@Test(expected = ArithmeticException.class)
// ... due to some kind of number overflow.
public void
test_Multiplication_Of_MinSupportingLongValue_And_2_WithExpecting_ArithmeticException() {
final long arg1 = Long.MIN_VALUE;
final long arg2 = 2;
calculatorUnderTest.mul(arg1, arg2);
}
@Test
public void test_Multiplication_Of_Negative_And_Zero_Numbers() {
final long arg1 = -7;
final long arg2 = 0;
long result = calculatorUnderTest.mul(arg1, arg2);
long expectedResult = 0;
assertEquals(expectedResult, result);
}
@Test
public void test_Multiplication_Of_Two_Positive_Numbers() {
final long arg1 = 2;
final long arg2 = 3;
long result = calculatorUnderTest.mul(arg1, arg2);
long expectedResult = 6;
assertEquals(expectedResult, result);
}