test: test non-buffer/string with zlib

Check the error condition testing for passing something other than a
string or buffer. Currently, there are no tests for this.

PR-URL: #8350
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed By: James M Snell <jasnell@gmail.com>
Reviewed-By: Сковорода Никита Андреевич <chalkerx@gmail.com>

test/parallel/test-zlib-not-string-or-buffer.js

@@ -0,0 +1,19 @@
+'use strict';
+
+// Check the error condition testing for passing something other than a string
+// or buffer.
+
+require('../common');
+const assert = require('assert');
+const zlib = require('zlib');
+
+const expected = /^TypeError: Not a string or buffer$/;
+
+assert.throws(() => { zlib.deflateSync(undefined); }, expected);
+assert.throws(() => { zlib.deflateSync(null); }, expected);
+assert.throws(() => { zlib.deflateSync(true); }, expected);
+assert.throws(() => { zlib.deflateSync(false); }, expected);
+assert.throws(() => { zlib.deflateSync(0); }, expected);
+assert.throws(() => { zlib.deflateSync(1); }, expected);
+assert.throws(() => { zlib.deflateSync([1, 2, 3]); }, expected);
+assert.throws(() => { zlib.deflateSync({foo: 'bar'}); }, expected);