package com.blogspot.toomuchcoding.book.chapter4._4_StubbingMethodThatReturnsCustomAnswer.hamcrest;
import com.blogspot.toomuchcoding.book.chapter4.common.returningvalue.MeanTaxFactorCalculator;
import com.blogspot.toomuchcoding.book.chapter4.common.returningvalue.TaxFactorFetcher;
import com.blogspot.toomuchcoding.person.Person;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.mockito.InjectMocks;
import org.mockito.Mock;
import org.mockito.invocation.InvocationOnMock;
import org.mockito.runners.MockitoJUnitRunner;
import org.mockito.stubbing.Answer;
import static org.hamcrest.MatcherAssert.assertThat;
import static org.hamcrest.Matchers.equalTo;
import static org.mockito.BDDMockito.given;
import static org.mockito.Matchers.any;
@RunWith(MockitoJUnitRunner.class)
public class MeanTaxFactorCalculatorTest {
@Mock TaxFactorFetcher taxFactorFetcher;
@InjectMocks MeanTaxFactorCalculator systemUnderTest;
@Test
public void should_return_tax_factor_incremented_by_additional_factor_when_calculating_mean_tax_factor() {
// given
final double additionalTaxFactor = 100;
final double factorForPersonFromUndefinedCountry = 200;
given(taxFactorFetcher.getTaxFactorFor(any(Person.class))).willAnswer(new Answer<Object>() {
@Override
public Object answer(InvocationOnMock invocation) throws Throwable {
if (invocation.getArguments().length > 0) {
Person person = (Person) invocation.getArguments()[0];
if (!person.isCountryDefined()) {
return additionalTaxFactor + factorForPersonFromUndefinedCountry;
}
}
return additionalTaxFactor;
}
});
// when
double meanTaxFactor = systemUnderTest.calculateMeanTaxFactorFor(new Person());
// then
assertThat(meanTaxFactor, equalTo(additionalTaxFactor + factorForPersonFromUndefinedCountry));
}
}