1 /*

     2  * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.

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

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.

     8  *

     9  * This code is distributed in the hope that it will be useful, but WITHOUT

    10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    12  * version 2 for more details (a copy is included in the LICENSE file that

    13  * accompanied this code).

    14  *

    15  * You should have received a copy of the GNU General Public License version

    16  * 2 along with this work; if not, write to the Free Software Foundation,

    17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    18  *

    19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    20  * or visit www.oracle.com if you need additional information or have any

    21  * questions.

    22  */

    23 

    24 /*

    25  * @test

    26  * @summary Test custom id generators

    27  * @build KullaTesting TestingInputStream

    28  * @run testng IdGeneratorTest

    29  */

    30 

    31 import java.io.ByteArrayOutputStream;

    32 import java.io.PrintStream;

    33 import java.util.List;

    34 import java.util.function.Supplier;

    35 

    36 import jdk.jshell.EvalException;

    37 import jdk.jshell.JShell;

    38 import jdk.jshell.SnippetEvent;

    39 import jdk.jshell.UnresolvedReferenceException;

    40 import jdk.jshell.VarSnippet;

    41 import org.testng.annotations.Test;

    42 

    43 import static org.testng.Assert.assertEquals;

    44 import static org.testng.Assert.assertTrue;

    45 

    46 @Test

    47 public class IdGeneratorTest {

    48 

    49     public JShell.Builder getBuilder() {

    50         TestingInputStream inStream = new TestingInputStream();

    51         ByteArrayOutputStream outStream = new ByteArrayOutputStream();

    52         ByteArrayOutputStream errStream = new ByteArrayOutputStream();

    53         return JShell.builder()

    54                 .in(inStream)

    55                 .out(new PrintStream(outStream))

    56                 .err(new PrintStream(errStream));

    57     }

    58 

    59     public void testTempNameGenerator() {

    60         JShell.Builder builder = getBuilder().tempVariableNameGenerator(new Supplier<String>() {

    61             int count = 0;

    62 

    63             @Override

    64             public String get() {

    65                 return "temp" + ++count;

    66             }

    67         });

    68         try (JShell jShell = builder.build()) {

    69             for (int i = 0; i < 3; ++i) {

    70                 VarSnippet v = (VarSnippet) jShell.eval("2 + " + (i + 1)).get(0).snippet();

    71                 assertEquals("temp" + (i + 1), v.name(), "Custom id: ");

    72             }

    73         }

    74     }

    75 

    76     public void testResetTempNameGenerator() {

    77         JShell.Builder builder = getBuilder().tempVariableNameGenerator(() -> {

    78             throw new AssertionError("Should not be called");

    79         });

    80         try (JShell jShell = builder.tempVariableNameGenerator(null).build()) {

    81             jShell.eval("2 + 2");

    82         }

    83     }

    84 

    85     public void testIdGenerator() {

    86         JShell.Builder builder = getBuilder().idGenerator(((snippet, id) -> "custom" + id));

    87         try (JShell jShell = builder.build()) {

    88             List<SnippetEvent> eval = jShell.eval("int a, b;");

    89             checkIds(eval);

    90             checkIds(jShell.drop(eval.get(0).snippet()));

    91         }

    92     }

    93 

    94     private void checkIds(List<SnippetEvent> events) {

    95         for (SnippetEvent event : events) {

    96             assertTrue(event.snippet().id().startsWith("custom"), "Not started with \"custom\": "

    97                     + event.snippet().id());

    98         }

    99     }

   100 

   101     public void testIdInException() {

   102         JShell.Builder builder = getBuilder().idGenerator(((snippet, id) -> "custom" + id));

   103         try (JShell jShell = builder.build()) {

   104             EvalException evalException = (EvalException) jShell.eval("throw new Error();").get(0).exception();

   105             for (StackTraceElement ste : evalException.getStackTrace()) {

   106                 assertTrue(ste.getFileName().startsWith("#custom"), "Not started with \"#custom\": "

   107                         + ste.getFileName());

   108             }

   109             jShell.eval("void f() { g(); }");

   110             UnresolvedReferenceException unresolvedException = (UnresolvedReferenceException) jShell.eval("f();").get(0).exception();

   111             for (StackTraceElement ste : unresolvedException.getStackTrace()) {

   112                 assertTrue(ste.getFileName().startsWith("#custom"), "Not started with \"#custom\": "

   113                         + ste.getFileName());

   114             }

   115         }

   116     }

   117 

   118     public void testResetIdGenerator() {

   119         JShell.Builder builder = getBuilder().idGenerator((sn, id) -> {

   120             throw new AssertionError("Should not be called");

   121         });

   122         try (JShell jShell = builder.idGenerator(null).build()) {

   123             jShell.eval("2 + 2");

   124         }

   125     }

   126 }