Iso8601UtilsTest.java

package com.segment.analytics.internal;


import static junit.framework.Assert.fail;
import static org.assertj.core.api.Assertions.assertThat;

import java.util.Calendar;
import java.util.Date;
import java.util.GregorianCalendar;
import java.util.TimeZone;
import java.util.concurrent.TimeUnit;
import org.junit.Before;
import org.junit.Test;


public class Iso8601UtilsTest {

  private Date date;
  private Date dateWithoutTime;
  private Date dateZeroMillis;
  private Date dateZeroSecondAndMillis;

  @Before
  public void setUp() {
    Calendar cal = new GregorianCalendar(2007, 8 - 1, 13, 19, 51, 23);
    cal.setTimeZone(TimeZone.getTimeZone("GMT"));
    cal.set(Calendar.MILLISECOND, 789);
    date = cal.getTime();
    cal.set(Calendar.MILLISECOND, 0);
    dateZeroMillis = cal.getTime();
    cal.set(Calendar.SECOND, 0);
    dateZeroSecondAndMillis = cal.getTime();

    cal = new GregorianCalendar(2007, 8 - 1, 13, 0, 0, 0);
    cal.set(Calendar.MILLISECOND, 0);
    cal.setTimeZone(TimeZone.getTimeZone("GMT"));
    dateWithoutTime = cal.getTime();
  }

  @Test
  public void format() {
    assertThat(Iso8601Utils.format(date)).isEqualTo("2007-08-13T19:51:23.789Z");
    assertThat(Iso8601Utils.format(dateWithoutTime)).isEqualTo("2007-08-13T00:00:00.000Z");
    assertThat(Iso8601Utils.format(dateZeroMillis)).isEqualTo("2007-08-13T19:51:23.000Z");
    assertThat(Iso8601Utils.format(dateZeroSecondAndMillis)).isEqualTo("2007-08-13T19:51:00.000Z");
  }

  @Test
  public void parse() {
    assertThat(Iso8601Utils.parse("2007-08-13T19:51:23.789Z")).isEqualTo(date);
    assertThat(Iso8601Utils.parse("2007-08-13T19:51:23Z")).isEqualTo(dateZeroMillis);
    assertThat(Iso8601Utils.parse("2007-08-13T21:51:23.789+02:00")).isEqualTo(date);
  }

  @Test
  public void parseShortDate() {
    assertThat(Iso8601Utils.parse("20070813T19:51:23.789Z")).isEqualTo(date);
    assertThat(Iso8601Utils.parse("20070813T19:51:23Z")).isEqualTo(dateZeroMillis);
    assertThat(Iso8601Utils.parse("20070813T21:51:23.789+02:00")).isEqualTo(date);
  }

  @Test
  public void parseShortTime() {
    assertThat(Iso8601Utils.parse("2007-08-13T195123.789Z")).isEqualTo(date);
    assertThat(Iso8601Utils.parse("2007-08-13T195123Z")).isEqualTo(dateZeroMillis);
    assertThat(Iso8601Utils.parse("2007-08-13T215123.789+02:00")).isEqualTo(date);
  }

  @Test
  public void parseShortDateTime() {
    assertThat(Iso8601Utils.parse("20070813T195123.789Z")).isEqualTo(date);
    assertThat(Iso8601Utils.parse("20070813T195123Z")).isEqualTo(dateZeroMillis);
    assertThat(Iso8601Utils.parse("20070813T215123.789+02:00")).isEqualTo(date);
  }

  @Test
  public void parseWithoutTime() {
    assertThat(Iso8601Utils.parse("2007-08-13Z")).isEqualTo(dateWithoutTime);
    assertThat(Iso8601Utils.parse("2007-08-13Z")).isEqualTo(dateWithoutTime);
    assertThat(Iso8601Utils.parse("2007-08-13Z")).isEqualTo(dateWithoutTime);
    assertThat(Iso8601Utils.parse("20070813+00:00")).isEqualTo(dateWithoutTime);
  }

  @Test
  public void parseOptional() throws java.text.ParseException {
    assertThat(Iso8601Utils.parse("2007-08-13T19:51Z")).isEqualTo(dateZeroSecondAndMillis);
    assertThat(Iso8601Utils.parse("2007-08-13T19:51Z")).isEqualTo(dateZeroSecondAndMillis);
    assertThat(Iso8601Utils.parse("2007-08-13T21:51+02:00")).isEqualTo(dateZeroSecondAndMillis);
  }

