test: disable colors in test-assert-checktag.js

When test/parallel/test-assert-checktag.js is run with a TTY as stdout, color codes in assertion messages cause the test to fail. This commit disables colors when stdout is a TTY. PR-URL: #20695 Reviewed-By: Rich Trott <[email protected]> Reviewed-By: Trivikram Kamat <[email protected]> Reviewed-By: Daniel Bevenius <[email protected]> Reviewed-By: Luigi Pinca <[email protected]> Reviewed-By: James M Snell <[email protected]>
nodejs · May 22, 2018 · 0d28b4b · 0d28b4b
1 parent dccbc3a
commit 0d28b4b
Showing 1 changed file with 6 additions and 0 deletions.
diff --git a/test/parallel/test-assert-checktag.js b/test/parallel/test-assert-checktag.js
@@ -2,6 +2,12 @@
 require('../common');
 const assert = require('assert');
 
+// Disable colored output to prevent color codes from breaking assertion
+// message comparisons. This should only be an issue when process.stdout
+// is a TTY.
+if (process.stdout.isTTY)
+  process.env.NODE_DISABLE_COLORS = '1';
+
 // Turn off no-restricted-properties because we are testing deepEqual!
 /* eslint-disable no-restricted-properties */