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 * 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.

 *

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import java.time.Instant;

import java.time.ZoneId;

import java.time.ZonedDateTime;

import java.util.Locale;

import java.util.logging.Level;

import java.util.logging.LogRecord;

import java.util.logging.SimpleFormatter;

/**

 * @test

 * @bug 8072645

 * @summary tests that SimpleFormatter can print out dates with the new

 *                nanosecond precision.

 * @run main/othervm SimpleFormatterNanos

 * @author danielfuchs

 */

public class SimpleFormatterNanos {

    static final int MILLIS_IN_SECOND = 1000;

    static final int NANOS_IN_MILLI = 1000_000;

    static final int NANOS_IN_MICRO = 1000;

    static final int NANOS_IN_SECOND = 1000_000_000;

    static final boolean verbose = true;

    static final class TestAssertException extends RuntimeException {

        TestAssertException(String msg) { super(msg); }

    }

    private static void assertEquals(long expected, long received, String msg) {

        if (expected != received) {

            throw new TestAssertException("Unexpected result for " + msg

                    + ".\n\texpected: " + expected

                    +  "\n\tactual:   " + received);

        } else if (verbose) {

            System.out.println("Got expected " + msg + ": " + received);

        }

    }

    static int getNanoAdjustment(LogRecord record) {

        return record.getInstant().getNano() % NANOS_IN_MILLI;

    }

    static void setNanoAdjustment(LogRecord record, int nanos) {

        record.setInstant(Instant.ofEpochSecond(record.getInstant().getEpochSecond(),

                (record.getInstant().getNano() / NANOS_IN_MILLI) * NANOS_IN_MILLI + nanos));

    }

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

        Locale.setDefault(Locale.ENGLISH);

        LogRecord record = new LogRecord(Level.INFO, "Java Version: {0}");

        record.setLoggerName("test");

        record.setParameters(new Object[] {System.getProperty("java.version")});

        int nanos = getNanoAdjustment(record);

        long millis = record.getMillis();

        // make sure we don't have leading zeros when printing below

        // the second precision

        if (millis % MILLIS_IN_SECOND < 100) millis = millis + 100;

        // make sure we have some nanos

        if (nanos % NANOS_IN_MICRO == 0) nanos = nanos + 999;

        record.setMillis(millis);

        setNanoAdjustment(record, nanos);

        final Instant instant = record.getInstant();

        if (nanos < 0) {

            throw new RuntimeException("Unexpected negative nano adjustment: "

                    + getNanoAdjustment(record));

        }

        if (nanos >= NANOS_IN_MILLI) {

            throw new RuntimeException("Nano adjustment exceeds 1ms: "

                    + getNanoAdjustment(record));

        }

        if (millis != record.getMillis()) {

            throw new RuntimeException("Unexpected millis: " + millis + " != "

                    + record.getMillis());

        }

        if (millis != record.getInstant().toEpochMilli()) {

            throw new RuntimeException("Unexpected millis: "

                    + record.getInstant().toEpochMilli());

        }

        ZonedDateTime zdt = ZonedDateTime.ofInstant(instant, ZoneId.systemDefault());

        int zdtNanos = zdt.getNano();

        long expectedNanos = (millis % MILLIS_IN_SECOND) * NANOS_IN_MILLI + nanos;

        assertEquals(expectedNanos, instant.getNano(), "Instant.getNano()");

        assertEquals(expectedNanos, zdtNanos, "ZonedDateTime.getNano()");

        String match = "."+expectedNanos+" ";

        System.out.println("Testing with default format...");

        SimpleFormatter formatter = new SimpleFormatter();

        String str = formatter.format(record);

        if (str.contains(match)) {

            throw new RuntimeException("SimpleFormatter.format()"

                    + " string contains unexpected nanos: "

                    + "\n\tdid not expect match for: '" + match + "'"

                    + "\n\tin: " + str);

        }

        System.out.println("Nanos omitted as expected: no '"+match+"' in "+str);

        System.out.println("Changing format to print nanos...");

        System.setProperty("java.util.logging.SimpleFormatter.format",

                "%1$tb %1$td, %1$tY %1$tl:%1$tM:%1$tS.%1$tN %1$Tp %2$s%n%4$s: %5$s%6$s%n");

        SimpleFormatter formatter2 = new SimpleFormatter();

        str = formatter2.format(record);

        if (!str.contains(match)) {

            throw new RuntimeException("SimpleFormatter.format()"

                    + " string does not contain expected nanos: "

                    + "\n\texpected match for: '" + match + "'"

                    + "\n\tin: " + str);

        }

        System.out.println("Found expected match for '"+match+"' in "+str);

        System.out.println("Changing format to omit nanos...");

        System.setProperty("java.util.logging.SimpleFormatter.format",

                "%1$tb %1$td, %1$tY %1$tl:%1$tM:%1$tS %1$Tp %2$s%n%4$s: %5$s%6$s%n");

        SimpleFormatter formatter3 = new SimpleFormatter();

        str = formatter3.format(record);

        String notMatch = match;

        if (str.contains(notMatch)) {

            throw new RuntimeException("SimpleFormatter.format()"

                    + " string contains unexpected nanos: "

                    + "\n\tdid not expect match for: '" + notMatch + "'"

                    + "\n\tin: " + str);

        }

        System.out.println("Nanos omitted as expected: no '"+notMatch+"' in "+str);

    }

}