test: fix unreliable known_issues test

`test-stdout-buffer-flush-on-exit` was not failing reliably on POSIX machines and not failing at all on Windows. Revised test fails reliably on POSIX and is skipped (in CI) on Windows where the issue does not exist. Fixes: nodejs#6527 PR-URL: nodejs#6555 Reviewed-By: Colin Ihrig <[email protected]> Reviewed-By: James M Snell <[email protected]> Reviewed-By: Anna Henningsen <[email protected]> Reviewed-By: Joao Reis <[email protected]> Reviewed-By: Santiago Gimeno <[email protected]>
bengl · May 6, 2016 · c4006dd · c4006dd
1 parent 2bceda6
commit c4006dd
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Showing 2 changed files with 31 additions and 4 deletions.
diff --git a/test/known_issues/known_issues.status b/test/known_issues/known_issues.status
@@ -0,0 +1,20 @@
+prefix known_issues
+
+# If a known issue does not apply to a platform, list the test name in the
+# appropriate section below, without ".js", followed by ": SKIP". Example:
+# sample-test                        : SKIP
+
+[true] # This section applies to all platforms
+
+[$system==win32]
+test-stdout-buffer-flush-on-exit: SKIP
+
+[$system==linux]
+
+[$system==macos]
+
+[$system==solaris]
+
+[$system==freebsd]
+
+[$system==aix]
diff --git a/test/known_issues/test-stdout-buffer-flush-on-exit.js b/test/known_issues/test-stdout-buffer-flush-on-exit.js
@@ -5,16 +5,23 @@ require('../common');
 const assert = require('assert');
 const execSync = require('child_process').execSync;
 
-const longLine = 'foo bar baz quux quuz aaa bbb ccc'.repeat(65536);
+const lineSeed = 'foo bar baz quux quuz aaa bbb ccc';
 
 if (process.argv[2] === 'child') {
+  const longLine = lineSeed.repeat(parseInt(process.argv[4], 10));
   process.on('exit', () => {
     console.log(longLine);
   });
   process.exit();
 }
 
-const cmd = `${process.execPath} ${__filename} child`;
-const stdout = execSync(cmd).toString().trim();
+[16, 18, 20].forEach((exponent) => {
+  const bigNum = Math.pow(2, exponent);
+  const longLine = lineSeed.repeat(bigNum);
+  const cmd = `${process.execPath} ${__filename} child ${exponent} ${bigNum}`;
+  const stdout = execSync(cmd).toString().trim();
+
+  assert.strictEqual(stdout, longLine, `failed with exponent ${exponent}`);
+});
+
 
-assert.strictEqual(stdout, longLine);