[feature request] use tags for example tables for scenarios with more example tables

When I have a scenario with more example tables with different tags:

Scenario Outline: Test example
  Given Step with <param1>
  When Step with <param2>
  Then Result is <result>

@smoke
Examples:
| param1 | param2 | result |
| foo    | bar    | foobar |
| 1      | 2      | 3      |

@regression
Examples:
| param1 | param2 | result |
| abc    | def    | abcdef |
| z      | y      | z      |

I would like to run only those examples that are tagged with specific tag, for example @smoke. This is possible with pure cucumber-js, do they use different tag-expressions? According to cucumber documentation: Tags can be placed above the following Gherkin elements:

• Feature
• Scenario
• Scenario Outline
• Examples

I tried to run cucumber-js and it worked, but when running cypress with cypress-cucumber-preprocessor, I get an error: We could not detect any tests in the above file. Write some tests and re-run.

[rkrisztian]

@RitikaGhosh15 , @dankopetrovic , PR https://github.com/TheBrainFamily/cypress-cucumber-preprocessor/pull/609 opened.

@jime2003 , I think the env problem should be a separate issue report to keep things focused.

[rkrisztian]

@dankopetrovic , OK, I tried https://github.com/TheBrainFamily/cypress-cucumber-example, although it seems a bit too old. Regardless, after updating the preprocessor to the latest version, I tried to check if we can tag examples individually there and filter for those tags:

• CYPRESS_TAGS='@tagS and @tagE2' npm run test => Worked.
• npx cypress run -e TAGS='@tagS and @tagE2' => Worked.

What did not work:

$ DEBUG=true npx cypress-tags run -e TAGS='@tagS and @tagE2'
Using cypress.json configuration:
Spec files:  {cypress/integration/**/*.{feature,cypress/integration/features}}
Ignored files:  *.js
DEBUG: Found glob [ '{cypress/integration/**/*.{feature,cypress/integration/features}}' ]
DEBUG: Found tag expression [ '@tagS and @tagE2' ]
No matching tags found

=> I think the problem is with the cypress-tags script, which seems to fail to find tagged examples (it works for TAGS='@tagS), but your reported errors are different from mine. While I think it makes sense to look into the cypress-tags script and see why I got this error (which I will try), I think it would be still useful to see an example project that lets me reproduce the exact same issue you guys reported, just to be sure we are dealing with the same error.

Edit: I found the problem:

      let testFiles = !Array.isArray(cypressConf.testFiles)
        ? cypressConf.testFiles.split(",")
        : cypressConf.testFiles;

This is just plain wrong when cypressConf.testFiles is set to **/*.{feature,features}. After doing a workaround, I still get a similar error:

No matching tags found

And that is because the tag filtering script does not take examples into account. This one should be an easy fix.