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 /*

  * Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.

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

  *

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

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

  * published by the Free Software Foundation.

  *

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

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

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

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

  * accompanied this code).

  *

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

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

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

  *

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

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

  * questions.

  */

 /*

  * @test

  * @bug 6968063

  * @summary provide examples of code that generate diagnostics

  * @build Example CheckExamples

  * @run main CheckExamples

  */

 import java.io.*;

 import java.util.*;

 /**

  * Check invariants for a set of examples.

  * -- each example should exactly declare the keys that will be generated when

  *      it is run.

  * -- together, the examples should cover the set of resource keys in the

  *      compiler.properties bundle. A list of exceptions may be given in the

  *      not-yet.txt file. Entries on the not-yet.txt list should not be

  *      covered by examples.

  * When new keys are added to the resource bundle, it is strongly recommended

  * that corresponding new examples be added here, if at all practical, instead

  * of simply and lazily being added to the not-yet.txt list.

  */

 public class CheckExamples {

     /**

      * Standard entry point.

      */

     public static void main(String... args) throws Exception {

         new CheckExamples().run();

     }

     /**

      * Run the test.

      */

     void run() throws Exception {

         Set<Example> examples = getExamples();

         Set<String> notYetList = getNotYetList();

         Set<String> declaredKeys = new TreeSet<String>();

         for (Example e: examples) {

             Set<String> e_decl = e.getDeclaredKeys();

             Set<String> e_actual = e.getActualKeys();

             for (String k: e_decl) {

                 if (!e_actual.contains(k))

                     error("Example " + e + " declares key " + k + " but does not generate it");

             }

             for (String k: e_actual) {

                 if (!e_decl.contains(k))

                     error("Example " + e + " generates key " + k + " but does not declare it");

             }

             for (String k: e.getDeclaredKeys()) {

                 if (notYetList.contains(k))

                     error("Example " + e + " declares key " + k + " which is also on the \"not yet\" list");

                 declaredKeys.add(k);

             }

         }

         ResourceBundle b =

             ResourceBundle.getBundle("com.sun.tools.javac.resources.compiler");

         Set<String> resourceKeys = new TreeSet<String>(b.keySet());

         for (String dk: declaredKeys) {

             if (!resourceKeys.contains(dk))

                 error("Key " + dk + " is declared in tests but is not a valid key in resource bundle");

         }

         for (String nk: notYetList) {

             if (!resourceKeys.contains(nk))

                 error("Key " + nk + " is declared in not-yet list but is not a valid key in resource bundle");

         }

         for (String rk: resourceKeys) {

             if (!declaredKeys.contains(rk) && !notYetList.contains(rk))

                 error("Key " + rk + " is declared in resource bundle but is not in tests or not-yet list");

         }

         System.err.println(examples.size() + " examples checked");

         System.err.println(notYetList.size() + " keys on not-yet list");

         Counts declaredCounts = new Counts(declaredKeys);

         Counts resourceCounts = new Counts(resourceKeys);

         List<String> rows = new ArrayList<String>(Arrays.asList(Counts.prefixes));

         rows.add("other");

         rows.add("total");

         System.err.println();

         System.err.println(String.format("%-14s %15s %15s %4s",

                 "prefix", "#keys in tests", "#keys in javac", "%"));

         for (String p: rows) {

             int d = declaredCounts.get(p);

             int r = resourceCounts.get(p);

             System.err.print(String.format("%-14s %15d %15d", p, d, r));

             if (r != 0)

                 System.err.print(String.format(" %3d%%", (d * 100) / r));

             System.err.println();

         }

         if (errors > 0)

             throw new Exception(errors + " errors occurred.");

     }

     /**

      * Get the complete set of examples to be checked.

      */

     Set<Example> getExamples() {

         Set<Example> results = new TreeSet<Example>();

         File testSrc = new File(System.getProperty("test.src"));

         File examples = new File(testSrc, "examples");

         for (File f: examples.listFiles()) {

             if (isValidExample(f))

                 results.add(new Example(f));

         }

         return results;

     }

     boolean isValidExample(File f) {

         return (f.isDirectory() && f.list().length > 0) ||

                 (f.isFile() && f.getName().endsWith(".java"));

     }

     /**

      * Get the contents of the "not-yet" list.

      */

     Set<String> getNotYetList() {

         Set<String> results = new TreeSet<String>();

         File testSrc = new File(System.getProperty("test.src"));

         File notYetList = new File(testSrc, "examples.not-yet.txt");

         try {

             String[] lines = read(notYetList).split("[\r\n]");

             for (String line: lines) {

                 int hash = line.indexOf("#");

                 if (hash != -1)

                     line = line.substring(0, hash).trim();

                 if (line.matches("[A-Za-z0-9-_.]+"))

                     results.add(line);

             }

         } catch (IOException e) {

             throw new Error(e);

         }

         return results;

     }

     /**

      * Read the contents of a file.

      */

     String read(File f) throws IOException {

         byte[] bytes = new byte[(int) f.length()];

         DataInputStream in = new DataInputStream(new FileInputStream(f));

         try {

             in.readFully(bytes);

         } finally {

             in.close();

         }

         return new String(bytes);

     }

     /**

      * Report an error.

      */

     void error(String msg) {

         System.err.println("Error: " + msg);

         errors++;

     }

     int errors;

     static class Counts {

         static String[] prefixes = {

             "compiler.err.",

             "compiler.warn.",

             "compiler.note.",

             "compiler.misc."

         };

         Counts(Set<String> keys) {

             nextKey:

             for (String k: keys) {

                 for (String p: prefixes) {

                     if (k.startsWith(p)) {

                         inc(p);

                         continue nextKey;

                     }

                 }

                 inc("other");

             }

             table.put("total", keys.size());

         }

         int get(String p) {

              Integer i = table.get(p);

              return (i == null ? 0 : i);

         }

         void inc(String p) {

             Integer i = table.get(p);

             table.put(p, (i == null ? 1 : i + 1));

         }

         Map<String,Integer> table = new HashMap<String,Integer>();

     };

 }