add attribution and mark tests as flaky

Author: KhafraDev

test/web-platform-tests/expectation.json

@@ -1927,8 +1927,7 @@
             },
             {
               "name": "Fetch with POST with text body on 421 response should be retried once on new connection.",
-              "success": false,
-              "message": "promise_test: Unhandled rejection with value: object \"TypeError: fetch failed\""
+              "flaky": true
             },
             {
               "name": "Streaming upload shouldn't work on Http/1.1.",
@@ -4868,7 +4867,7 @@
             {
               "name": "Consume response's body: from FormData to blob",
               "success": false,
-              "message": "assert_equals: Blob body type should be computed from the response Content-Type expected \"multipart/form-data; boundary=----formdata-undici-028084995963\" but got \"multipart/form-data;boundary=----formdata-undici-028084995963\""
+              "message": "assert_equals: Blob body type should be computed from the response Content-Type expected \"multipart/form-data; boundary=----formdata-undici-039669715930\" but got \"multipart/form-data;boundary=----formdata-undici-039669715930\""
             },
             {
               "name": "Consume response's body: from FormData to text",
@@ -15128,7 +15127,7 @@
           {
             "name": "Response with Cache-Control: max-age=2592000, public and Pragma: no-cache should be cached",
             "success": false,
-            "message": "assert_equals: Responses should be identical, indicating caching expected \"Timestamp: 1756760263.1691139\" but got \"Timestamp: 1756760263.166111\""
+            "message": "assert_equals: Responses should be identical, indicating caching expected \"Timestamp: 1756761942.1472726\" but got \"Timestamp: 1756761942.1442726\""
           }
         ]
       },
@@ -24888,7 +24887,7 @@
           {
             "name": "Second fetch returns same response",
             "success": false,
-            "message": "assert_equals: expected \"qjnujnescwumzwmkdmeb\" but got \"akzcmcgmxybqdbvnafyf\""
+            "message": "assert_equals: expected \"qnjgwbsjgufbkfakqkyp\" but got \"rvzexnqkvavhpvmyzpux\""
           }
         ]
       },
@@ -39734,8 +39733,7 @@
           "cases": [
             {
               "name": "clean close should be clean",
-              "success": false,
-              "message": "assert_true: readable should be closed expected true got false"
+              "flaky": true
             },
             {
               "name": "close frame with no body should result in status code 1005",

test/web-platform-tests/wpt-runner.mjs

@@ -1,3 +1,5 @@
+// Copyright 2018-2025 the Deno authors. MIT license.
+
 import { spawn } from 'node:child_process'
 import { readFileSync, writeFileSync, existsSync } from 'node:fs'
 import { join } from 'node:path'
@@ -169,11 +171,22 @@ function updateExpectations (results) {
     // Set the expectation based on test result
     current[filename] = {
       success: result.status === 0, // If test file itself did not error
-      cases: result.cases.map((c) => ({
-        name: c.name,
-        success: c.status === 0,
-        message: c.message ?? undefined
-      }))
+      cases: result.cases.map((c) => {
+        const currentCase = current[filename]?.cases.find((cc) => cc.name === c.name)
+
+        if (currentCase?.flaky) {
+          return {
+            name: c.name,
+            flaky: true
+          }
+        }
+
+        return {
+          name: c.name,
+          success: c.status === 0,
+          message: c.message ?? undefined
+        }
+      })
     }
   }
 
@@ -498,7 +511,6 @@ switch (command) {
     await setup()
     break
   case 'run':
-    // TODO: find what's causing the unsettled top-level await
     await run(filters)
     break
   default: