diff options
Diffstat (limited to 'cl/tests/maceps.lisp')
| -rw-r--r-- | cl/tests/maceps.lisp | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/cl/tests/maceps.lisp b/cl/tests/maceps.lisp new file mode 100644 index 0000000..9d61772 --- /dev/null +++ b/cl/tests/maceps.lisp @@ -0,0 +1,25 @@ +(defpackage lizfcm/tests.maceps + (:use :cl + :fiveam + :lizfcm.approx + :lizfcm.utils + :lizfcm/tests) + (:export :approx-suite)) +(in-package :lizfcm/tests.maceps) + +(def-suite maceps-suite + :in lizfcm-test-suite) +(in-suite maceps-suite) + +(test maceps + :description "double precision provides precision about (mac eps of single precision) squared" + (let* ((maceps-computation-double (compute-maceps 1.0d0 + (lambda (x) x))) + (maceps-computation-single (compute-maceps 1.0 + (lambda (x) x))) + (last-double-h (cadar (last maceps-computation-double))) + (last-single-h (cadar (last maceps-computation-single)))) + (is (within-range-p + (- last-double-h (* last-single-h last-single-h)) + 0 + last-single-h)))) |