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/*
* Copyright 2010-2018 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license
* that can be found in the license/LICENSE.txt file.
*/
@file:Suppress("NAMED_ARGUMENTS_NOT_ALLOWED") // for common tests
package test.text
import kotlin.test.*
class RegexTest {
@Test fun properties() {
val pattern = "\\s+$"
val regex1 = Regex(pattern, RegexOption.IGNORE_CASE)
assertEquals(pattern, regex1.pattern)
assertEquals(setOf(RegexOption.IGNORE_CASE), regex1.options)
val options2 = setOf(RegexOption.MULTILINE, RegexOption.IGNORE_CASE)
val regex2 = Regex(pattern, options2)
assertEquals(options2, regex2.options)
}
@Test fun matchResult() {
val p = "\\d+".toRegex()
val input = "123 456 789"
assertFalse(input matches p)
assertFalse(p matches input)
assertTrue(p in input)
val first = p.find(input)
assertTrue(first != null); first!!
assertEquals("123", first.value)
val second1 = first.next()!!
val second2 = first.next()!!
assertEquals("456", second1.value)
assertEquals(second1.value, second2.value)
assertEquals("56", p.find(input, startIndex = 5)?.value)
val last = second1.next()!!
assertEquals("789", last.value)
val noMatch = last.next()
assertEquals(null, noMatch)
}
@Test fun matchIgnoreCase() {
for (input in listOf("ascii", "shrödinger"))
assertTrue(input.toUpperCase().matches(input.toLowerCase().toRegex(RegexOption.IGNORE_CASE)))
}
@Test fun matchSequence() {
val input = "123 456 789"
val pattern = "\\d+".toRegex()
val matches = pattern.findAll(input)
val values = matches.map { it.value }
val expected = listOf("123", "456", "789")
assertEquals(expected, values.toList())
assertEquals(expected, values.toList(), "running match sequence second time")
assertEquals(expected.drop(1), pattern.findAll(input, startIndex = 3).map { it.value }.toList())
assertEquals(listOf(0..2, 4..6, 8..10), matches.map { it.range }.toList())
}
@Test fun matchAllSequence() {
val input = "test"
val pattern = ".*".toRegex()
val matches = pattern.findAll(input).toList()
assertEquals(input, matches[0].value)
assertEquals(input, matches.joinToString("") { it.value })
assertEquals(2, matches.size)
}
@Test fun matchGroups() {
val input = "1a 2b 3c"
val pattern = "(\\d)(\\w)".toRegex()
val matches = pattern.findAll(input).toList()
assertTrue(matches.all { it.groups.size == 3 })
matches[0].let { m ->
assertEquals("1a", m.groups[0]?.value)
assertEquals("1", m.groups[1]?.value)
assertEquals("a", m.groups[2]?.value)
assertEquals(listOf("1a", "1", "a"), m.groupValues)
val (g1, g2) = m.destructured
assertEquals("1", g1)
assertEquals("a", g2)
assertEquals(listOf("1", "a"), m.destructured.toList())
}
matches[1].let { m ->
assertEquals("2b", m.groups[0]?.value)
assertEquals("2", m.groups[1]?.value)
assertEquals("b", m.groups[2]?.value)
assertEquals(listOf("2b", "2", "b"), m.groupValues)
val (g1, g2) = m.destructured
assertEquals("2", g1)
assertEquals("b", g2)
assertEquals(listOf("2", "b"), m.destructured.toList())
}
}
@Test fun matchOptionalGroup() {
val pattern = "(hi)|(bye)".toRegex(RegexOption.IGNORE_CASE)
pattern.find("Hi!")!!.let { m ->
assertEquals(3, m.groups.size)
assertEquals("Hi", m.groups[1]?.value)
assertEquals(null, m.groups[2])
assertEquals(listOf("Hi", "Hi", ""), m.groupValues)
val (g1, g2) = m.destructured
assertEquals("Hi", g1)
assertEquals("", g2)
assertEquals(listOf("Hi", ""), m.destructured.toList())
}
pattern.find("bye...")!!.let { m ->
assertEquals(3, m.groups.size)
assertEquals(null, m.groups[1])
assertEquals("bye", m.groups[2]?.value)
assertEquals(listOf("bye", "", "bye"), m.groupValues)
val (g1, g2) = m.destructured
assertEquals("", g1)
assertEquals("bye", g2)
assertEquals(listOf("", "bye"), m.destructured.toList())
}
}
@Test fun matchMultiline() {
val regex = "^[a-z]*$".toRegex(setOf(RegexOption.IGNORE_CASE, RegexOption.MULTILINE))
val matchedValues = regex.findAll("test\n\nLine").map { it.value }.toList()
assertEquals(listOf("test", "", "Line"), matchedValues)
}
@Test fun matchEntire() {
val regex = "(\\d)(\\w)".toRegex()
assertNull(regex.matchEntire("1a 2b"))
assertNotNull(regex.matchEntire("3c")) { m ->
assertEquals("3c", m.value)
assertEquals(3, m.groups.size)
assertEquals(listOf("3c", "3", "c"), m.groups.map { it!!.value })
}
}
@Test fun matchEntireLazyQuantor() {
val regex = "a+b+?".toRegex()
val input = StringBuilder("aaaabbbb")
assertEquals("aaaab", regex.find(input)!!.value)
assertEquals("aaaabbbb", regex.matchEntire(input)!!.value)
}
@Test fun escapeLiteral() {
val literal = """[-\/\\^$*+?.()|[\]{}]"""
assertTrue(Regex.fromLiteral(literal).matches(literal))
assertTrue(Regex.escape(literal).toRegex().matches(literal))
}
@Test fun replace() {
val input = "123-456"
val pattern = "(\\d+)".toRegex()
assertEquals("(123)-(456)", pattern.replace(input, "($1)"))
assertEquals("$&-$&", pattern.replace(input, Regex.escapeReplacement("$&")))
assertEquals("X-456", pattern.replaceFirst(input, "X"))
}
@Test fun replaceEvaluator() {
val input = "/12/456/7890/"
val pattern = "\\d+".toRegex()
assertEquals("/2/3/4/", pattern.replace(input, { it.value.length.toString() }))
}
@Test fun split() {
val input = """
some ${"\t"} word
split
""".trim()
assertEquals(listOf("some", "word", "split"), "\\s+".toRegex().split(input))
assertEquals(listOf("name", "value=5"), "=".toRegex().split("name=value=5", limit = 2))
}
@Test fun splitByEmptyMatch() {
val input = "test"
val emptyMatch = "".toRegex()
assertEquals(input.split(""), input.split(emptyMatch))
assertEquals(input.split("", limit = 3), input.split(emptyMatch, limit = 3))
assertEquals("".split(""), "".split(emptyMatch))
val emptyMatchBeforeT = "(?=t)".toRegex()
assertEquals(listOf("", "tes", "t"), input.split(emptyMatchBeforeT))
assertEquals(listOf("", "test"), input.split(emptyMatchBeforeT, limit = 2))
assertEquals(listOf("", "tee"), "tee".split(emptyMatchBeforeT))
}
}
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