(commons-statistics) branch master updated: Lower test tolerance

[aherbert]

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aherbert pushed a commit to branch master
in repository https://gitbox.apache.org/repos/asf/commons-statistics.git


The following commit(s) were added to refs/heads/master by this push:
     new 339ac12  Lower test tolerance
339ac12 is described below

commit 339ac126a2922fda05104d930995b71602b640c5
Author: Alex Herbert <aherb...@apache.org>
AuthorDate: Mon Apr 22 07:46:39 2024 +0100

    Lower test tolerance
    
    Added sporadic failure case for a sum of random 64-bit longs using
    double-precision accept.
---
 .../apache/commons/statistics/descriptive/LongSumTest.java    | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git 
a/commons-statistics-descriptive/src/test/java/org/apache/commons/statistics/descriptive/LongSumTest.java
 
b/commons-statistics-descriptive/src/test/java/org/apache/commons/statistics/descriptive/LongSumTest.java
index ff36409..3ea5010 100644
--- 
a/commons-statistics-descriptive/src/test/java/org/apache/commons/statistics/descriptive/LongSumTest.java
+++ 
b/commons-statistics-descriptive/src/test/java/org/apache/commons/statistics/descriptive/LongSumTest.java
@@ -57,7 +57,8 @@ final class LongSumTest extends 
BaseLongStatisticTest<LongSum> {
         // Floating-point sum may be inexact.
         // Currently the double sum matches on the standard test data.
         // It fails on large random data added in streamTestData().
-        return DoubleTolerances.relative(1e-13);
+        // 41-bits of precision ~ 4.5e-13
+        return DoubleTolerances.relative(0x1.0p-41);
     }
 
     @Override
@@ -88,7 +89,13 @@ final class LongSumTest extends 
BaseLongStatisticTest<LongSum> {
             // Case with relative error of 2.75E-14 compared to a double sum
             addCase(-4487066808448153496L, 7787390584347681521L, 
-7858453033172463569L, 47145713150439093L,
                 3633776039196843638L, -4341282612965864270L, 
-1485329079196125724L, 6233716229349935702L,
-                7375800655291232789L, -6937385231548425316L)
+                7375800655291232789L, -6937385231548425316L),
+            // Case with relative error of 3.72E-14 compared to a double sum
+            addCase(1762148088465390728L, -7115931862782408920L, 
-5636555954314137385L, 6430559082344489638L,
+                4114490813139260252L, 8579187161455135584L, 
7739722798844245340L, 2891970534844301876L,
+                -4237740878246353493L, -4070467815045385449L, 
-78616704962308788L, 4337904397494590309L,
+                -5978347168335833324L, 516700626540252157L, 
6376613030089653543L, -987353620073772000L,
+                -860005478611364991L, -110486665566037318L, 
-7489804585071312763L, -6181238641752885618L)
         );
     }