/*
 * Copyright 2001-2023 the original author or authors.
 *
 * 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 org.easymock.samples;

import org.easymock.EasyMockSupport;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Test;

import java.math.BigDecimal;

import static org.easymock.EasyMock.*;
import static org.junit.jupiter.api.Assertions.assertEquals;

/**
 * Example of how to partially mock with actually calling a constructor
 *
 * @author Henri Tremblay
 */
public class ConstructorCalledMockTest extends EasyMockSupport {

    /**
     * Class to test and partially mock
     */
    public static abstract class TaxCalculator {

        private final BigDecimal[] values;

        public TaxCalculator(BigDecimal... values) {
            this.values = values;
        }

        protected abstract BigDecimal rate();

        public BigDecimal tax() {
            BigDecimal result = BigDecimal.ZERO;

            for (BigDecimal d : values) {
                result = result.add(d);
            }

            return result.multiply(rate());
        }
    }

    private TaxCalculator tc;

    @BeforeEach
    public void setUp() {
        tc = partialMockBuilder(TaxCalculator.class).withConstructor(BigDecimal[].class).withArgs(
                (Object) new BigDecimal[] { new BigDecimal("5"), new BigDecimal("15") }) // varargs are special since they are in fact arrays
                .createMock(); // no need to mock any methods, abstract ones are mocked by default
    }

    @AfterEach
    public void tearDown() {
        verifyAll();
    }

    @Test
    public void testTax() {

        expect(tc.rate()).andStubReturn(new BigDecimal("0.20"));
        replayAll();

        assertEquals(new BigDecimal("4.00"), tc.tax());
    }

    @Test
    public void testTax_ZeroRate() {

        expect(tc.rate()).andStubReturn(BigDecimal.ZERO);
        replayAll();

        assertEquals(BigDecimal.ZERO, tc.tax());
    }
}
