Ilya Gorbunov
6a3cb0eff8
Implement distinct() and toMutableSet() for sequences. Breaking change: distinct() now returns List instead of Set. #KT-5834 Fixed #KT-6063 Fixed
35 lines
1.3 KiB
Kotlin
35 lines
1.3 KiB
Kotlin
package test.collections
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import kotlin.test.*
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import org.junit.Test as test
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class SetOperationsTest {
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test fun distinct() {
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assertEquals(listOf(1, 3, 5), listOf(1, 3, 3, 1, 5, 1, 3).distinct())
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assertTrue(listOf<Int>().distinct().isEmpty())
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}
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test fun distinctBy() {
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assertEquals(listOf("some", "cat", "do"), arrayOf("some", "case", "cat", "do", "dog", "it").distinctBy { it.length() })
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assertTrue(charArrayOf().distinctBy { it }.isEmpty())
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}
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test fun union() {
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assertEquals(listOf(1, 3, 5), listOf(1, 3).union(listOf(5)).toList())
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assertEquals(listOf(1), listOf<Int>().union(listOf(1)).toList())
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}
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test fun subtract() {
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assertEquals(listOf(1, 3), listOf(1, 3).subtract(listOf(5)).toList())
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assertEquals(listOf(1, 3), listOf(1, 3, 5).subtract(listOf(5)).toList())
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assertTrue(listOf(1, 3, 5).subtract(listOf(1, 3, 5)).none())
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assertTrue(listOf<Int>().subtract(listOf(1)).none())
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}
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test fun intersect() {
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assertTrue(listOf(1, 3).intersect(listOf(5)).none())
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assertEquals(listOf(5), listOf(1, 3, 5).intersect(listOf(5)).toList())
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assertEquals(listOf(1, 3, 5), listOf(1, 3, 5).intersect(listOf(1, 3, 5)).toList())
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assertTrue(listOf<Int>().intersect(listOf(1)).none())
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}
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} |