Running 'testthat.R' [53s/60s]
Running the tests in 'tests/testthat.R' failed.
Complete output:
  > ## load dependencies
  > library(testthat)
  > library(monotonicity)
  > 
  > ## test package separated with filter due to limited Travis-CI build time
  > test_check('monotonicity', filter = "monoBonferroni")
  == testthat results  ===========================================================
  [ OK: 4 | SKIPPED: 0 | WARNINGS: 0 | FAILED: 0 ]
  > test_check('monotonicity', filter = "monoRelation")
  == testthat results  ===========================================================
  [ OK: 26 | SKIPPED: 0 | WARNINGS: 0 | FAILED: 0 ]
  > test_check('monotonicity', filter = "monoSummary")
  == testthat results  ===========================================================
  [ OK: 0 | SKIPPED: 1 | WARNINGS: 0 | FAILED: 0 ]
  > test_check('monotonicity', filter = "monoUpDown")
  == testthat results  ===========================================================
  [ OK: 25 | SKIPPED: 0 | WARNINGS: 0 | FAILED: 0 ]
  > test_check('monotonicity', filter = "specify_decimal")
  == testthat results  ===========================================================
  [ OK: 4 | SKIPPED: 0 | WARNINGS: 0 | FAILED: 0 ]
  > test_check('monotonicity', filter = "wolak")
  == testthat results  ===========================================================
  [ OK: 0 | SKIPPED: 1 | WARNINGS: 0 | FAILED: 0 ]
  > test_check('monotonicity', filter = "matrix_conversion")
  -- 1. Failure: matrix_conversion (@test-matrix_conversion.R#17)  ---------------
  class(matrix_conversion(test_matrix)) not equal to "matrix".
  Lengths differ: 2 is not 1
  
  -- 2. Failure: matrix_conversion (@test-matrix_conversion.R#18)  ---------------
  class(matrix_conversion(test_df)) not equal to "matrix".
  Lengths differ: 2 is not 1
  
  == testthat results  ===========================================================
  [ OK: 5 | SKIPPED: 0 | WARNINGS: 0 | FAILED: 2 ]
  1. Failure: matrix_conversion (@test-matrix_conversion.R#17) 
  2. Failure: matrix_conversion (@test-matrix_conversion.R#18) 
  
  Error: testthat unit tests failed
  Execution halted