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/*
* Copyright 2010-2018 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license
* that can be found in the license/LICENSE.txt file.
*/
package test.collections
import kotlin.random.Random
import kotlin.test.*
class MutableCollectionTest {
fun <T, C : MutableCollection<T>> testOperation(before: List<T>, after: List<T>, expectedModified: Boolean, toMutableCollection: (List<T>) -> C) =
fun(operation: (C.() -> Boolean)) {
val list = toMutableCollection(before)
assertEquals(expectedModified, list.operation())
assertEquals(toMutableCollection(after), list)
}
fun <T> testOperation(before: List<T>, after: List<T>, expectedModified: Boolean) =
testOperation(before, after, expectedModified, { it.toMutableList() })
@Test fun addAll() {
val data = listOf("foo", "bar")
testOperation(emptyList(), data, true).let { assertAdd ->
assertAdd { addAll(data) }
assertAdd { addAll(data.toTypedArray()) }
assertAdd { addAll(data.toTypedArray().asIterable()) }
assertAdd { addAll(data.asSequence()) }
}
testOperation(data, data, false, { it.toCollection(LinkedHashSet()) }).let { assertAdd ->
assertAdd { addAll(data) }
assertAdd { addAll(data.toTypedArray()) }
assertAdd { addAll(data.toTypedArray().asIterable()) }
assertAdd { addAll(data.asSequence()) }
}
}
@Test fun removeAll() {
val content = listOf("foo", "bar", "bar")
val data = listOf("bar")
val expected = listOf("foo")
testOperation(content, expected, true).let { assertRemove ->
assertRemove { removeAll(data) }
assertRemove { removeAll(data.toTypedArray()) }
assertRemove { removeAll(data.toTypedArray().asIterable()) }
assertRemove { removeAll { it in data } }
assertRemove { (this as MutableIterable<String>).removeAll { it in data } }
val predicate = { cs: CharSequence -> cs.first() == 'b' }
assertRemove { removeAll(predicate) }
}
testOperation(content, content, false).let { assertRemove ->
assertRemove { removeAll(emptyList()) }
assertRemove { removeAll(emptyArray()) }
assertRemove { removeAll(emptySequence()) }
assertRemove { removeAll { false } }
assertRemove { (this as MutableIterable<String>).removeAll { false } }
}
}
@Test fun retainAll() {
val content = listOf("foo", "bar", "bar")
val expected = listOf("bar", "bar")
testOperation(content, expected, true).let { assertRetain ->
val data = listOf("bar")
assertRetain { retainAll(data) }
assertRetain { retainAll(data.toTypedArray()) }
assertRetain { retainAll(data.toTypedArray().asIterable()) }
assertRetain { retainAll(data.asSequence()) }
assertRetain { retainAll { it in data } }
assertRetain { (this as MutableIterable<String>).retainAll { it in data } }
val predicate = { cs: CharSequence -> cs.first() == 'b' }
assertRetain { retainAll(predicate) }
}
testOperation(content, emptyList(), true).let { assertRetain ->
val data = emptyList<String>()
assertRetain { retainAll(data) }
assertRetain { retainAll(data.toTypedArray()) }
assertRetain { retainAll(data.toTypedArray().asIterable()) }
assertRetain { retainAll(data.asSequence()) }
assertRetain { retainAll { it in data } }
assertRetain { (this as MutableIterable<String>).retainAll { it in data } }
}
testOperation(emptyList<String>(), emptyList(), false).let { assertRetain ->
val data = emptyList<String>()
assertRetain { retainAll(data) }
assertRetain { retainAll(data.toTypedArray()) }
assertRetain { retainAll(data.toTypedArray().asIterable()) }
assertRetain { retainAll(data.asSequence()) }
assertRetain { retainAll { it in data } }
assertRetain { (this as MutableIterable<String>).retainAll { it in data } }
}
}
@Test fun listFill() {
val list = MutableList(3) { it }
list.fill(42)
assertEquals(listOf(42, 42, 42), list)
}
@Test fun shuffled() {
val list = MutableList(100) { it }
val shuffled = list.shuffled()
assertNotEquals(list, shuffled)
assertEquals(list.toSet(), shuffled.toSet())
assertEquals(list.size, shuffled.distinct().size)
}
@Test fun shuffledPredictably() {
val list = List(10) { it }
val shuffled1 = list.shuffled(Random(1))
val shuffled11 = list.shuffled(Random(1))
assertEquals(shuffled1, shuffled11)
assertEquals("[1, 4, 0, 6, 2, 8, 9, 7, 3, 5]", shuffled1.toString())
val shuffled2 = list.shuffled(Random(42))
assertEquals("[5, 0, 4, 9, 2, 8, 1, 7, 6, 3]", shuffled2.toString())
}
}
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