Ilya Matveev
85827b4880
This patch copies Kotlin/JVM stdlib tests (libraries/stdlib/test) excepting ones with explicit java dependencies. It also transforms the tests to use them as box-tests.
26 lines
1.1 KiB
Kotlin
26 lines
1.1 KiB
Kotlin
import kotlin.test.*
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data class Collector<out K, V>(val key: K, val values: MutableList<V> = mutableListOf<V>())
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fun box() {
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fun <K> Collector<K, String>.accumulateIfEven(e: String) = apply { if (e.length % 2 == 0) values.add(e) }
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fun <K, V> Collector<K, V>.toPair() = key to values as List<V>
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val elements = listOf("foo", "bar", "flea", "zoo", "biscuit")
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val result = elements.groupingBy { it.first() }
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.fold({ k, e -> Collector<Char, String>(k) }, { k, acc, e -> acc.accumulateIfEven(e) })
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val ordered = result.values.sortedBy { it.key }.map { it.toPair() }
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assertEquals(listOf('b' to emptyList(), 'f' to listOf("flea"), 'z' to emptyList()), ordered)
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val moreElements = listOf("fire", "zero")
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val result2 = moreElements.groupingBy { it.first() }
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.foldTo(HashMap(result),
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{ k, e -> error("should not be called for $k") },
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{ k, acc, e -> acc.accumulateIfEven(e) })
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val ordered2 = result2.values.sortedBy { it.key }.map { it.toPair() }
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assertEquals(listOf('b' to emptyList(), 'f' to listOf("flea", "fire"), 'z' to listOf("zero")), ordered2)
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}
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