| /* |
| * Copyright 2017 The Mifos Initiative. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package io.mifos.individuallending.internal.service.costcomponent; |
| |
| import io.mifos.individuallending.internal.service.schedule.Period; |
| import io.mifos.individuallending.internal.service.schedule.ScheduledCharge; |
| import org.junit.Assert; |
| import org.junit.Test; |
| import org.junit.runner.RunWith; |
| import org.junit.runners.Parameterized; |
| |
| import java.math.BigDecimal; |
| import java.time.LocalDate; |
| import java.util.*; |
| |
| import static io.mifos.individuallending.internal.service.Fixture.getPeriod; |
| import static io.mifos.individuallending.internal.service.Fixture.scheduledInterestBookingCharge; |
| |
| /** |
| * @author Myrle Krantz |
| */ |
| @RunWith(Parameterized.class) |
| public class PeriodChargeCalculatorTest { |
| |
| private static class TestCase { |
| final String description; |
| List<ScheduledCharge> scheduledCharges; |
| int precision = 20; |
| Map<Period, BigDecimal> expectedPeriodRates; |
| private BigDecimal interest; |
| |
| private TestCase(final String description) { |
| this.description = description; |
| } |
| |
| TestCase scheduledCharges(final List<ScheduledCharge> newVal) { |
| this.scheduledCharges = newVal; |
| return this; |
| } |
| |
| TestCase expectedPeriodRates(final Map<Period, BigDecimal> newVal) { |
| this.expectedPeriodRates = newVal; |
| return this; |
| } |
| |
| @Override |
| public String toString() { |
| return "TestCase{" + |
| "description='" + description + '\'' + |
| '}'; |
| } |
| |
| TestCase interest(BigDecimal newVal) { |
| this.interest = newVal; |
| return this; |
| } |
| } |
| |
| @Parameterized.Parameters |
| public static Collection testCases() { |
| final Collection<TestCase> ret = new ArrayList<>(); |
| ret.add(simpleCase()); |
| ret.add(bitOfCompoundingCase()); |
| ret.add(zeroInterestPerPeriod()); |
| return ret; |
| } |
| |
| private static TestCase simpleCase() |
| { |
| final LocalDate initialDate = LocalDate.now(); |
| final List<ScheduledCharge> scheduledCharges = new ArrayList<>(); |
| scheduledCharges.add(scheduledInterestBookingCharge(initialDate, 0, 0, 1)); |
| scheduledCharges.add(scheduledInterestBookingCharge(initialDate, 1, 1, 1)); |
| |
| final BigDecimal dailyInterestRate = BigDecimal.valueOf(0.01) |
| .divide(BigDecimal.valueOf(365.2425), 20, BigDecimal.ROUND_HALF_EVEN); |
| |
| final Map<Period, BigDecimal> expectedPeriodRates = new HashMap<>(); |
| expectedPeriodRates.put(getPeriod(initialDate, 0, 1), dailyInterestRate); |
| expectedPeriodRates.put(getPeriod(initialDate, 1, 1), dailyInterestRate); |
| |
| return new TestCase("simpleCase") |
| .interest(BigDecimal.ONE) |
| .scheduledCharges(scheduledCharges) |
| .expectedPeriodRates(expectedPeriodRates); |
| } |
| |
| private static TestCase bitOfCompoundingCase() |
| { |
| final LocalDate initialDate = LocalDate.now(); |
| final List<ScheduledCharge> scheduledCharges = new ArrayList<>(); |
| scheduledCharges.add(scheduledInterestBookingCharge(initialDate, 2, 0, 3)); |
| scheduledCharges.add(scheduledInterestBookingCharge(initialDate, 4, 2, 2)); |
| |
| final BigDecimal dailyInterestRate = BigDecimal.valueOf(0.10) |
| .divide(BigDecimal.valueOf(365.2425), 20, BigDecimal.ROUND_HALF_EVEN); |
| |
| final Map<Period, BigDecimal> expectedPeriodRates = new HashMap<>(); |
| expectedPeriodRates.put(getPeriod(initialDate, 0, 3), PeriodChargeCalculator.createCompoundedRate(dailyInterestRate, 3, 20)); |
| expectedPeriodRates.put(getPeriod(initialDate, 2, 2), PeriodChargeCalculator.createCompoundedRate(dailyInterestRate, 2, 20)); |
| |
| return new TestCase("bitOfCompoundingCase") |
| .interest(BigDecimal.TEN) |
| .scheduledCharges(scheduledCharges) |
| .expectedPeriodRates(expectedPeriodRates); |
| } |
| |
| private static TestCase zeroInterestPerPeriod() |
| { |
| final LocalDate initialDate = LocalDate.now(); |
| final List<ScheduledCharge> scheduledCharges = new ArrayList<>(); |
| scheduledCharges.add(scheduledInterestBookingCharge(initialDate, 2, 0, 3)); |
| scheduledCharges.add(scheduledInterestBookingCharge(initialDate, 4, 2, 2)); |
| |
| final Map<Period, BigDecimal> expectedPeriodRates = new HashMap<>(); |
| expectedPeriodRates.put(getPeriod(initialDate, 0, 3), BigDecimal.ZERO.setScale(20, BigDecimal.ROUND_UNNECESSARY)); |
| expectedPeriodRates.put(getPeriod(initialDate, 2, 2), BigDecimal.ZERO.setScale(20, BigDecimal.ROUND_UNNECESSARY)); |
| |
| return new TestCase("zeroInterestPerPeriod") |
| .interest(BigDecimal.ZERO) |
| .scheduledCharges(scheduledCharges) |
| .expectedPeriodRates(expectedPeriodRates); |
| } |
| |
| private final TestCase testCase; |
| |
| public PeriodChargeCalculatorTest(final TestCase testCase) { |
| this.testCase = testCase; |
| } |
| |
| @Test |
| public void getPeriodAccrualRatesTest() |
| { |
| final Map<Period, BigDecimal> periodRates = PeriodChargeCalculator.getPeriodAccrualInterestRate(testCase.interest, testCase.scheduledCharges, testCase.precision); |
| Assert.assertEquals(testCase.expectedPeriodRates, periodRates); |
| } |
| } |