Reorganize existing Closeable/AutoCloseable.use tests

libraries/stdlib/jdk7/test/AutoCloseableContractsTest.kt

@@ -1,25 +0,0 @@
-/*
- * Copyright 2010-2019 JetBrains s.r.o. and Kotlin Programming Language contributors.
- * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
- */
-
-package kotlin.jdk7.test
-
-import org.junit.Test
-import kotlin.test.assertEquals
-
-class AutoCloseableContractsTest {
-    @Test
-    fun shouldHaveBlockExactlyOnceContract() {
-        class TestAutoCloseable : AutoCloseable {
-            override fun close() {
-            }
-        }
-
-        val i: Int
-        TestAutoCloseable().use {
-            i = 1
-        }
-        assertEquals(1, i)
-    }
-}

libraries/stdlib/jdk7/test/UseAutoCloseableResourceTest.kt

@@ -1,29 +1,17 @@
 /*
- * 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.
+ * Copyright 2010-2019 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
  */
 
 package kotlin.jdk7.test
 
 import java.io.*
-import org.junit.Test
 import java.util.*
 import kotlin.test.*
 
-class TryWithResourcesAutoCloseableTest {
+class UseAutoCloseableResourceTest {
 
-    @Suppress("HasPlatformType") fun <T> platformNull() = Collections.singletonList(null as T).first()
+    @Suppress("HasPlatformType", "UNCHECKED_CAST") fun <T> platformNull() = Collections.singletonList(null as T).first()
 
     class Resource(val faultyClose: Boolean = false) : AutoCloseable {
 
@@ -125,4 +113,15 @@ class TryWithResourcesAutoCloseableTest {
         assertTrue(e.suppressed.isEmpty())
     }
 
+
+    @Test
+    fun contractCallsInPlace() {
+        val i: Int
+        Resource().use { _ ->
+            Resource().use { _ ->
+                i = 1
+            }
+        }
+        assertEquals(1, i)
+    }
 }

libraries/stdlib/jdk7/test/UseCloseableResourceTest.kt

@@ -1,30 +1,17 @@
 /*
- * 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.
+ * Copyright 2010-2019 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
  */
 
 package kotlin.jdk7.test
 
-import org.junit.Ignore
 import java.io.*
-import org.junit.Test
 import java.util.*
 import kotlin.test.*
 
-class TryWithResourcesCloseableTest {
+class UseCloseableResourceTest {
 
-    @Suppress("HasPlatformType") fun <T> platformNull() = Collections.singletonList(null as T).first()
+    @Suppress("HasPlatformType", "UNCHECKED_CAST") fun <T> platformNull() = Collections.singletonList(null as T).first()
 
     class Resource(val faultyClose: Boolean = false) : Closeable {
 
@@ -124,4 +111,15 @@ class TryWithResourcesCloseableTest {
         assertTrue(e is IllegalArgumentException)
         assertTrue(e.suppressed.isEmpty())
     }
+
+    @Test
+    fun contractCallsInPlace() {
+        val i: Int
+        Resource().use { _ ->
+            Resource().use { _ ->
+                i = 1
+            }
+        }
+        assertEquals(1, i)
+    }
 }

libraries/stdlib/jvm/test/io/Closeable.kt

@@ -1,20 +0,0 @@
-/*
- * Copyright 2010-2019 JetBrains s.r.o. and Kotlin Programming Language contributors.
- * 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.io
-
-import org.junit.Test
-import kotlin.test.assertEquals
-
-class CloseableTest {
-    @Test
-    fun shouldHaveBlockExactlyOnceContract() {
-        val i: Int
-        "".byteInputStream().use {
-            i = 1
-        }
-        assertEquals(1, i)
-    }
-}

libraries/stdlib/jvm/test/io/ReadWrite.kt

@@ -12,7 +12,7 @@ import java.io.StringReader
 import java.net.URL
 import java.util.ArrayList
 
-fun sample(): Reader = StringReader("Hello\nWorld");
+private fun sample(): Reader = StringReader("Hello\nWorld");
 
 class ReadWriteTest {
     @Test fun testAppendText() {
@@ -124,34 +124,6 @@ class ReadWriteTest {
         file.deleteOnExit()
     }
 
-
-
-    @Test fun testUse() {
-        val list = ArrayList<String>()
-        val reader = sample().buffered()
-
-        reader.use {
-            while (true) {
-                val line = it.readLine()
-                if (line != null)
-                    list.add(line)
-                else
-                    break
-            }
-        }
-
-        assertEquals(arrayListOf("Hello", "World"), list)
-    }
-
-    @Test fun testPlatformNullUse() {
-        fun <T> platformNull() = @Suppress("UNCHECKED_CAST") java.util.Collections.singleton(null as T).first()
-        val resource = platformNull<java.io.Closeable>()
-        val result = resource.use {
-            "ok"
-        }
-        assertEquals("ok", result)
-    }
-
     @Test fun testURL() {
         val url = URL("http://kotlinlang.org")
         val text = url.readText()

libraries/stdlib/jvm/test/io/UseCloseableResourceTest.kt

@@ -0,0 +1,135 @@
+/*
+ * Copyright 2010-2019 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * 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.io
+
+import java.io.*
+import java.util.*
+import kotlin.test.*
+
+class UseCloseableResourceTest {
+
+    @Test
+    fun useReader() {
+        val reader = StringReader("Hello\nWorld").buffered()
+        val firstLine: String
+        val secondLine: String = reader.use {
+            firstLine = it.readLine()
+            it.readLine()
+        }
+        assertEquals("Hello", firstLine)
+        assertEquals("World", secondLine)
+    }
+
+
+    @Suppress("HasPlatformType", "UNCHECKED_CAST") 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()) - no suppressed in JDK6
+    }
+
+    @Test fun opFailsCloseFails() {
+        val e = assertFails {
+            Resource(faultyClose = true).use { error("op fail") }
+        }
+        assertTrue(e is IllegalStateException)
+        // assertTrue(e.suppressed.single() is IOException) - no suppressed in JDK6
+    }
+
+    @Test fun opFailsCloseFailsTwice() {
+        val e = assertFails {
+            Resource(faultyClose = true).use { _ ->
+                Resource(faultyClose = true).use { _ ->
+                    error("op fail")
+                }
+            }
+        }
+        assertTrue(e is IllegalStateException)
+    }
+
+    @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()) - no suppressed in JDK6
+    }
+
+    @Test fun platformResourceOpFails() {
+        val resource = platformNull<Resource>()
+        val e = assertFails {
+            resource.use { requireNotNull(it) }
+        }
+        assertTrue(e is IllegalArgumentException)
+        // assertTrue(e.suppressed.isEmpty()) - no suppressed in JDK6
+    }
+
+    @Test
+    fun contractCallsInPlace() {
+        val i: Int
+        Resource().use { _ ->
+            Resource().use { _ ->
+                i = 1
+            }
+        }
+        assertEquals(1, i)
+    }
+}