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  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

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 /*

  * @test

  * @bug 8019486 8026861 8027142

  * @summary javac, generates erroneous LVT for a test case with lambda code

  * @library /tools/javac/lib

  * @build ToolBox

  * @run main WrongLNTForLambdaTest

  */

 import java.io.File;

 import java.nio.file.Paths;

 import com.sun.tools.classfile.ClassFile;

 import com.sun.tools.classfile.Code_attribute;

 import com.sun.tools.classfile.LineNumberTable_attribute;

 import com.sun.tools.classfile.Method;

 import com.sun.tools.javac.util.Assert;

 public class WrongLNTForLambdaTest {

     static final String testSource =

     /* 01 */        "import java.util.List;\n" +

     /* 02 */        "import java.util.Arrays;\n" +

     /* 03 */        "import java.util.stream.Collectors;\n" +

     /* 04 */        "\n" +

     /* 05 */        "public class Foo {\n" +

     /* 06 */        "    void bar(int value) {\n" +

     /* 07 */        "        final List<Integer> numbers = Arrays.asList(1, 2, 3);\n" +

     /* 08 */        "        final List<Integer> numbersPlusOne = \n" +

     /* 09 */        "             numbers.stream().map(number -> number / 1).collect(Collectors.toList());\n" +

     /* 10 */        "    }\n" +

     /* 11 */        "    void variablesInLambdas(int value) {\n" +

     /* 12 */        "        Runnable r1 = () -> {\n" +

     /* 13 */        "            int i  = value;\n" +

     /* 14 */        "            class FooBar<T extends CharSequence> {\n" +

     /* 15 */        "                public void run() {\n" +

     /* 16 */        "                    T t = null;\n" +

     /* 17 */        "                }\n" +

     /* 18 */        "            }\n" +

     /* 19 */        "        };\n" +

     /* 20 */        "        Runnable r2 = () -> System.err.println(1);\n" +

     /* 21 */        "        Runnable r3 = (Runnable & java.io.Serializable) this::foo;\n" +

     /* 22 */        "        Runnable r4 = super :: notify;\n" +

     /* 23 */        "    }\n" +

     /* 24 */        "    private void foo() {}\n" +

     /* 25 */        "    void assignLambda() {\n" +

     /* 26 */        "        Runnable r = () -> { };\n" +

     /* 27 */        "    }\n" +

     /* 28 */        "    void callLambda(int i, Runnable r) {\n" +

     /* 29 */        "        callLambda(0,\n" +

     /* 30 */        "                   () -> { });\n" +

     /* 31 */        "    }\n" +

     /* 32 */        "}";

     static final int[][] simpleLambdaExpectedLNT = {

     //  {line-number, start-pc},

         {9,           0},       //number -> number / 1

     };

     static final int[][] lambdaWithVarsExpectedLNT = {

     //  {line-number, start-pc},

         {13,           0},       //number -> number / 1

         {19,           2},       //number -> number / 1

     };

     static final int[][] insideLambdaWithVarsExpectedLNT = {

     //  {line-number, start-pc},

         {16,           0},       //number -> number / 1

         {17,           2},       //number -> number / 1

     };

     static final int[][] lambdaVoid2VoidExpectedLNT = {

     //  {line-number, start-pc},

         {20,           0},       //number -> number / 1

     };

     static final int[][] deserializeExpectedLNT = {

     //  {line-number, start-pc},

         {05,           0},       //number -> number / 1

     };

     static final int[][] lambdaBridgeExpectedLNT = {

     //  {line-number, start-pc},

         {22,           0},       //number -> number / 1

     };

     static final int[][] assignmentExpectedLNT = {

     //  {line-number, start-pc},

         {26,           0},       //number -> number / 1

         {27,           6},       //number -> number / 1

     };

     static final int[][] callExpectedLNT = {

     //  {line-number, start-pc},

         {29,           0},       //number -> number / 1

         {31,           10},       //number -> number / 1

     };

     public static void main(String[] args) throws Exception {

         new WrongLNTForLambdaTest().run();

     }

     void run() throws Exception {

         compileTestClass();

         checkClassFile(new File(Paths.get(System.getProperty("user.dir"),

                 "Foo.class").toUri()), "lambda$bar$0", simpleLambdaExpectedLNT);

         checkClassFile(new File(Paths.get(System.getProperty("user.dir"),

                 "Foo.class").toUri()), "lambda$variablesInLambdas$1", lambdaWithVarsExpectedLNT);

         checkClassFile(new File(Paths.get(System.getProperty("user.dir"),

                 "Foo$1FooBar.class").toUri()), "run", insideLambdaWithVarsExpectedLNT);

         checkClassFile(new File(Paths.get(System.getProperty("user.dir"),

                 "Foo.class").toUri()), "lambda$variablesInLambdas$2", lambdaVoid2VoidExpectedLNT);

         checkClassFile(new File(Paths.get(System.getProperty("user.dir"),

                 "Foo.class").toUri()), "$deserializeLambda$", deserializeExpectedLNT);

         checkClassFile(new File(Paths.get(System.getProperty("user.dir"),

                 "Foo.class").toUri()), "lambda$MR$variablesInLambdas$notify$8bc4f5bd$1", lambdaBridgeExpectedLNT);

         checkClassFile(new File(Paths.get(System.getProperty("user.dir"),

                 "Foo.class").toUri()), "assignLambda", assignmentExpectedLNT);

         checkClassFile(new File(Paths.get(System.getProperty("user.dir"),

                 "Foo.class").toUri()), "callLambda", callExpectedLNT);

     }

     void compileTestClass() throws Exception {

         ToolBox.JavaToolArgs javacSuccessArgs =

                 new ToolBox.JavaToolArgs().setSources(testSource);

         ToolBox.javac(javacSuccessArgs);

     }

     void checkClassFile(final File cfile, String methodToFind, int[][] expectedLNT) throws Exception {

         ClassFile classFile = ClassFile.read(cfile);

         boolean methodFound = false;

         for (Method method : classFile.methods) {

             if (method.getName(classFile.constant_pool).equals(methodToFind)) {

                 methodFound = true;

                 Code_attribute code = (Code_attribute) method.attributes.get("Code");

                 LineNumberTable_attribute lnt =

                         (LineNumberTable_attribute) code.attributes.get("LineNumberTable");

                 Assert.check(lnt.line_number_table_length == expectedLNT.length,

                         "The LineNumberTable found has a length different to the expected one");

                 int i = 0;

                 for (LineNumberTable_attribute.Entry entry: lnt.line_number_table) {

                     Assert.check(entry.line_number == expectedLNT[i][0] &&

                             entry.start_pc == expectedLNT[i][1],

                             "LNT entry at pos " + i + " differ from expected." +

                             "Found " + entry.line_number + ":" + entry.start_pc +

                             ". Expected " + expectedLNT[i][0] + ":" + expectedLNT[i][1]);

                     i++;

                 }

             }

         }

         Assert.check(methodFound, "The seek method was not found");

     }

     void error(String msg) {

         throw new AssertionError(msg);

     }

 }