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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 test.collections.behaviors.listBehavior
import test.collections.compare
import kotlin.test.*
class ReversedViewsTest {
@Test fun testNullToString() {
assertEquals("[null]", listOf<String?>(null).asReversed().toString())
}
@Test fun testBehavior() {
val original = listOf(2L, 3L, Long.MAX_VALUE)
val reversed = original.reversed()
compare(reversed, original.asReversed()) {
listBehavior()
}
}
@Test fun testSimple() {
assertEquals(listOf(3, 2, 1), listOf(1, 2, 3).asReversed())
assertEquals(listOf(3, 2, 1), listOf(1, 2, 3).asReversed().toList())
}
@Test fun testRandomAccess() {
val reversed = listOf(1, 2, 3).asReversed()
assertEquals(3, reversed[0])
assertEquals(2, reversed[1])
assertEquals(1, reversed[2])
}
@Test fun testDoubleReverse() {
assertEquals(listOf(1, 2, 3), listOf(1, 2, 3).asReversed().asReversed())
assertEquals(listOf(2, 3), listOf(1, 2, 3, 4).asReversed().subList(1, 3).asReversed())
}
@Test fun testEmpty() {
assertEquals(emptyList<Int>(), emptyList<Int>().asReversed())
}
@Test fun testReversedSubList() {
val reversed = (1..10).toList().asReversed()
assertEquals(listOf(9, 8, 7), reversed.subList(1, 4))
}
@Test fun testMutableSubList() {
val original = arrayListOf(1, 2, 3, 4)
val reversedSubList = original.asReversed().subList(1, 3)
assertEquals(listOf(3, 2), reversedSubList)
reversedSubList.clear()
assertEquals(emptyList<Int>(), reversedSubList)
assertEquals(listOf(1, 4), original)
reversedSubList.add(100)
assertEquals(listOf(100), reversedSubList)
assertEquals(listOf(1, 100, 4), original)
}
@Test fun testMutableSimple() {
assertEquals(listOf(3, 2, 1), mutableListOf(1, 2, 3).asReversed())
assertEquals(listOf(3, 2, 1), mutableListOf(1, 2, 3).asReversed().toList())
}
@Test fun testMutableDoubleReverse() {
assertEquals(listOf(1, 2, 3), mutableListOf(1, 2, 3).asReversed().asReversed())
assertEquals(listOf(2, 3), mutableListOf(1, 2, 3, 4).asReversed().subList(1, 3).asReversed())
}
@Test fun testMutableEmpty() {
assertEquals(emptyList<Int>(), mutableListOf<Int>().asReversed())
}
@Test fun testMutableReversedSubList() {
val reversed = (1..10).toMutableList().asReversed()
assertEquals(listOf(9, 8, 7), reversed.subList(1, 4))
}
@Test fun testMutableAdd() {
val original = mutableListOf(1, 2, 3)
val reversed = original.asReversed()
reversed.add(0) // add zero at end of reversed
assertEquals(listOf(3, 2, 1, 0), reversed)
assertEquals(listOf(0, 1, 2, 3), original)
reversed.add(0, 4) // add four at position 0
assertEquals(listOf(4, 3, 2, 1, 0), reversed)
assertEquals(listOf(0, 1, 2, 3, 4), original)
}
@Test fun testMutableSet() {
val original = mutableListOf(1, 2, 3)
val reversed = original.asReversed()
reversed.set(0, 300)
reversed.set(1, 200)
reversed.set(2, 100)
assertEquals(listOf(100, 200, 300), original)
assertEquals(listOf(300, 200, 100), reversed)
}
@Test fun testMutableRemove() {
val original = mutableListOf("a", "b", "c")
val reversed = original.asReversed()
reversed.removeAt(0) // remove c
assertEquals(listOf("a", "b"), original)
assertEquals(listOf("b", "a"), reversed)
reversed.removeAt(1) // remove a
assertEquals(listOf("b"), original)
reversed.removeAt(0) // remove remaining b
assertEquals(emptyList<String>(), original)
}
@Test fun testMutableRemoveByObj() {
val original = mutableListOf("a", "b", "c")
val reversed = original.asReversed()
reversed.remove("c")
assertEquals(listOf("a", "b"), original)
assertEquals(listOf("b", "a"), reversed)
}
@Test fun testMutableClear() {
val original = mutableListOf(1, 2, 3)
val reversed = original.asReversed()
reversed.clear()
assertEquals(emptyList<Int>(), reversed)
assertEquals(emptyList<Int>(), original)
}
@Test fun testContains() {
assertTrue { 1 in listOf(1, 2, 3).asReversed() }
assertTrue { 1 in mutableListOf(1, 2, 3).asReversed() }
}
@Test fun testIndexOf() {
assertEquals(2, listOf(1, 2, 3).asReversed().indexOf(1))
assertEquals(2, mutableListOf(1, 2, 3).asReversed().indexOf(1))
}
@Test fun testBidirectionalModifications() {
val original = mutableListOf(1, 2, 3, 4)
val reversed = original.asReversed()
original.removeAt(3)
assertEquals(listOf(1, 2, 3), original)
assertEquals(listOf(3, 2, 1), reversed)
reversed.removeAt(2)
assertEquals(listOf(2, 3), original)
assertEquals(listOf(3, 2), reversed)
}
@Test fun testGetIOOB() {
val success = try {
listOf(1, 2, 3).asReversed().get(3)
true
} catch (expected: IndexOutOfBoundsException) {
false
}
assertFalse(success)
}
@Test fun testSetIOOB() {
val success = try {
mutableListOf(1, 2, 3).asReversed().set(3, 0)
true
} catch(expected: IndexOutOfBoundsException) {
false
}
assertFalse(success)
}
@Test fun testAddIOOB() {
val success = try {
mutableListOf(1, 2, 3).asReversed().add(4, 0)
true
} catch(expected: IndexOutOfBoundsException) {
false
}
assertFalse(success)
}
@Test fun testRemoveIOOB() {
val success = try {
mutableListOf(1, 2, 3).asReversed().removeAt(3)
true
} catch(expected: IndexOutOfBoundsException) {
false
}
assertFalse(success)
}
}
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