Equality test: failures => '0' is not of type integer

Describe the bug

When I run an equality test on a seed and a model/table I get the error that ‘0’ is not an integer. It works in version 0.20.2 but not anymore in 0.21.0

Steps to reproduce

Create following 3 files in corresponding folders for seeds and models. testcsv.csv

"A" 
1

test.sql select 1 as A from dual test.yml

version: 2
seeds:
  - name: testcsv
    columns:
    - name: A
    tests:
      - dbt_utils.equality:
          compare_model: ref('test')
          compare_columns:
            - A

dbt seed dbt run dbt test (–schema optionally)

Expected results

Running with dbt=0.20.2
Found 64 models, 15 tests, 0 snapshots, 0 analyses, 361 macros, 0 operations, 25 seed files, 77 sources, 0 exposures

13:36:02 | Concurrency: 2 threads (target='unittest')
13:36:02 |
13:36:02 | 1 of 1 START test dbt_utils_equality_testcsv_A__ref_test_............ [RUN]
13:36:03 | 1 of 1 PASS dbt_utils_equality_testcsv_A__ref_test_.................. [PASS in 0.17s]
13:36:03 |
13:36:03 | Finished running 1 test in 0.57s.

Completed successfully

Done. PASS=1 WARN=0 ERROR=0 SKIP=0 TOTAL=1

Actual results

Running with dbt=0.21.0
Found 64 models, 15 tests, 0 snapshots, 0 analyses, 376 macros, 0 operations, 25 seed files, 77 sources, 0 exposures

13:31:58 | Concurrency: 2 threads (target='unittest')
13:31:58 |
13:31:58 | 1 of 1 START test dbt_utils_equality_testcsv_A__ref_test_............ [RUN]
Unhandled error while executing test.dib.dbt_utils_equality_testcsv_A__ref_test_.145311c1ec
'0' is not of type 'integer'

Failed validating 'type' in schema['properties']['failures']:
    {'type': 'integer'}

On instance['failures']:
    '0'
13:31:58 | 1 of 1 ERROR dbt_utils_equality_testcsv_A__ref_test_................. [ERROR in 0.15s]
13:31:58 |
13:31:58 | Finished running 1 test in 0.49s.

Completed with 1 error and 0 warnings:

'0' is not of type 'integer'

Failed validating 'type' in schema['properties']['failures']:
    {'type': 'integer'}

On instance['failures']:
    '0'

Done. PASS=0 WARN=0 ERROR=1 SKIP=0 TOTAL=1

Screenshots and log output

Unhandled error while executing test.dib.dbt_utils_equality_expected__calc_gueltig_von_TF1_META_GUELTIG_VON__ref_calc_gueltig_von_.3c591b58f9
'0' is not of type 'integer'

Failed validating 'type' in schema['properties']['failures']:
    {'type': 'integer'}

On instance['failures']:
    '0'

System information

packages:
  - package: dbt-labs/dbt_utils
    version: 0.7.4

Which database are you using dbt with?

• [-] postgres
• [-] redshift
• [-] bigquery
• [-] snowflake
• other (specify: Exasol)

The output of dbt --version:

 dbt --version
installed version: 0.21.0
   latest version: 0.21.0

Up to date!

Plugins:

Additional context

Same dbt-exasol adapter is used in both versions.

Are you interested in contributing the fix?

I would need a hand. Can’t figure out where it goes wrong or why. I guess it failes at this place in dbt-core but since it depends on this dbt-utils.equality test I posted it here: https://github.com/dbt-labs/dbt-core/blob/719b2026ab847ab887d3638c81a351b0f6f96158/core/dbt/task/test.py#L212

Let me know if I can help any further

[TimoKruth]

Possible hacky solutions see at dbt-core Further work will be discussed at dbt-exasol

[joellabes]

In that case, I think you’d be best to open an issue on the exasol adapter, as it won’t be something that dbt-utils itself can fix. Does that sound right to you?