René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"test_runner: expectFailure should support a reason (like todo/skip) and a specific expected failure","articleBody":"### What is the problem this feature will solve?\n\nThe new `expectFailure` test option should:\n\n1. be consistent with `todo` and `skip` test options, supporting a string value that is its *reason*.\n\n   For example, an `expectFailure` might have `\"known issue #347\"` as its reason.\n\n2. support a way to specify the *specific* expected failure. If a test failure is not the originally expected failure, then the test should *not* pass. The simplest and most flexible way to do this is probably by specifying a RegExp that must match the expected failure message.\n\n   For example, the failure might be expected to match `/Expected values to be strictly equal:\\s+41 !== 42/`\n\nIn addition, it should support both of the above independently. It should not be either-or. \n\n\n\n\n\n\n### What is the feature you are proposing to solve the problem?\n\nOne way to meet the above requirements is as follows:\n\n```\ntest('one', {expectFailure: true}, (t) =\u003e ...) //consistent with todo/skip\n\ntest('two', {expectFailure: \"known issue #347\"}, (t) =\u003e ...) //reason string, consistent with todo/skip\n\ntest('three', {expectFailure: /\u003cerr msg pattern\u003e/}, (t) =\u003e ...)\n\ntest('four', {expectFailure: {reason: \"known issue #347\", error:/\u003cerr msg pattern\u003e/}}, (t) =\u003e ...)\n```\n\nOr perhaps an array to specify both:\n\n```\ntest('five', {expectFailure: [\"known issue #347\", /\u003cerr msg pattern\u003e/]}, (t) =\u003e ...)\n```\n\n\nAnother way is for `expectFailure` to be exactly like `todo` and `skip`, taking only a boolean or string reason, and add a separate option for a specific expected failure:\n\n```\ntest('six', {expectFailure: \"known issue #347\", expectFailureMessage:/\u003cerr msg pattern\u003e/}, (t) =\u003e ...)\n```\n\n### What alternatives have you considered?\n\n_No response_","author":{"url":"https://github.com/vassudanagunta","@type":"Person","name":"vassudanagunta"},"datePublished":"2026-01-28T18:19:36.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":0},"url":"https://github.com/61570/node/issues/61570"}