src/test/java/com/github/sebhoss/time/FiscalDatePlusMonthsTest.java

   1 /*
   2  * Copyright © 2013 Sebastian Hoß <mail@shoss.de>
   3  * This work is free. You can redistribute it and/or modify it under the
   4  * terms of the Do What The Fuck You Want To Public License, Version 2,
   5  * as published by Sam Hocevar. See http://www.wtfpl.net/ for more details.
   6  */
   7 /*
   8  * This program is free software. It comes without any warranty, to
   9  * the extent permitted by applicable law. You can redistribute it
  10  * and/or modify it under the terms of the Do What The Fuck You Want
  11  * To Public License, Version 2, as published by Sam Hocevar. See
  12  * http://www.wtfpl.net/ for more details.
  13  */
  14 package com.github.sebhoss.time;
  15
  16 import java.time.LocalDate;
  17 import java.time.Month;
  18 import java.time.Period;
  19 import java.util.Random;
  20
  21 import com.github.sebhoss.warnings.CompilerWarnings;
  22
  23 import org.junit.Assert;
  24 import org.junit.experimental.theories.DataPoints;
  25 import org.junit.experimental.theories.Theories;
  26 import org.junit.experimental.theories.Theory;
  27 import org.junit.runner.RunWith;
  28
  29 /**
  30  * Test cases for {@link FiscalDate#plusMonths(long)}.
  31  */
  32 @RunWith(Theories.class)
  33 @SuppressWarnings(CompilerWarnings.STATIC_METHOD)
  34 public class FiscalDatePlusMonthsTest {
  35
  36     /** @see TestObjects#supportedMonths() */
  37     @DataPoints
  38     public static final Month[]     START_DATES        = TestObjects.supportedMonths();
  39
  40     /** @see TestObjects#startDates() */
  41     @DataPoints
  42     public static final LocalDate[] MONTH_START_DATES  = TestObjects.startDates();
  43
  44     /** @see TestObjects#middleDates() */
  45     @DataPoints
  46     public static final LocalDate[] MONTH_MIDDLE_DATES = TestObjects.middleDates();
  47
  48     /** The amount of months to add a given date */
  49     @DataPoints
  50     public static final int[]       ADDITIONAL_MONTHS  = { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 25, 50, 100, 5000 };
  51
  52     private static final Random     RANDOM             = new Random();
  53
  54     /** The amount of random months to add a given date */
  55     @DataPoints
  56     public static final int[]       RANDOM_MONTHS      = RANDOM.ints(100, -292275054, 292278993).toArray();
  57
  58     /**
  59      * Ensures that for any given date a number of years can be added in an early fiscal year.
  60      *
  61      * @param startDate
  62      *            The start date of the fiscal year.
  63      * @param currentDate
  64      *            The current date in a calendar year.
  65      * @param additionalMonths
  66      *            The amounts of months to add.
  67      */
  68     @Theory
  69     public void shouldAddMonthsInEarlyFiscalYear(final Month startDate, final LocalDate currentDate,
  70             final int additionalMonths) {
  71         // Given
  72         final FiscalDate fiscalDate = FiscalYears.earlyFiscalYear(startDate.getValue()).createFromCalendarDate(
  73                 currentDate);
  74
  75         // When
  76         final FiscalDate newDate = fiscalDate.plusMonths(additionalMonths);
  77
  78         // Then
  79         Assert.assertEquals(
  80                 additionalMonths,
  81                 Period.between(FiscalDatePlusMonthsTest.toLocalDate(fiscalDate),
  82                         FiscalDatePlusMonthsTest.toLocalDate(newDate)).toTotalMonths());
  83     }
  84
  85     /**
  86      * Ensures that for any given date a number of years can be added in an early fiscal year.
  87      *
  88      * @param startDate
  89      *            The start date of the fiscal year.
  90      * @param currentDate
  91      *            The current date in a calendar year.
  92      * @param additionalMonths
  93      *            The amounts of months to add.
  94      */
  95     @Theory
  96     public void shouldAddMonthsInLateFiscalYear(final Month startDate, final LocalDate currentDate,
  97             final int additionalMonths) {
  98         // Given
  99         final FiscalDate fiscalDate = FiscalYears.lateFiscalYear(startDate.getValue()).createFromCalendarDate(
 100                 currentDate);
 101
 102         // When
 103         final FiscalDate newDate = fiscalDate.plusMonths(additionalMonths);
 104
 105         // Then
 106         Assert.assertEquals(
 107                 additionalMonths,
 108                 Period.between(FiscalDatePlusMonthsTest.toLocalDate(fiscalDate),
 109                         FiscalDatePlusMonthsTest.toLocalDate(newDate)).toTotalMonths());
 110     }
 111
 112     private static LocalDate toLocalDate(final FiscalDate fiscalDate) {
 113         return LocalDate.of((int) fiscalDate.getCalendarYear(), (int) fiscalDate.getCalendarMonth(),
 114                 (int) fiscalDate.getCalendarDayOfMonth());
 115     }
 116
 117 }