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/*
* Copyright 2016-2019 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license.
*/
package kotlinx.coroutines.flow
import kotlinx.coroutines.*
import kotlin.test.*
class IndexedTest : TestBase() {
@Test
fun testWithIndex() = runTest {
val flow = flowOf(3, 2, 1).withIndex()
assertEquals(listOf(IndexedValue(0, 3), IndexedValue(1, 2), IndexedValue(2, 1)), flow.toList())
}
@Test
fun testWithIndexEmpty() = runTest {
val flow = emptyFlow<Int>().withIndex()
assertEquals(emptyList(), flow.toList())
}
@Test
fun testCollectIndexed() = runTest {
val result = ArrayList<IndexedValue<Long>>()
flowOf(3L, 2L, 1L).collectIndexed { index, value ->
result.add(IndexedValue(index, value))
}
assertEquals(listOf(IndexedValue(0, 3L), IndexedValue(1, 2L), IndexedValue(2, 1L)), result)
}
@Test
fun testCollectIndexedEmptyFlow() = runTest {
val flow = flow<Int> {
expect(1)
}
flow.collectIndexed { _, _ ->
expectUnreached()
}
finish(2)
}
}
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