exclude 'tests' folder for coverage

Author: dmlemeshko

src/dev/jest/config.js

@@ -40,7 +40,7 @@ export default {
   ],
   collectCoverageFrom: [
     'src/plugins/**/*.{ts,tsx}',
-    '!src/plugins/**/{__test__,__snapshots__,__examples__,mocks}/**/*',
+    '!src/plugins/**/{__test__,__snapshots__,__examples__,mocks,tests}/**/*',
     '!src/plugins/**/*.d.ts',
     'packages/kbn-ui-framework/src/components/**/*.js',
     '!packages/kbn-ui-framework/src/components/index.js',

x-pack/dev-tools/jest/create_jest_config.js

@@ -38,7 +38,7 @@ export function createJestConfig({ kibanaDirectory, xPackKibanaDirectory }) {
       'legacy/plugins/**/*.{js,jsx,ts,tsx}',
       'legacy/server/**/*.{js,jsx,ts,tsx}',
       'plugins/**/*.{js,jsx,ts,tsx}',
-      '!**/{__test__,__snapshots__,__examples__,integration_tests}/**',
+      '!**/{__test__,__snapshots__,__examples__,integration_tests,tests}/**',
       '!**/*.test.{js,ts,tsx}',
       '!**/flot-charts/**',
       '!**/test/**',