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/*
* Copyright 2016-2021 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 LastTest : TestBase() {
@Test
fun testLast() = runTest {
val flow = flowOf(1, 2, 3)
assertEquals(3, flow.last())
assertEquals(3, flow.lastOrNull())
}
@Test
fun testNulls() = runTest {
val flow = flowOf(1, null)
assertNull(flow.last())
assertNull(flow.lastOrNull())
}
@Test
fun testNullsLastOrNull() = runTest {
val flow = flowOf(null, 1)
assertEquals(1, flow.lastOrNull())
}
@Test
fun testEmptyFlow() = runTest {
assertFailsWith<NoSuchElementException> { emptyFlow<Int>().last() }
assertNull(emptyFlow<Int>().lastOrNull())
}
@Test
fun testBadClass() = runTest {
val instance = BadClass()
val flow = flowOf(instance)
assertSame(instance, flow.last())
assertSame(instance, flow.lastOrNull())
}
}
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