@@ -0,0 +1,476 @@
+package math;%0A%0Aimport org.junit.Rule;%0Aimport org.junit.Test;%0Aimport org.junit.rules.ExpectedException;%0A%0Apublic class OperatorsSpec %7B%0A%09%0A%09@Rule%0A%09public ExpectedException exception = ExpectedException.none();%0A%09%0A%09@Test%0A%09public void whenProductOfCalledWithDiffereningLengthExceptionThrown() %7B%0A%09%09double%5B%5D data1 = new double%5B%5D %7B3.0, 5.0%7D;%0A%09%09double%5B%5D data2 = new double%5B%5D %7B4.0, 5.0, 6.0%7D;%0A%09%09exception.expect(IllegalArgumentException.class);%0A%09%09Operators.productOf(data1, data2);%0A%09%7D%0A%0A%7D%0A

Add OperatorsSpec and math test package.