[8.x] [kbn-test] Jest run script should use `testPathPattern&#x6…

…0; to lookup config (#206341) (#206356)

# Backport

This will backport the following commits from `main` to `8.x`:
- [[kbn-test] Jest run script should use `testPathPattern` to
lookup config (#206341)](#206341)

<!--- Backport version: 9.4.3 -->

### Questions ?
Please refer to the [Backport tool
documentation](https://github.com/sqren/backport)

<!--BACKPORT [{"author":{"name":"Nick
Partridge","email":"[email protected]"},"sourceCommit":{"committedDate":"2025-01-10T23:27:05Z","message":"[kbn-test]
Jest run script should use `testPathPattern` to lookup config
(#206341)\n\nAdds logic to support the jest vscode extension by reading
the\r\n`--testPathPattern` arg for the purpose of config lookup. This
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Jest run script should use `testPathPattern` to lookup
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Jest run script should use `testPathPattern` to lookup config
(#206341)\n\nAdds logic to support the jest vscode extension by reading
the\r\n`--testPathPattern` arg for the purpose of config lookup. This
enables\r\nrunning tests easily in the vscode jest
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Jest run script should use `testPathPattern` to lookup config
(#206341)\n\nAdds logic to support the jest vscode extension by reading
the\r\n`--testPathPattern` arg for the purpose of config lookup. This
enables\r\nrunning tests easily in the vscode jest
extension.","sha":"481b8037d609e2d7a994e7696e2fa23f7b44f2b9"}}]}]
BACKPORT-->

Co-authored-by: Nick Partridge <[email protected]>

packages/kbn-test/src/jest/run.ts

@@ -79,6 +79,11 @@ export function runJest(configName = 'jest.config.js') {
 
   if (!argv.config) {
     testFiles = argv._.map((p) => resolve(cwd, p.toString()));
+
+    if (argv.testPathPattern) {
+      testFiles.push(argv.testPathPattern);
+    }
+
     const commonTestFiles = commonBasePath(testFiles);
     const testFilesProvided = testFiles.length > 0;
 
@@ -123,7 +128,7 @@ export function runJest(configName = 'jest.config.js') {
         );
       } else {
         log.error(
-          `we no longer ship a root config file so you either need to pass a path to a test file, a folder where tests can be found, or a --config argument pointing to one of the many ${configName} files in the repository`
+          `we no longer ship a root config file so you either need to pass a path to a test file, a folder where tests can be found, a --testPathPattern argument pointing to a file/directory or a --config argument pointing to one of the many ${configName} files in the repository`
         );
       }