Update cypress data to have random id, missing value fields and unique field

[ananzh]

Description

• Random id generation in TestDataGenerator

function generateRandomId(length = 20) {
  return Array.from({ length }, () => ID_CHARS[Math.floor(Math.random() * ID_CHARS.length)]).join(
    ''
  );
}

• Add a unique field to test modifyColumnsOnSwitch

There is an advanced settings for discover called modifyColumnsOnSwitch. By default (turn on), this settings will remove columns that are not available in the new index pattern when switch. Therefore we need a different field for time_1 data and time_2 data.

• Update mapping and include a never present field to test hide missing values

There is another feature called hide missing values in discover. An example to verify this feature

PUT a
{
  "mappings": {
    "properties": {
      "field_always_present": {
        "type": "keyword"
      },
      "field_always_missing": {
        "type": "keyword"
      }
    }
  }
}
PUT a/_doc/1
{
  "field_always_present": "hello",
}
PUT a/_doc/2
{
  "field_always_present": "hello"
} 

then create an index pattern a*. For field_always_missing field, it only has a mapping but no value. When hide missing values in discover is on, you won't see this field in the side panel in discover. When hide missing values is off this field should show in side panel. So we need to update the script to include such field but don't need to create values for them.

Issues Resolved

NA

Screenshot

NA

Testing the changes

Changelog

• test: Update cypress data to have random id, missing value fields and unique field

Check List

• All tests pass
  • yarn test:jest
  • yarn test:jest_integration
• New functionality includes testing.
• New functionality has been documented.
• Update CHANGELOG.md
• Commits are signed per the DCO using --signoff

[github-actions]

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 61.71%. Comparing base (0da7752) to head (722eae0).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #9321   +/-   ##
=======================================
  Coverage   61.70%   61.71%           
=======================================
  Files        3816     3816           
  Lines       91829    91829           
  Branches    14543    14543           
=======================================
+ Hits        56666    56668    +2     
+ Misses      31507    31506    -1     
+ Partials     3656     3655    -1     

Flag	Coverage Δ
Linux_1	28.99% <ø> (ø)
Linux_2	56.46% <ø> (ø)
Linux_3	39.18% <ø> (+<0.01%)	⬆️
Linux_4	28.90% <ø> (ø)
Windows_1	29.00% <ø> (ø)
Windows_2	56.41% <ø> (ø)
Windows_3	39.18% <ø> (ø)
Windows_4	28.90% <ø> (ø)

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[opensearch-trigger-bot]

The backport to 2.x failed:

The process '/usr/bin/git' failed with exit code 128

To backport manually, run these commands in your terminal:

# Navigate to the root of your repository
cd $(git rev-parse --show-toplevel)
# Fetch latest updates from GitHub
git fetch
# Create a new working tree
git worktree add ../.worktrees/OpenSearch-Dashboards/backport-2.x 2.x
# Navigate to the new working tree
pushd ../.worktrees/OpenSearch-Dashboards/backport-2.x
# Create a new branch
git switch --create backport/backport-9321-to-2.x
# Cherry-pick the merged commit of this pull request and resolve the conflicts
git cherry-pick -x --mainline 1 13408e1d47d9decd9c85f30db4169d3c0b1db1a2
# Push it to GitHub
git push --set-upstream origin backport/backport-9321-to-2.x
# Go back to the original working tree
popd
# Delete the working tree
git worktree remove ../.worktrees/OpenSearch-Dashboards/backport-2.x

Then, create a pull request where the base branch is 2.x and the compare/head branch is backport/backport-9321-to-2.x.