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Tests for sorting methods.

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This commit is contained in:
Ilya Gorbunov
2015-07-27 18:50:24 +03:00
parent 5eb69334b4
commit 002c3e850f
3 changed files with 111 additions and 37 deletions
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libraries/stdlib/test/collections/CollectionTest.kt
+33 -31
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@@ -469,18 +469,6 @@ class CollectionTest {
assertTrue(IterableWrapper(hashSetOf(45, 14, 13)).contains(14))
}
test fun sortForMutableIterable() {
val list: MutableIterable<Int> = arrayListOf(2, 3, 1)
expect(listOf(1, 2, 3)) { list.sort() }
expect(listOf(2, 3, 1)) { list }
}
test fun sortForIterable() {
val list: Iterable<Int> = listOf(2, 3, 1)
expect(listOf(1, 2, 3)) { list.sort() }
expect(listOf(2, 3, 1)) { list }
}
test fun min() {
expect(null, { listOf<Int>().min() })
expect(1, { listOf(1).min() })
@@ -571,28 +559,28 @@ class CollectionTest {
expect(listOf(1)) { listOf(1) take 10 }
}
test fun sortBy() {
expect(listOf("two" to 2, "three" to 3)) {
listOf("three" to 3, "two" to 2).sortBy { it.second }
}
expect(listOf("three" to 3, "two" to 2)) {
listOf("three" to 3, "two" to 2).sortBy { it.first }
}
expect(listOf("two" to 2, "three" to 3)) {
listOf("three" to 3, "two" to 2).sortBy { it.first.length() }
test fun sorted() {
assertEquals(listOf(1, 3, 7), listOf(3, 7, 1).sorted())
assertEquals(listOf(7, 3, 1), listOf(3, 7, 1).sortedDescending())
}
test fun sortedBy() {
assertEquals(listOf("two" to 2, "three" to 3), listOf("three" to 3, "two" to 2).sortedBy { it.second })
assertEquals(listOf("three" to 3, "two" to 2), listOf("three" to 3, "two" to 2).sortedBy { it.first })
assertEquals(listOf("three", "two"), listOf("two", "three").sortedDescendingBy { it.length() })
}
test fun sortedNullableBy() {
fun String.nullIfEmpty() = if (isEmpty()) null else this
listOf(null, "").let {
expect(listOf(null, "")) { it.sortedBy { it.orEmpty()}}
expect(listOf("", null)) { it.sortedDescendingBy { it.orEmpty() }}
expect(listOf("", null)) { it.sortedDescendingBy { it?.nullIfEmpty() }}
}
}
test fun sortFunctionShouldReturnSortedCopyForList() {
val list: List<Int> = listOf(2, 3, 1)
expect(listOf(1, 2, 3)) { list.sort() }
expect(listOf(2, 3, 1)) { list }
}
test fun sortFunctionShouldReturnSortedCopyForIterable() {
val list: Iterable<Int> = listOf(2, 3, 1)
expect(listOf(1, 2, 3)) { list.sort() }
expect(listOf(2, 3, 1)) { list }
test fun sortedWith() {
expect(listOf("BAD", "dad", "cat")) { listOf("cat", "dad", "BAD").sortedWith(compareBy { it.toUpperCase().reverse() }) }
}
test fun decomposeFirst() {
@@ -671,3 +659,17 @@ class CollectionTest {
}
}
fun <T> Iterable<T>.assertSorted(isInOrder: (T, T) -> Boolean): Unit { this.iterator().assertSorted(isInOrder) }
fun <T> Iterator<T>.assertSorted(isInOrder: (T, T) -> Boolean) {
if (!hasNext()) return
var index = 0
var prev = next()
while (hasNext()) {
index += 1
val next = next()
assertTrue(isInOrder(prev, next), "Not in order at position $index, element[${index-1}]: $prev, element[$index]: $next")
prev = next
}
return
}