Running ‘testthat.R’ [6s/9s]
Running the tests in ‘tests/testthat.R’ failed.
Complete output:
  > library(testthat)
  > library(caret)
  Loading required package: lattice
  Loading required package: ggplot2
  > 
  > test_check("caret")
   ----------- FAILURE REPORT -------------- 
   --- failure: the condition has length > 1 ---
   --- srcref --- 
  : 
   --- package (from environment) --- 
  caret
   --- call from context --- 
  FUN(X[[i]], ...)
   --- call from argument --- 
  if (class(A) == "try-error") stop("Cannot compute the covariance matrix")
   --- R stacktrace ---
  where 1: FUN(X[[i]], ...)
  where 2: lapply(x, getStats)
  where 3: structure(list(values = lapply(x, getStats), classes = classLabels, 
      cuts = cuts, pca = pca, call = match.call(), p = p, n = unlist(lapply(x, 
          nrow))), class = "classDist")
  where 4: classDist.default(x, y, pca = FALSE)
  where 5 at testthat/test_classDist.R#24: classDist(x, y, pca = FALSE)
  where 6: eval(code, test_env)
  where 7: eval(code, test_env)
  where 8: withCallingHandlers({
      eval(code, test_env)
      if (!handled && !is.null(test)) {
          skip_empty()
      }
  }, expectation = handle_expectation, skip = handle_skip, warning = handle_warning, 
      message = handle_message, error = handle_error)
  where 9: doTryCatch(return(expr), name, parentenv, handler)
  where 10: tryCatchOne(expr, names, parentenv, handlers[[1L]])
  where 11: tryCatchList(expr, names[-nh], parentenv, handlers[-nh])
  where 12: doTryCatch(return(expr), name, parentenv, handler)
  where 13: tryCatchOne(tryCatchList(expr, names[-nh], parentenv, handlers[-nh]), 
      names[nh], parentenv, handlers[[nh]])
  where 14: tryCatchList(expr, classes, parentenv, handlers)
  where 15: tryCatch(withCallingHandlers({
      eval(code, test_env)
      if (!handled && !is.null(test)) {
          skip_empty()
      }
  }, expectation = handle_expectation, skip = handle_skip, warning = handle_warning, 
      message = handle_message, error = handle_error), error = handle_fatal, 
      skip = function(e) {
      })
  where 16: test_code(desc, code, env = parent.frame())
  where 17 at testthat/test_classDist.R#18: test_that("Object matches expectations - factor y", {
      trainSet <- sample(1:150, 100)
      x = iris[trainSet, 1:4]
      y = iris$Species[trainSet]
      distData <- classDist(x, y, pca = FALSE)
      expect_true(length(distData$values) == length(levels(y)))
      expect_true(all(distData$classes %in% levels(y)))
      expect_true(all(table(y) == distData$n))
      expect_null(distData$cuts)
      expect_true(distData$p == ncol(x))
      expect_null(distData$pca)
      distData2 <- classDist(x, y, pca = TRUE)
      PCA <- prcomp(x, center = TRUE, scale = TRUE, tol = sqrt(.Machine$double.eps))
      expect_true(all(distData2$pca$sdev == PCA$sdev))
      expect_true(all(distData2$pca$rotation == PCA$rotation))
  })
  where 18: eval(code, test_env)
  where 19: eval(code, test_env)
  where 20: withCallingHandlers({
      eval(code, test_env)
      if (!handled && !is.null(test)) {
          skip_empty()
      }
  }, expectation = handle_expectation, skip = handle_skip, warning = handle_warning, 
      message = handle_message, error = handle_error)
  where 21: doTryCatch(return(expr), name, parentenv, handler)
  where 22: tryCatchOne(expr, names, parentenv, handlers[[1L]])
  where 23: tryCatchList(expr, names[-nh], parentenv, handlers[-nh])
  where 24: doTryCatch(return(expr), name, parentenv, handler)
  where 25: tryCatchOne(tryCatchList(expr, names[-nh], parentenv, handlers[-nh]), 
      names[nh], parentenv, handlers[[nh]])
  where 26: tryCatchList(expr, classes, parentenv, handlers)
  where 27: tryCatch(withCallingHandlers({
      eval(code, test_env)
      if (!handled && !is.null(test)) {
          skip_empty()
      }
  }, expectation = handle_expectation, skip = handle_skip, warning = handle_warning, 
      message = handle_message, error = handle_error), error = handle_fatal, 
      skip = function(e) {
      })
  where 28: test_code(NULL, exprs, env)
  where 29: source_file(path, new.env(parent = env), chdir = TRUE, wrap = wrap)
  where 30: force(code)
  where 31: doWithOneRestart(return(expr), restart)
  where 32: withOneRestart(expr, restarts[[1L]])
  where 33: withRestarts(testthat_abort_reporter = function() NULL, force(code))
  where 34: with_reporter(reporter = reporter, start_end_reporter = start_end_reporter, 
      {
          reporter$start_file(basename(path))
          lister$start_file(basename(path))
          source_file(path, new.env(parent = env), chdir = TRUE, 
              wrap = wrap)
          reporter$.end_context()
          reporter$end_file()
      })
  where 35: FUN(X[[i]], ...)
  where 36: lapply(paths, test_file, env = env, reporter = current_reporter, 
      start_end_reporter = FALSE, load_helpers = FALSE, wrap = wrap)
  where 37: force(code)
  where 38: doWithOneRestart(return(expr), restart)
  where 39: withOneRestart(expr, restarts[[1L]])
  where 40: withRestarts(testthat_abort_reporter = function() NULL, force(code))
  where 41: with_reporter(reporter = current_reporter, results <- lapply(paths, 
      test_file, env = env, reporter = current_reporter, start_end_reporter = FALSE, 
      load_helpers = FALSE, wrap = wrap))
  where 42: test_files(paths, reporter = reporter, env = env, stop_on_failure = stop_on_failure, 
      stop_on_warning = stop_on_warning, wrap = wrap)
  where 43: test_dir(path = test_path, reporter = reporter, env = env, filter = filter, 
      ..., stop_on_failure = stop_on_failure, stop_on_warning = stop_on_warning, 
      wrap = wrap)
  where 44: test_package_dir(package = package, test_path = test_path, filter = filter, 
      reporter = reporter, ..., stop_on_failure = stop_on_failure, 
      stop_on_warning = stop_on_warning, wrap = wrap)
  where 45: test_check("caret")
  
   --- value of length: 2 type: logical ---
  [1] FALSE FALSE
   --- function from context --- 
  function (u) 
  {
      if (nrow(u) < ncol(u)) 
          stop("there must be more rows than columns for this class")
      A <- try(cov(u), silent = TRUE)
      if (class(A) == "try-error") 
          stop("Cannot compute the covariance matrix")
      A <- try(solve(A), silent = TRUE)
      if (class(A) == "try-error") 
          stop("Cannot invert the covariance matrix")
      list(means = colMeans(u, na.rm = TRUE), A = A)
  }
  <bytecode: 0x55ad24d07498>
  <environment: 0x55ad2a488810>
   --- function search by body ---
   ----------- END OF FAILURE REPORT -------------- 
  Fatal error: the condition has length > 1