Unit test error with new version of CategoricalArrays.jl

[Felix-Gauthier]

Arrow unit tests with CategoricalArrays v0.8.1 :

test results

(@v1.4) pkg> test Arrow
    Testing Arrow
Status `<path>\AppData\Local\Temp\jl_56sJoB\Manifest.toml`
  [69666777] Arrow v0.2.4
  [324d7699] CategoricalArrays v0.8.1
  [9a962f9c] DataAPI v1.3.0
  [682c06a0] JSON v0.21.0
  [e1d29d7a] Missings v0.4.3
  [69de0a69] Parsers v1.0.4
  [2a0f44e3] Base64
  [ade2ca70] Dates
  [8ba89e20] Distributed
  [9fa8497b] Future
  [b77e0a4c] InteractiveUtils
  [8f399da3] Libdl
  [37e2e46d] LinearAlgebra
  [56ddb016] Logging
  [d6f4376e] Markdown
  [a63ad114] Mmap
  [de0858da] Printf
  [9a3f8284] Random
  [9e88b42a] Serialization
  [6462fe0b] Sockets
  [2f01184e] SparseArrays
  [10745b16] Statistics
  [8dfed614] Test
  [4ec0a83e] Unicode
Test Summary:             | Pass  Total
indexing_Primitive_buffer |  260    260
Test Summary:                | Pass  Total
indexing_Primitive_construct |  260    260
Test Summary:               | Pass  Total
indexing_Primitive_setindex |  384    384
Test Summary:            | Pass  Total
indexing_Primitive_empty |    8      8
Test Summary:                     | Pass  Total
indexing_NullablePrimitive_buffer |  260    260
Test Summary:                        | Pass  Total
indexing_NullablePrimitive_construct |  260    260
Test Summary:                       | Pass  Total
indexing_NullablePrimitive_setindex |  384    384
Test Summary:                    | Pass  Total
indexing_NullablePrimitive_empty |    8      8
Test Summary:        | Pass  Total
indexing_List_buffer |   10     10
Test Summary:           | Pass  Total
indexing_List_construct |  260    260
Test Summary:       | Pass  Total
indexing_List_empty |    4      4
Test Summary:                | Pass  Total
indexing_NullableList_buffer |   12     12
Test Summary:                   | Pass  Total
indexing_NullableList_construct |  260    260
Test Summary:               | Pass  Total
indexing_NullableList_empty |    4      4
Test Summary:                | Pass  Total
indexing_BitPrimitive_buffer |   65     65
Test Summary:                   | Pass  Total
indexing_BitPrimitive_construct |  260    260
Test Summary:                        | Pass  Total
indexing_NullableBitPrimitive_buffer |   65     65
Test Summary:                           | Pass  Total
indexing_NullableBitPrimitive_construct |  260    260
Test Summary:                | Pass  Total
indexing_DictEncoding_buffer |   12     12
indexing_DictEncoding_construct: Error During Test at <path>\.julia\packages\Arrow\q3tEJ\test\indexing.jl:372
  Got exception outside of a @test
  type CategoricalPool has no field index
  Stacktrace:
   [1] getproperty(::CategoricalPool{Int64,UInt32,CategoricalValue{Int64,UInt32}}, ::Symbol) at .\Base.jl:33
   [2] getlevels(::CategoricalArray{Union{Missing, Int64},1,UInt32,Int64,CategoricalValue{Int64,UInt32},Missing}) at <path>\.julia\packages\Arrow\q3tEJ\src\dictencoding.jl:167
   [3] DictEncoding(::CategoricalArray{Union{Missing, Int64},1,UInt32,Int64,CategoricalValue{Int64,UInt32},Missing}) at <path>\.julia\packages\Arrow\q3tEJ\src\dictencoding.jl:68
   [4] top-level scope at <path>\.julia\packages\Arrow\q3tEJ\test\indexing.jl:374
   [5] top-level scope at D:\buildbot\worker\package_win64\build\usr\share\julia\stdlib\v1.4\Test\src\Test.jl:1113
   [6] top-level scope at <path>\.julia\packages\Arrow\q3tEJ\test\indexing.jl:373
   [7] include(::String) at .\client.jl:439
   [8] top-level scope at <path>\.julia\packages\Arrow\q3tEJ\test\runtests.jl:26
   [9] include(::String) at .\client.jl:439
   [10] top-level scope at none:6
   [11] eval(::Module, ::Any) at .\boot.jl:331
   [12] exec_options(::Base.JLOptions) at .\client.jl:264
   [13] _start() at .\client.jl:484

Test Summary:                   | Error  Total
indexing_DictEncoding_construct |     1      1
ERROR: LoadError: LoadError: Some tests did not pass: 0 passed, 0 failed, 1 errored, 0 broken.
in expression starting at <path>\.julia\packages\Arrow\q3tEJ\test\indexing.jl:372
in expression starting at <path>\.julia\packages\Arrow\q3tEJ\test\runtests.jl:26
ERROR: Package Arrow errored during testing

This error occurs following this change : JuliaData/CategoricalArrays.jl#253

[ExpandingMan]

Thanks, it really was not good of me to use internal fields like that. Shouldn't be too hard to fix, but I'm pretty deep in a major rewrite of this package (which so far I'm still hoping wont' depend on CategoricalArrays at all).

In the meantime, anything that doesn't involve dictionary-encoded columns should be unaffected by this.