@@ -0,0 +1,530 @@
+package dkalymbaev;%0A%0Aimport org.junit.Test;%0Aimport static org.hamcrest.number.IsCloseTo.closeTo;%0Aimport static org.junit.Assert.assertThat;%0A%0A/**%0A* Created by Damir Kalymbaev.%0A*/%0A%0Apublic class TriangleTest %7B%0A%09/**%0A%09* Testing of a method of calculation of a triangle's area%0A%09*/%0A%09@Test%0A%09public void calcTriangleArea %7B%0A%09%09Point point = new Point1(0, 0);%0A%09%09Point point = new Point2(0, 4);%0A%09%09Point point = new Point3(3, 0);%0A%09%09Triangle triangle = new Triangle(Point1, Point2, Point3);%0A%09%09assertThat(Triangle.area(), closeTo(6, error));%0A%09%7D%0A%7D

add a new TriangleTest.java file