jdk

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/*
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 * Copyright (c) 2018, Google Inc. All rights reserved.
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
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 * This code is free software; you can redistribute it and/or modify it
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 * under the terms of the GNU General Public License version 2 only, as
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 * published by the Free Software Foundation.
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 *
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 * This code is distributed in the hope that it will be useful, but WITHOUT
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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 * version 2 for more details (a copy is included in the LICENSE file that
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 * accompanied this code).
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 *
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 * You should have received a copy of the GNU General Public License version
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 * 2 along with this work; if not, write to the Free Software Foundation,
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 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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 *
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 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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 * or visit www.oracle.com if you need additional information or have any
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 * questions.
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 */
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/*
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 * @test
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 * @bug 8179373
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 * @summary javac -verbose logs the class path multiple times
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 * @modules jdk.compiler
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 * @run main VerboseClassPathTest
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 */
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import java.io.BufferedReader;
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import java.io.PrintWriter;
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import java.io.StringReader;
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import java.io.StringWriter;
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import java.nio.file.Path;
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import java.nio.file.Paths;
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import java.util.spi.ToolProvider;
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public class VerboseClassPathTest {
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    public static void main(String... args) throws Exception {
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        new VerboseClassPathTest().run();
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    }
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    void run() throws Exception {
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        String className = getClass().getName();
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        Path testSrc = Paths.get(System.getProperty("test.src"));
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        Path file = testSrc.resolve(className + ".java");
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        ToolProvider javac = ToolProvider.findFirst("javac").orElseThrow();
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        StringWriter sw = new StringWriter();
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        PrintWriter pw = new PrintWriter(sw, true);
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        int rc =
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                javac.run(
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                        pw,
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                        pw,
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                        "-d",
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                        ",",
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                        "-source",
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                        "8",
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                        "-target",
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                        "8",
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                        "-verbose",
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                        file.toString());
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        String log = sw.toString();
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        System.out.println(log);
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        if (rc != 0) {
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            throw new Exception("compilation failed: rc=" + rc);
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        }
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        String expect = "[search path for class files:";
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        long count =
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                new BufferedReader(new StringReader(log))
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                        .lines()
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                        .filter(line -> line.startsWith(expect))
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                        .count();
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        if (count != 1) {
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            throw new Exception("expected '" + expect + "' to appear once, actual: " + count);
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        }
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    }
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}
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