Guard getErrorMessage suggestions by binding

[Copilot]

prefer-get-error-message could suggest getErrorMessage(err) where the helper was unavailable. Its sibling rule already avoids this through scope-aware binding resolution.

• Rule behavior

  • Port the sibling rule’s resolvability check.
  • Report only when getErrorMessage is imported, function-declared, or otherwise defined before the matched ternary.

• Coverage

  • Add a no-binding case that produces no report.
  • Retain suggestion coverage for prior CommonJS and ESM bindings.

const { getErrorMessage } = require("./error_helpers.cjs");
const message = err instanceof Error ? err.message : String(err);
// suggestion: getErrorMessage(err)

• Fixes eslint-factory: prefer-get-error-message lacks getErrorMessage resolvability check (sibling rule already has it) #54162

[Copilot]

Pull request overview

Adds binding-aware safeguards to prevent unsafe getErrorMessage suggestions.

Changes:

• Checks whether getErrorMessage is available before reporting.
• Adds negative and positive binding tests.

Show a summary per file

File	Description
prefer-get-error-message.ts	Adds scope-aware binding resolution.
prefer-get-error-message.test.ts	Covers missing, CommonJS, and ESM bindings.

Review details

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• Files reviewed: 2/2 changed files
• Comments generated: 1
• Review effort level: Balanced

[github-actions]

🎉 This pull request is included in a new release.

Release: v0.87.2