  @Test
  public void parseRfc3339Examples() throws java.text.ParseException {
    // Two digit milliseconds.
    assertThat(Iso8601Utils.parse("1985-04-12T23:20:50.52Z"))
        .isEqualTo(newDate(1985, 4, 12, 23, 20, 50, 520, 0));

    assertThat(Iso8601Utils.parse("1996-12-19T16:39:57-08:00"))
        .isEqualTo(newDate(1996, 12, 19, 16, 39, 57, 0, -8 * 60));

    // Truncated leap second.
    assertThat(Iso8601Utils.parse("1990-12-31T15:59:60-08:00"))
        .isEqualTo(newDate(1990, 12, 31, 23, 59, 59, 0, 0));

    // Truncated leap second.
    assertThat(Iso8601Utils.parse("1990-12-31T15:59:60-08:00"))
        .isEqualTo(newDate(1990, 12, 31, 15, 59, 59, 0, -8 * 60));

    // Two digit milliseconds.
    assertThat(Iso8601Utils.parse("1937-01-01T12:00:27.87+00:20"))
        .isEqualTo(newDate(1937, 1, 1, 12, 0, 27, 870, 20));
  }

  @Test
  public void fractionalSeconds() throws java.text.ParseException {
    assertThat(Iso8601Utils.parse("1970-01-01T00:00:00.9Z"))
        .isEqualTo(newDate(1970, 1, 1, 0, 0, 0, 900, 0));

    assertThat(Iso8601Utils.parse("1970-01-01T00:00:00.09Z"))
        .isEqualTo(newDate(1970, 1, 1, 0, 0, 0, 90, 0));

    assertThat(Iso8601Utils.parse("1970-01-01T00:00:00.009Z"))
        .isEqualTo(newDate(1970, 1, 1, 0, 0, 0, 9, 0));

    assertThat(Iso8601Utils.parse("1970-01-01T00:00:00.0009Z"))
        .isEqualTo(newDate(1970, 1, 1, 0, 0, 0, 0, 0));

    assertThat(Iso8601Utils.parse("1970-01-01T00:00:00.2147483647Z"))
        .isEqualTo(newDate(1970, 1, 1, 0, 0, 0, 214, 0));

    assertThat(Iso8601Utils.parse("1970-01-01T00:00:00.2147483648Z"))
        .isEqualTo(newDate(1970, 1, 1, 0, 0, 0, 214, 0));

    assertThat(Iso8601Utils.parse("1970-01-01T00:00:00.9+02:00"))
        .isEqualTo(newDate(1970, 1, 1, 0, 0, 0, 900, 2 * 60));

    assertThat(Iso8601Utils.parse("1970-01-01T00:00:00.09+02:00"))
        .isEqualTo(newDate(1970, 1, 1, 0, 0, 0, 90, 2 * 60));

    assertThat(Iso8601Utils.parse("1970-01-01T00:00:00.009+02:00"))
        .isEqualTo(newDate(1970, 1, 1, 0, 0, 0, 9, 2 * 60));

    assertThat(Iso8601Utils.parse("1970-01-01T00:00:00.0009+02:00"))
        .isEqualTo(newDate(1970, 1, 1, 0, 0, 0, 0, 2 * 60));

    assertThat(Iso8601Utils.parse("1970-01-01T00:00:00.2147483648+02:00"))
        .isEqualTo(newDate(1970, 1, 1, 0, 0, 0, 214, 2 * 60));
  }

  @Test
  public void decimalWithoutDecimalPointButNoFractionalSeconds() {
    try {
      Iso8601Utils.parse("1970-01-01T00:00:00.Z");
      fail();
    } catch (RuntimeException e) {
      assertThat(e).hasMessage("Not an RFC 3339 date: 1970-01-01T00:00:00.Z");
    }
  }

  private Date newDate(int year, int month, int day, int hour,
      int minute, int second, int millis, int timezoneOffsetMinutes) {
    Calendar calendar = new GregorianCalendar(TimeZone.getTimeZone("GMT"));
    calendar.set(year, month - 1, day, hour, minute, second);
    calendar.set(Calendar.MILLISECOND, millis);
    return new Date(calendar.getTimeInMillis() - TimeUnit.MINUTES.toMillis(timezoneOffsetMinutes));
  }
}