fix: testMatch not working with negations (#6648)

Author: thymikee

CHANGELOG.md

@@ -9,6 +9,7 @@
 - `[jest-snapshot` Mark snapshots as obsolete when moved to an inline snapshot ([#6773](https://github.com/facebook/jest/pull/6773))
 - `[jest-config]` Fix `--coverage` with `--findRelatedTests` overwriting `collectCoverageFrom` options ([#6736](https://github.com/facebook/jest/pull/6736))
 - `[jest-config]` Update default config for testURL from 'about:blank' to 'http://localhost' to address latest JSDOM security warning. ([#6792](https://github.com/facebook/jest/pull/6792))
+- `[jest-cli]` Fix `testMatch` not working with negations ([#6648](https://github.com/facebook/jest/pull/6648))
 
 ## 23.4.2
 

packages/jest-cli/src/SearchSource.js

@@ -47,8 +47,7 @@ const globsToMatcher = (globs: ?Array<Glob>) => {
     return () => true;
   }
 
-  const matchers = globs.map(each => micromatch.matcher(each, {dot: true}));
-  return path => matchers.some(each => each(path));
+  return path => micromatch([path], globs, {dot: true}).length > 0;
 };
 
 const regexToMatcher = (testRegex: string) => {

packages/jest-cli/src/__tests__/SearchSource.test.js

@@ -135,7 +135,7 @@ describe('SearchSource', () => {
           moduleFileExtensions: ['js', 'jsx', 'txt'],
           name,
           rootDir,
-          testMatch: ['**/not-really-a-test.txt'],
+          testMatch: ['**/not-really-a-test.txt', '!**/do-not-match-me.txt'],
           testRegex: '',
         },
         {},