Kotlin: Add FP test cases for resource leaks

Author: tamasvajk

java/ql/test/kotlin/query-tests/CloseReader/CloseReader.expected

@@ -0,0 +1 @@
+| CloseReader.kt:4:20:4:45 | new FileReader(...) | This FileReader is not always closed on method exit. |

java/ql/test/kotlin/query-tests/CloseReader/CloseReader.kt

@@ -0,0 +1,7 @@
+import java.io.*
+
+fun test0() {
+    BufferedReader(FileReader("C:\\test.txt")).use { bw ->
+        bw.readLine()
+    }
+}

java/ql/test/kotlin/query-tests/CloseReader/CloseReader.qlref

@@ -0,0 +1 @@
+Likely Bugs/Resource Leaks/CloseReader.ql

java/ql/test/kotlin/query-tests/CloseWriter/CloseWriter.expected

@@ -0,0 +1,8 @@
+| CloseWriter.kt:4:29:4:54 | new FileWriter(...) | This FileWriter is not always closed on method exit. |
+| CloseWriter.kt:9:20:9:45 | new FileWriter(...) | This FileWriter is not always closed on method exit. |
+| CloseWriter.kt:15:14:15:57 | new FileOutputStream(...) | This FileOutputStream is not always closed on method exit. |
+| CloseWriter.kt:20:5:20:48 | new FileOutputStream(...) | This FileOutputStream is not always closed on method exit. |
+| CloseWriter.kt:26:33:26:76 | new FileOutputStream(...) | This FileOutputStream is not always closed on method exit. |
+| CloseWriter.kt:31:24:31:67 | new FileOutputStream(...) | This FileOutputStream is not always closed on method exit. |
+| CloseWriter.kt:37:33:37:76 | new FileOutputStream(...) | This FileOutputStream is not always closed on method exit. |
+| CloseWriter.kt:42:24:42:67 | new FileOutputStream(...) | This FileOutputStream is not always closed on method exit. |

java/ql/test/kotlin/query-tests/CloseWriter/CloseWriter.kt

@@ -0,0 +1,45 @@
+import java.io.*
+
+fun test0() {
+    val bw = BufferedWriter(FileWriter("C:\\test.txt"))
+    bw.write("test")
+}
+
+fun test1() {
+    BufferedWriter(FileWriter("C:\\test.txt")).use { bw ->
+        bw.write("test")
+    }
+}
+
+fun test2() {
+    val bw = FileOutputStream(File.createTempFile("","")).bufferedWriter()
+    bw.write("test")
+}
+
+fun test3() {
+    FileOutputStream(File.createTempFile("","")).bufferedWriter().use { bw ->
+        bw.write("test")
+    }
+}
+
+fun test4() {
+    val bw = OutputStreamWriter(FileOutputStream(File.createTempFile("",""))).buffered()
+    bw.write("test")
+}
+
+fun test5() {
+    OutputStreamWriter(FileOutputStream(File.createTempFile("",""))).buffered().use { bw ->
+        bw.write("test")
+    }
+}
+
+fun test6() {
+    val bw = OutputStreamWriter(FileOutputStream(File.createTempFile("","")))
+    bw.write("test")
+}
+
+fun test7() {
+    OutputStreamWriter(FileOutputStream(File.createTempFile("",""))).use { bw ->
+        bw.write("test")
+    }
+}

java/ql/test/kotlin/query-tests/CloseWriter/CloseWriter.qlref

@@ -0,0 +1 @@
+Likely Bugs/Resource Leaks/CloseWriter.ql