R Under development (unstable) (2023-10-04 r85267 ucrt) -- "Unsuffered Consequences"
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> library(matrixTests)
> source("utils/capture.r")
> 
> #--- removing na groups --------------------------------------------------------
> 
> wrn <- '2 columns dropped due to missing group information'
> 
> # 2 NAs
> x <- 1:10
> g <- c(1,1,1,1,NA,NA,2,2,2,2)
> res <- capture(row_oneway_equalvar(x, g))
> stopifnot(all.equal(res$warning, wrn))
> stopifnot(all.equal(res$value$obs.tot, 8))
> stopifnot(all.equal(res$value$obs.groups, 2))
> 
> 
> #--- one observation per group -------------------------------------------------
> 
> wrn <- 'row_oneway_equalvar: 1 of the rows had one observation per group.\nFirst occurrence at row 1'
> nacolumns <- c("df.between", "df.within", "statistic", "pvalue")
> 
> # two groups with a single obervation each
> x <- 1:2
> g <- 1:2
> res <- capture(row_oneway_equalvar(x, g))
> stopifnot(all.equal(res$warning, wrn))
> stopifnot(all(is.na(res$value[,nacolumns])))
> stopifnot(all.equal(res$value$obs.tot, 2))
> stopifnot(all.equal(res$value$obs.groups, 2))
> 
> # 10 groups 10 observations
> x <- 1:10
> g <- 1:10
> res <- capture(row_oneway_equalvar(x, g))
> stopifnot(all.equal(res$warning, wrn))
> stopifnot(all(is.na(res$value[,nacolumns])))
> stopifnot(all.equal(res$value$obs.tot, 10))
> stopifnot(all.equal(res$value$obs.groups, 10))
> 
> # 2 groups 3 observations but one is NA
> x <- c(1:2, NA)
> g <- c("a", "b", "b")
> res <- capture(row_oneway_equalvar(x, g))
> stopifnot(all.equal(res$warning, wrn))
> stopifnot(all(is.na(res$value[,nacolumns])))
> stopifnot(all.equal(res$value$obs.tot, 2))
> stopifnot(all.equal(res$value$obs.groups, 2))
> 
> 
> #--- less than 2 groups --------------------------------------------------------
> 
> wrn <- 'row_oneway_equalvar: 1 of the rows had less than 2 groups with enough observations.\nFirst occurrence at row 1'
> nacolumns <- c("df.between", "df.within", "statistic", "pvalue")
> 
> # single group with 10 observations
> res <- capture(row_oneway_equalvar(1:10, rep(1,10)))
> stopifnot(all.equal(res$warning, wrn))
> stopifnot(all(is.na(res$value[,nacolumns])))
> stopifnot(all.equal(res$value$obs.groups, 1))
> stopifnot(all.equal(res$value$obs.tot, 10))
> 
> # 3 groups but others have only NA values
> x <- c(1:8, NA, NA)
> g <- c(rep("a", 8), "b", "c")
> res <- capture(row_oneway_equalvar(x, g))
> stopifnot(all.equal(res$warning, wrn))
> stopifnot(all(is.na(res$value[,nacolumns])))
> stopifnot(all.equal(res$value$obs.groups, 1))
> stopifnot(all.equal(res$value$obs.tot, 8))
> 
> 
> #--- single unique value -------------------------------------------------------
> 
> wrn <- 'row_oneway_equalvar: 1 of the rows had essentially constant values.\nFirst occurrence at row 1'
> nacolumns <- c("df.between", "df.within", "statistic", "pvalue")
> 
> # two groups
> res <- capture(row_oneway_equalvar(rep(1, 3), c("a","a","b")))
> stopifnot(all.equal(res$warning, wrn))
> stopifnot(all(is.na(res$value[,nacolumns])))
> stopifnot(all.equal(res$value$obs.groups, 2))
> stopifnot(all.equal(res$value$obs.tot, 3))
> 
> # two groups with NA values
> x <- c(rep(1,8),NA,NA)
> g <- c(rep("a", 4), rep("b", 4), "c", "d")
> res <- capture(row_oneway_equalvar(x, g))
> stopifnot(all.equal(res$warning, wrn))
> stopifnot(all(is.na(res$value[,nacolumns])))
> stopifnot(all.equal(res$value$obs.groups, 2))
> stopifnot(all.equal(res$value$obs.tot, 8))
> 
> 
> #--- single unique values within each group ------------------------------------
> 
> wrn <- 'row_oneway_equalvar: 1 of the rows had zero within group variance: result might be unreliable.\nFirst occurrence at row 1'
> 
> # two groups - constant values within group
> x <- c(1,1,0,0)
> g <- c(1,1,2,2)
> res <- capture(row_oneway_equalvar(x, g))
> stopifnot(all.equal(res$warning, wrn))
> stopifnot(all.equal(res$value$obs.tot, 4))
> stopifnot(all.equal(res$value$obs.groups, 2))
> 
> # three groups - constant values within each group + NAs
> x <- c(3,3,NA,0,0,NA,-1,-1,NA)
> g <- c(1,1,1,2,2,2,3,3,3)
> res <- capture(row_oneway_equalvar(x, g))
> stopifnot(all.equal(res$warning, wrn))
> stopifnot(all.equal(res$value$obs.tot, 6))
> stopifnot(all.equal(res$value$obs.groups, 3))
> 
> 
> proc.time()
   user  system elapsed 
   0.21    0.04    0.20