1 files changed, 45 insertions, 0 deletions
diff --git a/coin-sums/cs-test.scm b/coin-sums/cs-test.scm
new file mode 100644
index 0000000..30fe65c
--- /dev/null
+++ b/coin-sums/cs-test.scm
@@ -0,0 +1,45 @@
+;; -*- compile-command: "guile -L . cs-test.scm"; -*-
+(use-modules (srfi srfi-64)
+             (cs))
+
+
+(test-begin "harness")
+
+(define den '(1))
+
+(test-equal "make one from ones"
+  '(1)
+  (cs 1 den))
+
+(test-equal "make two from ones"
+  '(1 1)
+  (cs 2 den))
+
+(set! den '(1 2))
+
+(test-equal "make one from ones, twos"
+  '(1)
+  (cs 1 den))
+
+(test-equal "make two from ones, twos"
+  '(1 2)
+  (cs 2 den))
+
+(set! den '(2 3 5))
+
+(test-equal "make 3 from twos, threes, fives"
+  '(0 1 1)
+  (cs 3 den))
+
+(test-equal "make 5 from twos, threes, fives"
+  '(0 1 1 1 2)
+  (cs 5 den))
+
+(set! den '(1 2 5 10 20 50 100 200))
+
+(test-equal "make 8 from pence"
+  '(1 2 2 3 4 5 6 7 8 11 12 15 16)
+  (cs 13 den))
+
+
+(test-end "harness")