TimeUtilsTest

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package org.apache.commons.compress.utils;

import static org.apache.commons.compress.utils.TimeUtils.HUNDRED_NANOS_PER_MILLISECOND;
import static org.apache.commons.compress.utils.TimeUtils.WINDOWS_EPOCH_OFFSET;
import static org.apache.commons.compress.utils.TimeUtils.ntfsTimeToDate;
import static org.apache.commons.compress.utils.TimeUtils.ntfsTimeToFileTime;
import static org.apache.commons.compress.utils.TimeUtils.toDate;
import static org.apache.commons.compress.utils.TimeUtils.toFileTime;
import static org.apache.commons.compress.utils.TimeUtils.toNtfsTime;
import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertFalse;
import static org.junit.jupiter.api.Assertions.assertNull;
import static org.junit.jupiter.api.Assertions.assertTrue;

import java.nio.file.attribute.FileTime;
import java.time.Instant;
import java.util.Date;
import java.util.stream.Stream;

import org.apache.commons.compress.archivers.sevenz.SevenZArchiveEntry;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.Arguments;
import org.junit.jupiter.params.provider.MethodSource;

public class TimeUtilsTest {

    public static Stream<Arguments> dateToNtfsProvider() {
        return Stream.of(Arguments.of("1601-01-01T00:00:00.000Z", 0), Arguments.of("1601-01-01T00:00:00.000Z", 1), Arguments.of("1600-12-31T23:59:59.999Z", -1),
                Arguments.of("1601-01-01T00:00:00.001Z", HUNDRED_NANOS_PER_MILLISECOND),
                Arguments.of("1601-01-01T00:00:00.001Z", HUNDRED_NANOS_PER_MILLISECOND + 1),
                Arguments.of("1601-01-01T00:00:00.000Z", HUNDRED_NANOS_PER_MILLISECOND - 1),
                Arguments.of("1600-12-31T23:59:59.999Z", -HUNDRED_NANOS_PER_MILLISECOND),
                Arguments.of("1600-12-31T23:59:59.999Z", -HUNDRED_NANOS_PER_MILLISECOND + 1),
                Arguments.of("1600-12-31T23:59:59.998Z", -HUNDRED_NANOS_PER_MILLISECOND - 1), Arguments.of("1970-01-01T00:00:00.000Z", -WINDOWS_EPOCH_OFFSET),
                Arguments.of("1970-01-01T00:00:00.000Z", -WINDOWS_EPOCH_OFFSET + 1),
                Arguments.of("1970-01-01T00:00:00.001Z", -WINDOWS_EPOCH_OFFSET + HUNDRED_NANOS_PER_MILLISECOND),
                Arguments.of("1969-12-31T23:59:59.999Z", -WINDOWS_EPOCH_OFFSET - 1),
                Arguments.of("1969-12-31T23:59:59.999Z", -WINDOWS_EPOCH_OFFSET - HUNDRED_NANOS_PER_MILLISECOND));
    }

    public static Stream<Arguments> fileTimeToNtfsProvider() {
        return Stream.of(Arguments.of("1601-01-01T00:00:00.0000000Z", 0), Arguments.of("1601-01-01T00:00:00.0000001Z", 1),
                Arguments.of("1600-12-31T23:59:59.9999999Z", -1), Arguments.of("1601-01-01T00:00:00.0010000Z", HUNDRED_NANOS_PER_MILLISECOND),
                Arguments.of("1601-01-01T00:00:00.0010001Z", HUNDRED_NANOS_PER_MILLISECOND + 1),
                Arguments.of("1601-01-01T00:00:00.0009999Z", HUNDRED_NANOS_PER_MILLISECOND - 1),
                Arguments.of("1600-12-31T23:59:59.9990000Z", -HUNDRED_NANOS_PER_MILLISECOND),
                Arguments.of("1600-12-31T23:59:59.9990001Z", -HUNDRED_NANOS_PER_MILLISECOND + 1),
                Arguments.of("1600-12-31T23:59:59.9989999Z", -HUNDRED_NANOS_PER_MILLISECOND - 1),
                Arguments.of("1970-01-01T00:00:00.0000000Z", -WINDOWS_EPOCH_OFFSET), Arguments.of("1970-01-01T00:00:00.0000001Z", -WINDOWS_EPOCH_OFFSET + 1),
                Arguments.of("1970-01-01T00:00:00.0010000Z", -WINDOWS_EPOCH_OFFSET + HUNDRED_NANOS_PER_MILLISECOND),
                Arguments.of("1969-12-31T23:59:59.9999999Z", -WINDOWS_EPOCH_OFFSET - 1),
                Arguments.of("1969-12-31T23:59:59.9990000Z", -WINDOWS_EPOCH_OFFSET - HUNDRED_NANOS_PER_MILLISECOND));
    }

    public static Stream<Arguments> fileTimeToUnixTimeArguments() {
        return Stream.of(Arguments.of(0L, "1970-01-01T00:00:00Z"), Arguments.of(1672141989L, "2022-12-27T11:53:09Z"),
                Arguments.of(Integer.MAX_VALUE, "2038-01-19T03:14:07Z"));
    }

    public static Stream<Arguments> truncateFileTimeProvider() {
        return Stream.of(Arguments.of("2022-05-10T18:25:33.123456789Z", "2022-05-10T18:25:33.1234567Z"),
                Arguments.of("1970-01-01T00:00:00.000000001Z", "1970-01-01T00:00:00.0000000Z"),
                Arguments.of("1970-01-01T00:00:00.000000010Z", "1970-01-01T00:00:00.0000000Z"),
                Arguments.of("1970-01-01T00:00:00.000000199Z", "1970-01-01T00:00:00.0000001Z"),
                Arguments.of("1969-12-31T23:59:59.999999999Z", "1969-12-31T23:59:59.9999999Z"),
                Arguments.of("1969-12-31T23:59:59.000000001Z", "1969-12-31T23:59:59.0000000Z"),
                Arguments.of("1969-12-31T23:59:59.000000010Z", "1969-12-31T23:59:59.0000000Z"),
                Arguments.of("1969-12-31T23:59:59.000000199Z", "1969-12-31T23:59:59.0000001Z"));
    }

