3 })
        val m1 = matches[0]
        assertEquals("1a", m1.groups[0]?.value)
        assertEquals(0..1, m1.groups[0]?.range)
        assertEquals("1", m1.groups[1]?.value)
        assertEquals(0..0, m1.groups[1]?.range)
        assertEquals("a", m1.groups[2]?.value)
        assertEquals(1..1, m1.groups[2]?.range)

        val m2 = matches[1]
        assertEquals("2", m2.groups[1]?.value)
        assertEquals(3..3, m2.groups[1]?.range)
        assertEquals("b", m2.groups[2]?.value)
        assertEquals(4..4, m2.groups[2]?.range)
    }


    private fun compareRegex(expected: Regex, actual: Regex) = compare(expected, actual) {
        propertyEquals(Regex::pattern)
        propertyEquals(Regex::options)
        propertyEquals("flags") { toPattern().flags() }
    }

    private fun equivalentAfterDeserialization(regex: Regex) = compareRegex(regex, serializeAndDeserialize(regex))

    @Test fun serializeDeserializeRegex() {
        equivalentAfterDeserialization(Regex(""))
        equivalentAfterDeserialization(Regex("\\w+"))
        equivalentAfterDeserialization(Regex("\\w+", RegexOption.IGNORE_CASE))
        equivalentAfterDeserialization(Regex("\\w+", setOf(RegexOption.LITERAL, RegexOption.MULTILINE)))
        equivalentAfterDeserialization(Pattern.compile("\\w+", Pattern.UNICODE_CASE).toRegex())
    }

    @Test fun deserializeRegexFromHex() {
        val expected = Regex("\\w+", RegexOption.IGNORE_CASE)
        // println(serializeToHex(expected))
        val deserialized = deserializeFromHex<Regex>("ac ed 00 05 73 72 00 1c 6b 6f 74 6c 69 6e 2e 74 65 78 74 2e 52 65 67 65 78 24 53 65 72 69 61 6c 69 7a 65 64 00 00 00 00 00 00 00 00 02 00 02 49 00 05 66 6c 61 67 73 4c 00 07 70 61 74 74 65 72 6e 74 00 12 4c 6a 61 76 61 2f 6c 61 6e 67 2f 53 74 72 69 6e 67 3b 78 70 00 00 00 42 74 00 03 5c 77 2b")
        compareRegex(expected, deserialized)
    }
}