R Under development (unstable) (2025-10-01 r88895 ucrt) -- "Unsuffered Consequences"
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> library(testthat)
> library(RStoolbox) 
This is version 1.0.2.2 of RStoolbox
> 
> Sys.setenv("R_TESTS" = "") ## needed to pass R CMD check: https://github.com/hadley/testthat/issues/144
> 
> test_check("RStoolbox")
Something is wrong; all the Accuracy metric values are missing:
    Accuracy       Kappa    
 Min.   : NA   Min.   : NA  
 1st Qu.: NA   1st Qu.: NA  
 Median : NA   Median : NA  
 Mean   :NaN   Mean   :NaN  
 3rd Qu.: NA   3rd Qu.: NA  
 Max.   : NA   Max.   : NA  
 NA's   :1     NA's   :1    
[ FAIL 1 | WARN 0 | SKIP 15 | PASS 530 ]

══ Skipped tests (15) ══════════════════════════════════════════════════════════
• On CRAN (15): 'test-multicore.R:6:5', 'test-multicore.R:24:5',
  'test-rasterCVA.R:15:2', 'test-rasterCVA.R:22:4', 'test-readEE.R:7:5',
  'test-rescaleImage.R:13:13', 'test-rescaleImage.R:21:5', 'test-sli.R:33:5',
  'test-superClass.R:114:17', 'test-topCor.R:15:7', 'test-unsuperClass.R:46:5',
  'test-unsuperClass.R:53:13', 'test-unsuperClass.R:66:5',
  'test-validateMap.R:20:13', 'test-validateMap.R:29:13'

══ Failed tests ════════════════════════════════════════════════════════════════
── Error ('test-superClass.R:182:3'): sampling option ──────────────────────────
Error: Stopping
Backtrace:
     ▆
  1. ├─testthat::expect_warning(...) at test-superClass.R:182:3
  2. │ └─testthat:::quasi_capture(...)
  3. │   ├─testthat (local) .capture(...)
  4. │   │ └─base::withCallingHandlers(...)
  5. │   └─rlang::eval_bare(quo_get_expr(.quo), quo_get_env(.quo))
  6. └─RStoolbox::superClass(...)
  7.   ├─caret::train(...)
  8.   └─caret:::train.formula(...)
  9.     ├─caret::train(x, y, weights = w, ...)
 10.     └─caret:::train.default(x, y, weights = w, ...)

[ FAIL 1 | WARN 0 | SKIP 15 | PASS 530 ]
Error: Test failures
Execution halted