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).
 
ArithmeticFixture
x y + - * /
0 0 0 0 0 0
java.lang.ArithmeticException: / by zero
	at ArithmeticFixture.doCell(ArithmeticFixture.java:19)
	at Fixture.doCells(Fixture.java:84)
	at Fixture.doRow(Fixture.java:78)
	at Fixture.doRows(Fixture.java:72)
	at ArithmeticFixture.doRows(ArithmeticFixture.java:9)
	at Fixture.doTable(Fixture.java:67)
	at Fixture.doTables(Fixture.java:57)
	at Fixture.main(Fixture.java:25)
1 2 3 -1 2 0.5
java.lang.NumberFormatException: 0.5
	at java.lang.Long.parseLong(Long.java:319)
	at java.lang.Long.parseLong(Long.java:363)
	at PrimitiveFixture.parseLong(PrimitiveFixture.java:8)
	at PrimitiveFixture.equals(PrimitiveFixture.java:26)
	at ArithmeticFixture.doCell(ArithmeticFixture.java:19)
	at Fixture.doCells(Fixture.java:84)
	at Fixture.doRow(Fixture.java:78)
	at Fixture.doRows(Fixture.java:72)
	at ArithmeticFixture.doRows(ArithmeticFixture.java:9)
	at Fixture.doTable(Fixture.java:67)
	at Fixture.doTables(Fixture.java:57)
	at Fixture.main(Fixture.java:25)
1 -1 0 2 -1 -1
10000 10000 20000 0 100000000 1
100000 100000 200000 0 10000000000
1410065408		 1
1000000 1000000 2000000 0 1000000000000
-727379968		 1


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

ArithmeticColumnFixture
x y plus() times() divide()
2 3 5 6 0.666667
200 300 500 60000 0.666667
2 3 10
5		 10
6		 10
0.6666667
200 3 5
203		 6
600		 0.666667
66.666664
2 -3 -1 -6 -0.666667


Summary
script file/Users/ward/Documents/Java/Acceptance/Documents/arithmetic.html
last modifiedSat Aug 17 10:24:22 PDT 2002
this run as ofSat Aug 17 21:59:14 PDT 2002

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