R Under development (unstable) (2026-02-02 r89367 ucrt) -- "Unsuffered Consequences"
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> # This file is part of the standard setup for testthat.
> # It is recommended that you do not modify it.
> #
> # Where should you do additional test configuration?
> # Learn more about the roles of various files in:
> # * https://r-pkgs.org/tests.html
> # * https://testthat.r-lib.org/reference/test_package.html#special-files
> 
> library(testthat)
> library(optrefine)
Loading required package: MASS
Loading required package: Rglpk
Loading required package: slam
Using the GLPK callable library version 5.0
Loading required package: sampling
Loading required package: ggplot2
> 
> test_check("optrefine")
100 units and 6 covariates

No stratification
---------------------- 
Treatment
 0  1 
58 42 
Average standardized mean difference across covariates and strata: 0.329
Maximum standardized mean difference across covariates and strata: 0.732 (pr)

Original stratification
---------------------- 
         Base stratum
Treatment  1  2  3  4  5
        0 17 12 11 12  6
        1  3  8  9  8 14
Average standardized mean difference across covariates and strata: 0.344
Maximum standardized mean difference across covariates and strata: 0.874 (hrt1 for stratum 2)

Refined stratification
---------------------- 
         Refined stratum
Treatment 1:1 1:2 2:1 2:2 3:1 3:2 4:1 4:2 5:1 5:2
        0   0  17   0  12   0  11   0  12   0   6
        1   0   3   0   8   0   9   0   8   0  14
Average standardized mean difference across covariates and strata: 0.344
Maximum standardized mean difference across covariates and strata: 0.874 (hrt1 for stratum 2:2)
100 units and 6 covariates

No stratification
---------------------- 
Treatment
 0  1 
58 42 
Average standardized mean difference across covariates and strata: 0.329
Maximum standardized mean difference across covariates and strata: 0.732 (pr)

Original stratification
---------------------- 
         Base stratum
Treatment  1  2  3  4  5
        0 17 12 11 12  6
        1  3  8  9  8 14
Average standardized mean difference across covariates and strata: 0.344
Maximum standardized mean difference across covariates and strata: 0.874 (hrt1 for stratum 2)

Refined stratification
---------------------- 
None
100 units and 5 covariates

No stratification
---------------------- 
Treatment
 0  1 
58 42 
Average standardized mean difference across covariates and strata: 0.248
Maximum standardized mean difference across covariates and strata: 0.71 (alb1)

Original stratification
---------------------- 
None

Refined stratification
---------------------- 
None
[ FAIL 0 | WARN 0 | SKIP 0 | PASS 120 ]
> 
> proc.time()
   user  system elapsed 
  12.78    0.82   13.59