@@ -0,0 +1,420 @@
+package ru.job4j;%0A%0Aimport org.junit.Test;%0Aimport static org.hamcrest.core.Is.is;%0Aimport static org.junit.Assert.assertThat;%0A%0A/**.%0A*%0A* @author Anton Vasilyuk%0A* @version 1.0%0A* @since 0.1%0A*/%0Apublic class FactorialTest %7B%0A%0A%09/**.%0A%09* Test calculate factorial%0A%09*/%0A%09@Test%0A%09public void whenNumberXThenResult() %7B%0A%0A%09%09Factorial factorial = new Factorial();%0A%09%09int result = factorial.multiplFactor(3);%0A%09%09assertThat(result, is(6));%0A%09%7D%0A%7D

add file for chapter_001_4.2