Running 'testthat.R' [43s/84s]
Running the tests in 'tests/testthat.R' failed.
Complete output:
  > library(testthat)
  > library(codemetar)
  > 
  > test_check("codemetar")
  -- 1. Error: we can validate this file (@test-codemeta_validate.R#5)  ----------
  Package jsonld required. Please install before re-trying.
  1: testthat::expect_true(codemeta_validate("codemeta_test.json")) at testthat/test-codemeta_validate.R:5
  2: quasi_label(enquo(object), label)
  3: eval_bare(get_expr(quo), get_env(quo))
  4: codemeta_validate("codemeta_test.json")
  5: stop("Package jsonld required. Please install before re-trying.")
  
  -- 2. Error: (unknown) (@test-frame.R#4)  --------------------------------------
  package or namespace load failed for 'jsonld' in dyn.load(file, DLLpath = DLLpath, ...):
   unable to load shared object '/home/hornik/tmp/R.check/r-devel-clang/Work/build/Packages/V8/libs/V8.so':
    libv8.so.3.14.5: cannot open shared object file: No such file or directory
  1: library("jsonld") at testthat/test-frame.R:4
  2: tryCatch({
         attr(package, "LibPath") <- which.lib.loc
         ns <- loadNamespace(package, lib.loc)
         env <- attachNamespace(ns, pos = pos, deps, exclude, include.only)
     }, error = function(e) {
         P <- if (!is.null(cc <- conditionCall(e))) 
             paste(" in", deparse(cc)[1L])
         else ""
         msg <- gettextf("package or namespace load failed for %s%s:\n %s", sQuote(package), 
             P, conditionMessage(e))
         if (logical.return) 
             message(paste("Error:", msg), domain = NA)
         else stop(msg, call. = FALSE, domain = NA)
     })
  3: tryCatchList(expr, classes, parentenv, handlers)
  4: tryCatchOne(expr, names, parentenv, handlers[[1L]])
  5: value[[3L]](cond)
  6: stop(msg, call. = FALSE, domain = NA)
  
  == testthat results  ===========================================================
  OK: 132 SKIPPED: 16 FAILED: 2
  1. Error: we can validate this file (@test-codemeta_validate.R#5) 
  2. Error: (unknown) (@test-frame.R#4) 
  
  Error: testthat unit tests failed
  Execution halted