From 84e452f5665cbeac02f41dd30b9e43556f12b178 Mon Sep 17 00:00:00 2001 From: Sam Anthony Date: Sat, 31 Aug 2024 15:21:55 -0400 Subject: test randomness of suffix selection --- tests/stats | 10 ++++++++++ tests/stats.awk | 41 +++++++++++++++++++++++++++++++++++++++++ 2 files changed, 51 insertions(+) create mode 100644 tests/stats create mode 100644 tests/stats.awk (limited to 'tests') diff --git a/tests/stats b/tests/stats new file mode 100644 index 0000000..565405d --- /dev/null +++ b/tests/stats @@ -0,0 +1,10 @@ +a b c a b c a b c a b c a b c a b c a b c a b c a b c a b c a b d a b c a b c a b c a b c a b c a b c a b c a b c a b c a b c a b d a b c a b c a b c a b c a b c a b c a b c a b c a b c a b c a b d a b c a b c a b c a b c a b c a b c a b c a b c a b c a b c a b d a b c a b c a b c a b c a b c a b c a b c a b c a b c a b c a b d a b c a b c a b c a b c a b c a b c a b c a b c a b c a b c a b d a b c a b c a b c a b c a b c a b c a b c a b c a b c a b c a b d a b c a b c a b c 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b c a b c a b c a b c a b c a b c a b c a b c a b c a b d a b c a b c a b c a b c a b c a b c a b c a b c a b c a b c a b d a b c a b c a b c a b c a b c a b c a b c a b c a b c a b c a b d a b c a b c a b c a b c a b c a b c a b c a b c a b c a b c a b d a b c a b c a b c a b c a b c a b c a b c a b c a b c a b c a b d a b c a b c a b c a b c a b c a b c a b c a b c a b c a b c a b d a b c a b c a b c a b c a b c a b c a b c a b c a b c a b c a b d a b c a b c a b c a b c a b c a b c a b c a b c a b c a b c a b d diff --git a/tests/stats.awk b/tests/stats.awk new file mode 100644 index 0000000..35142d7 --- /dev/null +++ b/tests/stats.awk @@ -0,0 +1,41 @@ +# read input from freq -c, check that the number of c's is approximately 10 times +# the number of d's. +BEGIN { + nc = 0 + nd = 0 + # number of c's and d's + epsilon = 0.10 + # acceptable error between nc and 10*nd +} +/^c/ { nc = $2 } +/^d/ { nd = $2 } +END { + if (nc == 0) { + print "stats.awk: no c's" + exit 1 + } else if (nd == 0) { + print "stats.awk: no d's" + exit 1 + } + diff = percdiff(nc, 10*nd) + if (diff > epsilon) { + printf "difference between the number of c's (%d) and 10 times the number of d's (10*%d=%d)is too great (%.1f%% > %.1f%%)\n", + nc, nd, 10*nd, diff*100, epsilon*100 + exit 1 + } +} + +# percdiff: percent difference between a and b +function percdiff(a, b) { + return abs(a - b) / avg(a, b) +} + +function abs(x) { + if (x < 0) + return -x + return x +} + +function avg(a, b) { + return (a + b) / 2 +} \ No newline at end of file -- cgit v1.2.3