R Under development (unstable) (2023-10-04 r85267 ucrt) -- "Unsuffered Consequences"
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> library(matrixTests)
> source("utils/capture.r")
> 
> #--- less than 2 paired observations -------------------------------------------
> 
> wrn <- 'row_t_paired: 1 of the rows had less than 2 paired observations.\nFirst occurrence at row 1'
> nacolumns <- c("stderr", "df", "statistic", "pvalue", "conf.low", "conf.high")
> 
> # 0 observations
> res <- capture(row_t_paired(NA_integer_, NA_integer_))
> stopifnot(all.equal(res$warning, wrn))
> stopifnot(all(is.na(res$value[,nacolumns])))
> stopifnot(all.equal(res$value$obs.pair, 0))
> stopifnot(all.equal(res$value$obs.x, 0))
> stopifnot(all.equal(res$value$obs.y, 0))
> 
> # 0 observations in x and 2 in y
> res <- capture(row_t_paired(c(NA_integer_, NA_integer_), 1:2))
> stopifnot(all.equal(res$warning, wrn))
> stopifnot(all(is.na(res$value[,nacolumns])))
> stopifnot(all.equal(res$value$obs.pair, 0))
> stopifnot(all.equal(res$value$obs.x, 0))
> stopifnot(all.equal(res$value$obs.y, 2))
> 
> # 1 observation
> res <- capture(row_t_paired(1, 2))
> stopifnot(all.equal(res$warning, wrn))
> stopifnot(all(is.na(res$value[,nacolumns])))
> stopifnot(all.equal(res$value$obs.pair, 1))
> stopifnot(all.equal(res$value$obs.x, 1))
> stopifnot(all.equal(res$value$obs.y, 1))
> 
> # 2 observations in x and 1 in y
> res <- capture(row_t_paired(1:2, c(1, NA_integer_)))
> stopifnot(all.equal(res$warning, wrn))
> stopifnot(all(is.na(res$value[,nacolumns])))
> stopifnot(all.equal(res$value$obs.pair, 1))
> stopifnot(all.equal(res$value$obs.x, 2))
> stopifnot(all.equal(res$value$obs.y, 1))
> 
> # 1 paired observation after removing NAs
> res <- capture(row_t_paired(c(1,2,3,NA,NA), c(NA,NA,2,1,4)))
> stopifnot(all.equal(res$warning, wrn))
> stopifnot(all(is.na(res$value[,nacolumns])))
> stopifnot(all.equal(res$value$obs.pair, 1))
> stopifnot(all.equal(res$value$obs.x, 3))
> stopifnot(all.equal(res$value$obs.y, 3))
> 
> 
> #--- constant paired values ----------------------------------------------------
> 
> wrn <- 'row_t_paired: 1 of the rows had essentially constant values.\nFirst occurrence at row 1'
> nacolumns <- c("stderr", "df", "statistic", "pvalue", "conf.low", "conf.high")
> 
> # all values are the same
> res <- capture(row_t_paired(c(1,1,1,1), c(1,1,1,1)))
> stopifnot(all.equal(res$warning, wrn))
> stopifnot(all(is.na(res$value[,nacolumns])))
> stopifnot(all.equal(res$value$var.x, 0))
> stopifnot(all.equal(res$value$var.y, 0))
> stopifnot(all.equal(res$value$var.diff, 0))
> 
> # all values are equal within each group
> res <- capture(row_t_paired(c(1,1,1,1), c(2,2,2,2)))
> stopifnot(all.equal(res$warning, wrn))
> stopifnot(all(is.na(res$value[,nacolumns])))
> stopifnot(all.equal(res$value$var.x, 0))
> stopifnot(all.equal(res$value$var.y, 0))
> stopifnot(all.equal(res$value$var.diff, 0))
> 
> # all values are equal within each group after NAs
> res <- capture(row_t_paired(c(NA,1,1,1,1,3), c(4,2,2,2,2,NA)))
> stopifnot(all.equal(res$warning, wrn))
> stopifnot(all(is.na(res$value[,nacolumns])))
> stopifnot(all.equal(res$value$var.diff, 0))
> 
> # values are equal after taking differene
> res <- capture(row_t_paired(c(3,2,0), c(2,1,-1)))
> stopifnot(all.equal(res$warning, wrn))
> stopifnot(all(is.na(res$value[,nacolumns])))
> stopifnot(all.equal(res$value$var.diff, 0))
> 
> # values are equal after taking differene with NAs
> res <- capture(row_t_paired(c(100,3,2,0,NA), c(NA,2,1,-1,-50)))
> stopifnot(all.equal(res$warning, wrn))
> stopifnot(all(is.na(res$value[,nacolumns])))
> stopifnot(all.equal(res$value$var.diff, 0))
> 
> 
> proc.time()
   user  system elapsed 
   0.26    0.00    0.20