Use regexp instead of split-map-join (#7206)

* Use regexp instead of split-map-join * Rename constant
jestjs · Oct 18, 2018 · 7ef22a9 · 7ef22a9
1 parent 7d5de68
commit 7ef22a9
Showing 1 changed file with 2 additions and 4 deletions.
diff --git a/packages/jest-message-util/src/index.js b/packages/jest-message-util/src/index.js
@@ -63,12 +63,10 @@ const STACK_TRACE_COLOR = chalk.dim;
 const STACK_PATH_REGEXP = /\s*at.*\(?(\:\d*\:\d*|native)\)?/;
 const EXEC_ERROR_MESSAGE = 'Test suite failed to run';
 const ERROR_TEXT = 'Error: ';
+const NOT_EMPTY_LINE_REGEXP = /^(?!$)/gm;
 
 const indentAllLines = (lines: string, indent: string) =>
-  lines
-    .split('\n')
-    .map(line => (line ? indent + line : line))
-    .join('\n');
+  lines.replace(NOT_EMPTY_LINE_REGEXP, indent);
 
 const trim = string => (string || '').trim();