package com.keylesspalace.tusky

import com.keylesspalace.tusky.util.dec
import com.keylesspalace.tusky.util.inc
import com.keylesspalace.tusky.util.isLessThan
import org.junit.Assert.assertEquals
import org.junit.Assert.assertFalse
import org.junit.Assert.assertTrue
import org.junit.Test

class StringUtilsTest {
    @Test
    fun isLessThan() {
        val lessList = listOf(
            "abc" to "bcd",
            "ab" to "abc",
            "cb" to "abc",
            "1" to "2"
        )
        lessList.forEach { (l, r) -> assertTrue("$l < $r", l.isLessThan(r)) }
        val notLessList = lessList.map { (l, r) -> r to l } + listOf(
            "abc" to "abc"
        )
        notLessList.forEach { (l, r) -> assertFalse("not $l < $r", l.isLessThan(r)) }
    }

    @Test
    fun inc() {
        listOf(
            "122" to "123",
            "12A" to "12B",
            "1" to "2"
        ).forEach { (l, r) -> assertEquals("$l + 1 = $r", r, l.inc()) }
    }

    @Test
    fun dec() {
        listOf(
            "123" to "122",
            "12B" to "12A",
            "120" to "11z",
            "100" to "zz",
            "0" to "",
            "" to "",
            "2" to "1"
        ).forEach { (l, r) -> assertEquals("$l - 1 = $r", r, l.dec()) }
    }
}