Integer Arithmetic

The computer relies on arithmetic. Here we test a variety of arithmetic operations expressed as 32 bit two's complement binary numbers (Java's int).
 
eg.ArithmeticFixture
x y + - * /
0 0 0 0 0 0: ArithmeticException: / by zero
1 2 3 -1 2 0.5
1 -1 0 2 -1 -1
10000 10000 20000 0 100000000 1
100000 100000 200000 0 10000000000 1
1000000 1000000 2000000 0 1000000000000 1


Now we try something similar using automatic type conversion offered by ColumnFixtures (BFL1).

eg.ArithmeticColumnFixture
x y plus() times() divide() floating()
2 3 5 6 0 0.666666666667
0 0 0 0 error error
0 0 0 0 error error
200 300 500 60000 0 0.666666666667
2 3 10 expected
5 actual		 10 expected
6 actual		 10 expected
null actual
200 3 5 expected
203 actual		 6 expected
600 actual		 0 expected
66 actual		 0.6666667 expected
66.666666666667 actual
2 -3 -1 -6 0 -0.666666666667


fit.Summary
counts 41 right, 7 wrong, 0 ignored, 1 exceptions
run date October 10 2017 19:15:58.
run elapsed time 0.018419027328491 seconds

Document prepaired by Ward Cunningham
First Version July 11, 2002
Last Update August 17, 2002