Ilya Ryzhenkov
63 lines
1.6 KiB
Kotlin
63 lines
1.6 KiB
Kotlin
package test.collections
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import kotlin.test.*
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import junit.framework.TestCase
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import java.util.Random
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class ImmutableArrayListTest() : TestCase() {
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fun testSimple() {
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val builder = ImmutableArrayListBuilder<Int>()
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builder.add(17)
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val list = builder.build()
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assertEquals(1, list.size())
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assertEquals(17, list[0])
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}
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fun testGet() {
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for (length in 0 .. 55) {
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val list = buildIntArray(length, 19)
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assertEquals(length, list.size)
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checkList(list, length, 19)
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}
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}
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private fun buildIntArray(length: Int, firstValue: Int): List<Int> {
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val builder = ImmutableArrayListBuilder<Int>()
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for (j in 0 .. length - 1) {
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builder.add(firstValue + j)
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}
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return builder.build()
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}
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private fun checkList(list: List<Int>, expectedLength: Int, expectedFirstValue: Int) {
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assertEquals(expectedLength, list.size)
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for (i in 0 .. expectedLength - 1) {
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assertEquals(expectedFirstValue + i, list[i])
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}
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try {
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list[expectedLength]
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fail()
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} catch (e: IndexOutOfBoundsException) {
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// expected
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}
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}
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fun testSublist() {
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val r = Random(1)
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for (i in 0 .. 200) {
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val length = r.nextInt(55)
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val list = buildIntArray(length, 23)
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val fromIndex = r.nextInt(length + 1)
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val toIndex = fromIndex + r.nextInt(length - fromIndex + 1)
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val sublist = list.subList(fromIndex, toIndex)
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checkList(sublist, toIndex - fromIndex, 23 + fromIndex)
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}
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}
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}
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