test: add extra checks in simple/test-cli-eval

test/simple/test-cli-eval.js

@@ -39,11 +39,13 @@ var filename = __filename.replace(/\\/g, '/');
 child.exec(nodejs + ' --eval 42',
     function(err, stdout, stderr) {
       assert.equal(stdout, '');
+      assert.equal(stderr, '');
     });
 
 // assert that "42\n" is written to stderr
 child.exec(nodejs + ' --eval "console.error(42)"',
     function(err, stdout, stderr) {
+      assert.equal(stdout, '');
       assert.equal(stderr, '42\n');
     });
 
@@ -54,11 +56,13 @@ child.exec(nodejs + ' --eval "console.error(42)"',
   child.exec(cmd + '42',
       function(err, stdout, stderr) {
         assert.equal(stdout, '42\n');
+        assert.equal(stderr, '');
       });
 
   child.exec(cmd + "'[]'",
       function(err, stdout, stderr) {
         assert.equal(stdout, '[]\n');
+        assert.equal(stderr, '');
       });
 });
 
@@ -84,4 +88,5 @@ child.exec(nodejs + ' -e ""', function(status, stdout, stderr) {
 child.exec(nodejs + ' -p "\\-42"',
     function(err, stdout, stderr) {
       assert.equal(stdout, '-42\n');
+      assert.equal(stderr, '');
     });