Evgeny Gerashchenko
56 lines
1.4 KiB
Kotlin
56 lines
1.4 KiB
Kotlin
package test.collections
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import kotlin.test.*
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import org.junit.Test
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class ListSpecificTest {
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val data = listOf("foo", "bar")
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val empty = listOf<String>()
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Test fun _toString() {
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assertEquals("[foo, bar]", data.toString())
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}
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Test fun tail() {
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val data = arrayListOf("foo", "bar", "whatnot")
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val actual = data.tail
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val expected = arrayListOf("bar", "whatnot")
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assertEquals(expected, actual)
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}
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Test fun slice() {
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val list = listOf('A', 'B', 'C', 'D')
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// ABCD
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// 0123
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assertEquals(listOf('B', 'C', 'D'), list.slice(1..3))
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assertEquals(listOf('D', 'C', 'B'), list.slice(3 downTo 1))
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val iter = listOf(2, 0, 3)
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assertEquals(listOf('C', 'A', 'D'), list.slice(iter))
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}
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Test fun utils() {
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assertNull(empty.head)
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assertNull(empty.first)
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assertNull(empty.last)
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assertEquals(-1, empty.lastIndex)
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assertEquals("foo", data.head)
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assertEquals("foo", data.first)
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assertEquals("bar", data.last)
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assertEquals(1, data.lastIndex)
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}
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Test fun mutableList() {
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val items = listOf("beverage", "location", "name")
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var list = listOf<String>()
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for (item in items) {
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list += item
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}
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assertEquals(3, list.size())
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assertEquals("beverage,location,name", list.join(","))
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}
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}
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