    @Test
    public void testIsUnixTime() {
        assertTrue(TimeUtils.isUnixTime(null));
        assertTrue(TimeUtils.isUnixTime(FileTime.from(Instant.parse("2022-12-27T12:45:22Z"))));
        assertTrue(TimeUtils.isUnixTime(FileTime.from(Instant.parse("2038-01-19T03:14:07Z"))));
        assertTrue(TimeUtils.isUnixTime(FileTime.from(Instant.parse("1901-12-13T23:14:08Z"))));
        assertFalse(TimeUtils.isUnixTime(FileTime.from(Instant.parse("1901-12-13T03:14:08Z"))));
        assertFalse(TimeUtils.isUnixTime(FileTime.from(Instant.parse("2038-01-19T03:14:08Z"))));
        assertFalse(TimeUtils.isUnixTime(FileTime.from(Instant.parse("2099-06-30T12:31:42Z"))));
    }

    @ParameterizedTest
    @MethodSource("dateToNtfsProvider")
    public void testJavaTimeToNtfsTime(final String instant, final long ntfsTime) {
        final long ntfsMillis = Math.floorDiv(ntfsTime, HUNDRED_NANOS_PER_MILLISECOND) * HUNDRED_NANOS_PER_MILLISECOND;
        final Date parsed = Date.from(Instant.parse(instant));
        final long converted = toNtfsTime(parsed);
        assertEquals(ntfsMillis, converted);
        // ensuring the deprecated method still works
        assertEquals(converted, SevenZArchiveEntry.javaTimeToNtfsTime(parsed));
    }

    @ParameterizedTest
    @MethodSource("fileTimeToNtfsProvider")
    public void testNtfsTimeToFileTime(final String instant, final long ntfsTime) {
        final FileTime parsed = FileTime.from(Instant.parse(instant));
        assertEquals(parsed, ntfsTimeToFileTime(ntfsTime));
    }

    @ParameterizedTest
    @MethodSource("dateToNtfsProvider")
    public void testNtfsTimeToJavaTime(final String instant, final long ntfsTime) {
        final Date converted = ntfsTimeToDate(ntfsTime);
        assertEquals(Instant.parse(instant), converted.toInstant());
        // ensuring the deprecated method still works
        assertEquals(converted, SevenZArchiveEntry.ntfsTimeToJavaTime(ntfsTime));
    }

    @ParameterizedTest
    @MethodSource("fileTimeToNtfsProvider")
    public void testToDate(final String instant, final long ignored) {
        final Instant parsedInstant = Instant.parse(instant);
        final FileTime parsedFileTime = FileTime.from(parsedInstant);
        final Date parsedDate = Date.from(parsedInstant);
        assertEquals(parsedDate, toDate(parsedFileTime));
    }

    @Test
    public void testToDateNull() {
        assertNull(toDate(null));
    }

    @ParameterizedTest
    @MethodSource("dateToNtfsProvider")
    public void testToFileTime(final String instant, final long ignored) {
        final Instant parsedInstant = Instant.parse(instant);
        final FileTime parsedFileTime = FileTime.from(parsedInstant);
        final Date parsedDate = Date.from(parsedInstant);
        assertEquals(parsedFileTime, toFileTime(parsedDate));
    }

    @Test
    public void testToFileTimeNull() {
        assertNull(toFileTime(null));
    }

    @ParameterizedTest
    @MethodSource("fileTimeToNtfsProvider")
    public void testToNtfsTime(final String instant, final long ntfsTime) {
        final FileTime parsed = FileTime.from(Instant.parse(instant));
        assertEquals(ntfsTime, toNtfsTime(parsed));
    }

    @ParameterizedTest
    @MethodSource("fileTimeToUnixTimeArguments")
    public void testToUnixTime(final long expectedUnixTime, final String instant) {
        assertEquals(expectedUnixTime, TimeUtils.toUnixTime(FileTime.from(Instant.parse(instant))));
    }

    @ParameterizedTest
    @MethodSource("truncateFileTimeProvider")
    public void testTruncateToHundredNanos(final String original, final String truncated) {
        final FileTime originalTime = FileTime.from(Instant.parse(original));
        final FileTime truncatedTime = FileTime.from(Instant.parse(truncated));
        assertEquals(truncatedTime, TimeUtils.truncateToHundredNanos(originalTime));
    }

    @ParameterizedTest
    @MethodSource("fileTimeToUnixTimeArguments")
    public void testUnixTimeToFileTime(final long unixTime, final String expectedInstant) {
        assertEquals(Instant.parse(expectedInstant), TimeUtils.unixTimeToFileTime(unixTime).toInstant());
    }
}