🐛 Bug Report: Background failures generate event.test.failed instead of event.test.skipped for subsequent tests

从 Gherkin Background 的失败路径以及 event.test.before、event.test.failed、event.test.skipped 和 event.test.after 入口点开始。分别复现常规 Scenario 情况和 --grep Scenario Outline 情况，并与 CodeceptJS 3.6.7 的行为进行比较。当未选中的测试或后续测试收到预期的 skipped 事件且没有重复的失败报告时，即完成。

Description

Since CodeceptJS 3.7.5, when a Background hook fails in a Gherkin feature, all tests in the same Feature file receive event.test.failed events instead of event.test.skipped. This is a breaking change from version 3.6.7 that significantly complicates result reporting and event handling.

Core Issue: When Background fails, CodeceptJS triggers event.test.failed for:

1. Tests that failed on Background ✓ (expected)
2. Subsequent tests marked as failed without ability to trigger event.test.skipped or event.test.after properly
3. Tests in the same suite file that were never meant to run (not selected by --grep)

This forces custom reporting systems to manually filter and track which tests actually executed before sending results. Previously, simple event handlers worked fine - now complex workarounds are required.

Expected Behavior (CodeceptJS 3.6.7)

When a Background fails:

• First test: receives event.test.failed
• Subsequent tests: receive event.test.skipped

// Clean event handling in 3.6.7
event.dispatcher.on(event.test.skipped, (test) => {
  // This worked for all tests after first Background failure ✅
  sendSkippedReport(test)
})

Actual Behavior (CodeceptJS 3.7.5+)

When a Background fails:

• All tests: receive event.test.failed
• event.test.skipped never fires

// Complex workaround needed in 3.7.5+
let firstBackgroundFailure = true

event.dispatcher.on(event.test.failed, (test, error) => {
  const isBackgroundFailure = test.ctx?.test?.originalTitle?.startsWith('"before each" hook:')
  
  // Manually handle what should be skipped tests
  if (isBackgroundFailure && !firstBackgroundFailure) {
    // Have to manually convert failed → skipped ❌
    sendSkippedReport(test)
    return
  }
  
  if (isBackgroundFailure) {
    firstBackgroundFailure = false
  }
})

Problems with Current Behavior

1. Semantic Incorrectness

Tests that never started executing (only Background failed) are marked as failed. Semantically, a test that didn't run should be skipped, not failed.

2. Breaking Change Without Clear Benefits

The change from 3.6.7 to 3.7.5 broke existing event handlers without providing clear advantages. All code relying on event.test.skipped for Background failures stopped working.

3. Event Generation Inconsistency

For regular Scenarios:
When Background fails on first test, subsequent tests don't trigger event.test.after, making it impossible to send reports for them:

Feature: Test
  Background:
    Given failing step
  
  Scenario: Test 1  # Background fails here
    Then something
  
  Scenario: Test 2  # event.test.after doesn't process this properly
    Then something

For Scenario Outline (running by tests, not by suites):
When using --grep to run a single test, CodeceptJS generates event.test.failed for all examples in the suite, even those from different Scenario Outlines that weren't selected:

Scenario Outline: Test
  # Background fails here
  
  Examples:
    | case |
    | A    |  # Not selected by --grep, different Scenario Outline
    | B    |  # Selected by --grep ← only this should run
    | C    |  # Not selected by --grep, different Scenario Outline

Result: All three tests (A, B, C) receive event.test.failed, even though only B was selected to run.

Key issue: event.test.before fires only for filtered tests, but event.test.failed and event.test.after fire for ALL examples, making it impossible to distinguish which tests actually ran.

4. Complex Workarounds Required

To maintain reasonable behavior, we now need:

• Track which tests actually started (event.test.before)
• Track first vs subsequent Background failures
• Manually convert failed → skipped in event.test.failed handler
• Filter out events for tests that never ran
• Initialize tracking in event.test.failed for tests where Background failed before event.test.before could fire

5. Report Analysis Difficulties

• Before: "1 failed, 5 skipped" = clear that Background failed
• After: "6 failed" = looks like 6 different failures, unclear what happened

6. Multiple Events for Same Test

When Background retry mechanism triggers (e.g., with retryFailedStep plugin), the same test receives event.test.failed multiple times, leading to duplicate reports if not handled carefully.

Steps to Reproduce

Case 1: Regular Scenarios

1. Create a feature file with Background and multiple Scenarios
2. Make Background fail
3. Observe that second test doesn't properly trigger reporting in event.test.after

Feature: Test
  Background:
    Given failing step  # ← Fails here
  
  Scenario: Test 1
    Then something
  
  Scenario: Test 2  # This won't be properly reported
    Then something

Case 2: Scenario Outline with --grep

1. Create a Scenario Outline with multiple examples
2. Run single test with --grep @TAG-B
3. Observe that ALL examples receive event.test.failed, not just the filtered one

Feature: Test
  Background:
    Given failing step  # ← Fails here
  
  Scenario Outline: Test
    Then something
    
    Examples:
      | case | tag      |
      | A    | @TAG-A   |
      | B    | @TAG-B   |  # Only this is selected
      | C    | @TAG-C   |

Expected: Only B receives events
Actual: A, B, and C all receive event.test.failed

Environment

• CodeceptJS version: 3.7.5+
• Node version: 22.4.0
• Helpers: WebDriver, Gherkin

Proposed Solution

Option 1 (Preferred): Revert to 3.6.7 behavior

• First test with Background failure → event.test.failed
• Subsequent tests → event.test.skipped

Option 2: Add new event type

• event.test.failedInBackground or similar
• Allows distinguishing Background failures from test failures
• Maintains backward compatibility

Option 3: Configuration option

// codecept.conf.js
gherkin: {
  backgroundFailureBehavior: 'skip' // or 'fail'
}

Impact

This breaking change affects:

• Custom reporting plugins
• CI/CD result analysis
• Test retry logic
• Statistics collection
• Any code relying on event.test.skipped

References

Comment in our codebase acknowledging this breaking change:

// CodeceptJS 3.6.7 → 3.7.5: tests failing in Background are now 'failed' instead of 'skipped'
// Handle Background failures as skipped to maintain compatibility

---

Would it be possible to either revert this change or provide a configuration option to restore the 3.6.7 behavior? The current implementation significantly complicates result handling and doesn't align with the semantic meaning of "skipped" vs "failed".