R version 4.6.0 RC (2026-04-17 r89914 ucrt) -- "Because it was There"
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Platform: x86_64-w64-mingw32/x64

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> library(testthat)
> library(pizzarr)
pizzarr: running without zarrs backend (pure R).
For parallel I/O and cloud storage, install from r-universe:
  install.packages("pizzarr", repos = "https://zarr-developers.r-universe.dev")
> 
> test_check("pizzarr")
zarrs backend not available; http_batch_range_requests stored but not applied.
zarrs backend not available; http_batch_range_requests stored but not applied.
Install pizzarr with the zarrs backend from r-universe:

  install.packages("pizzarr", repos = "https://zarr-developers.r-universe.dev")

[ FAIL 0 | WARN 0 | SKIP 78 | PASS 1283 ]

══ Skipped tests (78) ══════════════════════════════════════════════════════════
• zarrs backend not available (73): 'test-config.R:16:3', 'test-config.R:25:3',
  'test-config.R:57:3', 'test-config.R:66:3', 'test-onload.R:26:3',
  'test-zarrs-bridge.R:8:3', 'test-zarrs-bridge.R:24:3',
  'test-zarrs-create.R:11:3', 'test-zarrs-create.R:30:3',
  'test-zarrs-create.R:45:3', 'test-zarrs-create.R:63:3',
  'test-zarrs-create.R:81:3', 'test-zarrs-create.R:95:3',
  'test-zarrs-create.R:110:3', 'test-zarrs-create.R:132:3',
  'test-zarrs-create.R:156:3', 'test-zarrs-create.R:169:3',
  'test-zarrs-create.R:190:3', 'test-zarrs-create.R:203:3',
  'test-zarrs-create.R:215:3', 'test-zarrs-create.R:229:3',
  'test-zarrs-create.R:249:3', 'test-zarrs-create.R:267:3',
  'test-zarrs-create.R:280:3', 'test-zarrs-dispatch.R:43:3',
  'test-zarrs-dispatch.R:53:3', 'test-zarrs-dispatch.R:63:3',
  'test-zarrs-dispatch.R:106:3', 'test-zarrs-gcs.R:8:3',
  'test-zarrs-gcs.R:16:3', 'test-zarrs-gcs.R:39:3', 'test-zarrs-gcs.R:70:3',
  'test-zarrs-http.R:6:3', 'test-zarrs-http.R:12:3', 'test-zarrs-http.R:36:3',
  'test-zarrs-http.R:62:3', 'test-zarrs-metadata.R:2:3',
  'test-zarrs-metadata.R:20:3', 'test-zarrs-metadata.R:39:3',
  'test-zarrs-metadata.R:54:3', 'test-zarrs-metadata.R:65:3',
  'test-zarrs-metadata.R:77:3', 'test-zarrs-metadata.R:83:3',
  'test-zarrs-retrieve.R:4:3', 'test-zarrs-retrieve.R:18:3',
  'test-zarrs-retrieve.R:34:3', 'test-zarrs-retrieve.R:50:3',
  'test-zarrs-retrieve.R:64:3', 'test-zarrs-retrieve.R:78:3',
  'test-zarrs-retrieve.R:91:3', 'test-zarrs-retrieve.R:104:3',
  'test-zarrs-retrieve.R:126:3', 'test-zarrs-retrieve.R:158:3',
  'test-zarrs-retrieve.R:192:3', 'test-zarrs-retrieve.R:216:3',
  'test-zarrs-retrieve.R:231:3', 'test-zarrs-retrieve.R:247:3',
  'test-zarrs-s3.R:6:3', 'test-zarrs-s3.R:14:3', 'test-zarrs-s3.R:30:3',
  'test-zarrs-s3.R:58:3', 'test-zarrs-store-cache.R:17:3',
  'test-zarrs-store-cache.R:32:3', 'test-zarrs-store-cache.R:46:3',
  'test-zarrs-store-cache.R:63:3', 'test-zarrs-store-cache.R:76:3',
  'test-zarrs-write.R:4:3', 'test-zarrs-write.R:20:3',
  'test-zarrs-write.R:39:3', 'test-zarrs-write.R:62:3',
  'test-zarrs-write.R:82:3', 'test-zarrs-write.R:98:3',
  'test-zarrs-write.R:132:3'
• {qs} is not installed (5): 'test-compat.R:7:5', 'test-compat.R:18:5',
  'test-compat.R:29:5', 'test-compression.R:4:5', 'test-compression.R:71:5'

[ FAIL 0 | WARN 0 | SKIP 78 | PASS 1283 ]
> 
> proc.time()
   user  system elapsed 
  18.68    3.59   23.04