48 lines
1.4 KiB
Common Lisp
48 lines
1.4 KiB
Common Lisp
(load "../unit/unit-tester.lisp")
|
|
(load "compound-interest.lisp")
|
|
|
|
(setq assertions (unit-tester-assertions))
|
|
|
|
(defun assert= (expected actual)
|
|
(call assertions :assert= expected actual))
|
|
|
|
(setq tests
|
|
(list
|
|
|
|
(defun many-years-with-no-interest-rate ()
|
|
(assert= 100000 (compound-interest 100000 0 10)))
|
|
|
|
(defun no-years-with-positive-interest-rate ()
|
|
(assert= 100000 (compound-interest 100000 10 0)))
|
|
|
|
(defun one-year-with-positive-interest-rate ()
|
|
(assert= 105000 (compound-interest 100000 5 1)))
|
|
|
|
(defun two-years-with-positive-interest-rate ()
|
|
(assert= 110250 (compound-interest 100000 5 2)))
|
|
|
|
(defun three-years-with-positive-interest-rate ()
|
|
(assert= 115763 (compound-interest 100000 5 3)))
|
|
|
|
(defun four-years-with-positive-interest-rate ()
|
|
(assert= 121551 (compound-interest 100000 5 4)))
|
|
|
|
(defun one-year-with-negative-interest-rate ()
|
|
(assert= 95000 (compound-interest 100000 -5 1)))
|
|
|
|
(defun two-years-with-negative-interest-rate ()
|
|
(assert= 90250 (compound-interest 100000 -5 2)))
|
|
|
|
(defun three-years-with-negative-interest-rate ()
|
|
(assert= 85737 (compound-interest 100000 -5 3)))
|
|
|
|
(defun four-years-with-negative-interest-rate ()
|
|
(assert= 81450 (compound-interest 100000 -5 4)))
|
|
|
|
(defun negative-number-of-years ()
|
|
(assert= 100000 (compound-interest 100000 5 -4)))))
|
|
|
|
|
|
(setq tester (unit-tester tests))
|
|
(call tester :run)
|