Running 'Arguments-FILES.R'
  Running 'FileProgressBar.R'
  Running 'GString.R'
  Running 'Java.R'
  Running 'MultiVerbose.R'
  Running 'NullVerbose.R'
  Running 'Options.R'
  Running 'ProgressBar.R'
  Running 'Settings.R'
  Running 'System.R'
  Running 'TextStatusBar.R'
  Running 'VComments.R'
  Running 'Verbose.R'
  Running 'absolute-relative-paths.R'
  Running 'attachLocally.R'
  Running 'callHooks.R'
  Running 'capitalize.R'
  Running 'captureOutput.R'
  Running 'cmdArgs.R'
  Running 'colClasses.R'
  Running 'commandArgs.R'
  Running 'compressFile.R'
  Running 'compressPDF.R'
  Running 'copyRenameFile.R'
  Running 'countLines.R'
  Running 'cout.R'
  Running 'createFileAtomically.R'
  Running 'createLink.R'
  Running 'dataFrame.R'
  Running 'dimNA.R'
  Running 'displayCode.R'
  Running 'doCall.R'
  Running 'eget.R'
  Running 'egsub.R'
  Running 'env.R'
  Running 'extract.array.R'
  Running 'fileAccess.R'
  Running 'filePath.R'
  Running 'findFiles.R'
  Running 'findSourceTraceback.R'
  Running 'gcDLLs.R'
  Running 'gcat.R'
  Running 'getOption.R'
  Running 'getParent.R'
  Running 'hpaste.R'
  Running 'insert.R'
  Running 'intToHex.R'
Running the tests in 'tests/intToHex.R' failed.
Complete output:
  > library("R.utils")
  Loading required package: R.oo
  Loading required package: R.methodsS3
  R.methodsS3 v1.8.1 (2020-08-26 16:20:06 UTC) successfully loaded. See ?R.methodsS3 for help.
  R.oo v1.24.0 (2020-08-26 16:11:58 UTC) successfully loaded. See ?R.oo for help.
  
  Attaching package: 'R.oo'
  
  The following object is masked from 'package:R.methodsS3':
  
      throw
  
  The following objects are masked from 'package:methods':
  
      getClasses, getMethods
  
  The following objects are masked from 'package:base':
  
      attach, detach, load, save
  
  R.utils v2.10.1 (2020-08-26 22:50:31 UTC) successfully loaded. See ?R.utils for help.
  
  Attaching package: 'R.utils'
  
  The following object is masked from 'package:utils':
  
      timestamp
  
  The following objects are masked from 'package:base':
  
      cat, commandArgs, getOption, inherits, isOpen, nullfile, parse,
      warnings
  
  > 
  > x <- c(7, 8, 15, 16)
  > print(x)
  [1]  7  8 15 16
  > 
  > y <- intToHex(x)
  > y_truth <- c("07", "08", "0f", "10")
  > print(y)
  [1] "7"  "8"  "f"  "10"
  > stopifnot(is.character(y), all(!is.na(y)), identical(y, y_truth))
  Error: identical(y, y_truth) is not TRUE
  Execution halted