R Under development (unstable) (2023-07-14 r84692 ucrt) -- "Unsuffered Consequences"
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> 
> if (!requireNamespace("testthat", quietly = TRUE)) {
+   stop("The `testthat` package is not available, therefore `anticlust` cannot be tested.")
+ }
> 
> library("anticlust")
> library("testthat")
> 
> test_check("anticlust")
sym_get_col_solution(): No solution has been stored!
sym_get_col_solution(): No solution has been stored!
sym_get_col_solution(): No solution has been stored!
sym_get_col_solution(): No solution has been stored!
sym_get_col_solution(): No solution has been stored!
[ FAIL 0 | WARN 0 | SKIP 5 | PASS 5849 ]

══ Skipped tests (5) ═══════════════════════════════════════════════════════════
• On CRAN (5): 'test-distance-input.R:6:3', 'test-distance-input.R:30:3',
  'test-high-level-functions.R:6:3', 'test-high-level-functions.R:30:3',
  'test-high-level-functions.R:55:3'

[ FAIL 0 | WARN 0 | SKIP 5 | PASS 5849 ]
> 
> 
> proc.time()
   user  system elapsed 
  64.76    1.31   66.25