kotlin-fork/libraries/stdlib/test/text/StringTest.kt

package test.text

import kotlin.test.*
import org.junit.Test as test

class StringTest {

    test fun startsWith() {
        assertTrue("abcd".startsWith("ab"))
        assertTrue("abcd".startsWith("abcd"))
        assertTrue("abcd".startsWith("a"))
        assertFalse("abcd".startsWith("abcde"))
        assertFalse("abcd".startsWith("b"))
        assertFalse("".startsWith('a'))
    }

    test fun endsWith() {
        assertTrue("abcd".endsWith("d"))
        assertTrue("abcd".endsWith("abcd"))
        assertFalse("abcd".endsWith("b"))
        assertFalse("".endsWith('a'))
    }

    test fun testStartsWithChar() {
        assertTrue("abcd".startsWith('a'))
        assertFalse("abcd".startsWith('b'))
        assertFalse("".startsWith('a'))
    }

    test fun testEndsWithChar() {
        assertTrue("abcd".endsWith('d'))
        assertFalse("abcd".endsWith('b'))
        assertFalse("".endsWith('a'))
    }

    test fun capitalize() {
        assertEquals("A", "A".capitalize())
        assertEquals("A", "a".capitalize())
        assertEquals("Abcd", "abcd".capitalize())
        assertEquals("Abcd", "Abcd".capitalize())
    }

    test fun decapitalize() {
        assertEquals("a", "A".decapitalize())
        assertEquals("a", "a".decapitalize())
        assertEquals("abcd", "abcd".decapitalize())
        assertEquals("abcd", "Abcd".decapitalize())
        assertEquals("uRL", "URL".decapitalize())
    }

    test fun slice() {
        val iter = listOf(4, 3, 0, 1)
        // abcde
        // 01234
        assertEquals("bcd", "abcde".substring(1..3))
        assertEquals("dcb", "abcde".slice(3 downTo 1))
        assertEquals("edab", "abcde".slice(iter))
    }

    test fun reverse() {
        assertEquals("dcba", "abcd".reverse())
        assertEquals("4321", "1234".reverse())
        assertEquals("", "".reverse())
    }
}