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/*
* Copyright 2010-2017 JetBrains s.r.o.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package kotlin.jdk7.test
import org.junit.Ignore
import java.io.*
import org.junit.Test
import java.util.*
import kotlin.test.*
class TryWithResourcesCloseableTest {
@Suppress("HasPlatformType") fun <T> platformNull() = Collections.singletonList(null as T).first()
class Resource(val faultyClose: Boolean = false) : Closeable {
var isClosed = false
private set
override fun close() {
if (faultyClose)
throw IOException("Close failed")
isClosed = true
}
}
@Test fun success() {
val resource = Resource()
val result = resource.use { "ok" }
assertEquals("ok", result)
assertTrue(resource.isClosed)
}
@Test fun closeFails() {
val e = assertFails {
Resource(faultyClose = true).use { "" }
}
assertTrue(e is IOException)
}
@Test fun opFailsCloseSuccess() {
val e = assertFails {
Resource().use { error("op fail") }
}
assertTrue(e is IllegalStateException)
assertTrue(e.suppressed.isEmpty())
}
@Test fun opFailsCloseFails() {
val e = assertFails {
Resource(faultyClose = true).use { error("op fail") }
}
assertTrue(e is IllegalStateException)
assertTrue(e.suppressed.single() is IOException)
}
@Test fun opFailsCloseFailsTwice() {
val e = assertFails {
Resource(faultyClose = true).use { _ ->
Resource(faultyClose = true).use { _ ->
error("op fail")
}
}
}
assertTrue(e is IllegalStateException)
val suppressed = e.suppressed
assertEquals(2, suppressed.size)
assertTrue(suppressed.all { it is IOException })
}
@Test fun nonLocalReturnInBlock() {
fun Resource.operation(nonLocal: Boolean): String {
return use { if (nonLocal) return "nonLocal" else "local" }
}
Resource().let { resource ->
val result = resource.operation(nonLocal = false)
assertEquals("local", result)
assertTrue(resource.isClosed)
}
Resource().let { resource ->
val result = resource.operation(nonLocal = true)
assertEquals("nonLocal", result)
assertTrue(resource.isClosed)
}
}
@Test fun nullableResourceSuccess() {
val resource: Resource? = null
val result = resource.use { "ok" }
assertEquals("ok", result)
}
@Test fun nullableResourceOpFails() {
val resource: Resource? = null
val e = assertFails {
resource.use { requireNotNull(it) }
}
assertTrue(e is IllegalArgumentException)
assertTrue(e.suppressed.isEmpty())
}
@Test fun platformResourceOpFails() {
val resource = platformNull<Resource>()
val e = assertFails {
resource.use { requireNotNull(it) }
}
assertTrue(e is IllegalArgumentException)
assertTrue(e.suppressed.isEmpty())
}
}
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