BiFunctionTesterImpl.java

/**
 * Powerunit - A JDK1.8 test framework
 * Copyright (C) 2014 Mathieu Boretti.
 *
 * This file is part of Powerunit
 *
 * Powerunit is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * Powerunit is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with Powerunit. If not, see <http://www.gnu.org/licenses/>.
 */
package ch.powerunit.bifunction.impl;

import java.util.function.BiFunction;
import java.util.stream.Stream;
import java.util.stream.Stream.Builder;

import org.hamcrest.Matcher;

import ch.powerunit.Parameter;
import ch.powerunit.Parameters;
import ch.powerunit.Test;
import ch.powerunit.TestDelegator;
import ch.powerunit.TestSuite;
import ch.powerunit.bifunction.BiFunctionTester;

/**
 * @author borettim
 *
 */
@TestDelegator
public class BiFunctionTesterImpl<T, U, R> implements TestSuite {
    @Parameters
    public static <T, U, R> Stream<Object[]> getParameters(
            BiFunctionTester<T, U, R> input) {
        Builder<Object[]> b = Stream.builder();
        for (int i = 0; i < input.getInput1().size(); i++) {
            Matcher<? super R> result = input.getResult().get(i).get();
            T param1 = input.getInput1().get(i).get();
            U param2 = input.getInput2().get(i).get();
            String name = input.getName().get(i).get();
            if ("".equals(name)) {
                name = "Passing `" + param1 + "` and `" + param2 + "`"
                        + " then " + result + " is expected";
            }
            b.add(new Object[] { name, param1, param2, result,
                    input.getUnderTest() });
        }
        return b.build();
    }

    @Parameter(0)
    public String name;

    @Parameter(1)
    public T input1;

    @Parameter(2)
    public U input2;

    @Parameter(3)
    public Matcher<? super R> expectedResult;

    @Parameter(4)
    public BiFunction<T, U, R> function;

    @Test(name = "%1$s")
    public void testFunction() {
        assertThatBiFunction(function, input1, input2).is(expectedResult);
    }
}