R Under development (unstable) (2023-12-09 r85665 ucrt) -- "Unsuffered Consequences"
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Platform: x86_64-w64-mingw32/x64

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> library("matrixStats")
> 
> rowCumsums_R <- function(x, ..., useNames = NA) {
+   suppressWarnings({
+     y <- t(apply(x, MARGIN = 1L, FUN = cumsum))
+   })
+   
+   # Preserve dimnames attribute?
+   dim(y) <- dim(x)
+   dimnames(y) <- if (isTRUE(useNames)) dimnames(x) else NULL
+ 
+   y
+ }
> 
> 
> # - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
> # Subsetted tests
> # - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
> source("utils/validateIndicesFramework.R")
> x <- matrix(runif(6 * 6, min = -3, max = 3), nrow = 6, ncol = 6)
> storage.mode(x) <- "integer"
> 
> # To check dimnames attribute
> dimnames <- list(letters[1:6], LETTERS[1:6])
> 
> # Test with and without dimnames on x
> for (setDimnames in c(TRUE, FALSE)) {
+   if (setDimnames) dimnames(x) <- dimnames
+   else dimnames(x) <- NULL
+   for (rows in index_cases) {
+     for (cols in index_cases) {
+       # Check names attribute
+       for (useNames in c(if (!matrixStats:::isUseNamesNADefunct()) NA, TRUE, FALSE)) {
+         validateIndicesTestMatrix(x, rows, cols,
+                                   ftest = rowCumsums, fsure = rowCumsums_R, useNames = useNames)
+         validateIndicesTestMatrix(x, rows, cols,
+                                   ftest = function(x, rows, cols, ..., useNames) {
+           t(colCumsums(t(x), rows = cols, cols = rows, useNames = useNames))
+         }, fsure = rowCumsums_R, useNames = useNames)
+       }
+     }
+   }
+ }
> 
> proc.time()
   user  system elapsed 
   1.00    0.04    1.03