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11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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23 
24 /*
25  * @test
26  * @bug 8152616
27  * @summary Unit test for corner case of PrettyPrinting when SourceOutput is false
28  * @modules jdk.compiler/com.sun.tools.javac.api
29  *          jdk.compiler/com.sun.tools.javac.tree
30  */
31 
32 import java.io.File;
33 import java.io.FileOutputStream;
34 import java.io.OutputStream;
35 import java.io.StringWriter;
36 import javax.tools.StandardJavaFileManager;
37 import javax.tools.DiagnosticListener;
38 import com.sun.source.tree.CompilationUnitTree;
39 import com.sun.source.util.JavacTask;
40 import com.sun.tools.javac.api.JavacTool;
41 import com.sun.tools.javac.tree.JCTree;
42 import com.sun.tools.javac.tree.Pretty;
43 import java.io.IOException;
44 
45 public class T8152616 {
46 
PrettyPrint(JCTree tree)47     public String PrettyPrint(JCTree tree){
48         StringWriter s = new StringWriter();
49         try {
50             new Pretty(s, false).printExpr(tree);
51         }
52         catch (IOException e) {
53             throw new AssertionError(e);
54         }
55         return s.toString();
56     }
57 
main(String[] args)58     public static void main(String[] args) throws Exception {
59         T8152616 obj = new T8152616();
60         JavacTool javac = JavacTool.create();
61         StandardJavaFileManager jfm = javac.getStandardFileManager(null,null,null);
62         File file = File.createTempFile("test", ".java");
63         OutputStream outputStream = new FileOutputStream(file);
64         outputStream.write("enum Foo {AA(10), BB, CC { void m() {} }; void m() {};}".getBytes());
65         JavacTask task = javac.getTask(null, jfm, null, null, null,
66                    jfm.getJavaFileObjects(file.getAbsolutePath()));
67         Iterable<? extends CompilationUnitTree> trees = task.parse();
68         CompilationUnitTree thisTree = trees.iterator().next();
69         file.delete();
70         outputStream = new FileOutputStream(file);
71         outputStream.write((obj.PrettyPrint((JCTree)thisTree)).getBytes());
72         task = javac.getTask(null, jfm, null, null, null,
73                    jfm.getJavaFileObjects(file.getAbsolutePath()));
74         if(task.parse().toString().contains("ERROR")){
75              throw new AssertionError("parsing temp file failed with errors");
76         }else{
77              System.out.println("parsing successfull");
78         }
79         file.delete();
80     }
81 }
82