FiboUsingFilteringTester.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.demo2;

import java.util.Arrays;
import java.util.function.BiFunction;
import java.util.function.Function;
import java.util.stream.Stream;

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

@TestDelegator
public class FiboUsingFilteringTester implements TestSuite {

	@Parameters()
	public static Stream<Object[]> getDatas(FiboTestInterface param) {
		return Arrays
				.stream(new Object[][] { { 0, 0, null }, { 1, 1, null },
						{ 2, 1, null }, { 3, 2, null }, { 4, 3, null },
						{ 10, 55, null },
						{ -1, -1, IllegalArgumentException.class } })
				.map(TestSuite.DSL.addFieldToEachEntry(param.getMethod()))
				.map(TestSuite.DSL
						.<BiFunction<String, Object[], Boolean>> addFieldToEachEntry(FiboUsingFilteringTester::validateTestMethod));
	}

	private static boolean validateTestMethod(String name, Object parameters[]) {
		if (parameters[2] == null) {
			return "testFib".equals(name);
		}
		return "testFibException".equals(name);
	}

	@Parameter(0)
	public int x;

	@Parameter(1)
	public int y;

	@Parameter(2)
	public Class<?> expectedException;

	@Parameter(3)
	public Function<Integer, Integer> method;

	@Parameter(value = 4, filter = true)
	public BiFunction<String, Object[], Boolean> filter;

	@Test(name = "validate the fib suite : %1$s->%2$s")
	public void testFib() {
		assertThatFunction(method, x).is(y);
	}

	@Test(name = "Validate exception is %3$s for input %1$s")
	public void testFibException() {
		assertWhenFunction(method, x).throwException(
				instanceOf(expectedException));
	}

}