repl: deprecate REPLServer.prototype.memory

This method is only useful for the internal mechanics of the REPLServer
and does not need to be exposed in user space. It was previously not
documented, so I believe a Runtime deprecation makes sense.

PR-URL: https://github.com/nodejs/node/pull/16242
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Jeremiah Senkpiel <fishrock123@rocketmail.com>

1 files changed, 15 insertions, 0 deletions

diff --git a/test/parallel/test-repl-memory-deprecation.js b/test/parallel/test-repl-memory-deprecation.js
new file mode 100644
index 0000000000..9993360a28
--- /dev/null
+++ b/test/parallel/test-repl-memory-deprecation.js
@@ -0,0 +1,15 @@
+'use strict';
+const common = require('../common');
+const assert = require('assert');
+const repl = require('repl');
+
+testMemory();
+
+function testMemory() {
+  const server = repl.start({ prompt: '> ' });
+  const warn = 'REPLServer.memory() is deprecated';
+
+  common.expectWarning('DeprecationWarning', warn);
+  assert.strictEqual(server.memory(), undefined);
+  server.close();
+}