Update dependency @storybook/test-runner to ^0.20.0

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
@storybook/test-runner	^0.19.0 -> ^0.20.0

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Release Notes

storybookjs/test-runner (@​storybook/test-runner)

v0.20.0

Compare Source

Release Notes

Refactor: Align with Storybook 8.2 core package layout

This is a structural change that shouldn't really affect you. As long as you have the storybook dependency in your app (which you should), you're good! This change makes it so that the test-runner deduplicates Storybook dependencies, and therefore, slims down your node_modules size.

Feature: Run postVisit on failures (#​494)

The test-runner's postVisit hook now runs even if there are failures. This allows you to, for instance, take snapshots on component failures. You can check whether the test has failed via the hasFailure property in the context passed to the hook:

const config: TestRunnerConfig = {
  async postVisit(_page, context) {
    if(context.hasFailure) {
      console.log('problems!')
      // do a snapshot, write a log, or anything you like
    }
  },
}

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🚀 Enhancement

• Feature: Run postVisit on failures #​494 (@​yannbf)
• Align with Storybook 8.2 core package layout #​512 (@​yannbf)

📝 Documentation

• Fix tags docs #​497 (@​shilman @​yannbf)

Authors: 6

• Michael Shilman (@​shilman)
• Yann Braga (@​yannbf)

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