Revise tests

test/test_other.py

@@ -1692,13 +1692,33 @@ def test_module_stdin(self):
   def test_module_stdout_stderr(self):
     self.set_setting('FORCE_FILESYSTEM')
     create_file('pre.js', '''
+let stdout = [];
+let stderr = [];
+
+Module['stdout'] = (char) => stdout.push(char);
+Module['stderr'] = (char) => stderr.push(char);
+Module['postRun'] = () => {
+    assert(stderr.length === 0, 'stderr should be empty. \\n' +
+        'stderr: \\n' + stderr);
+    assert(UTF8ArrayToString(stdout, 0).startsWith('hello, world!'), 'stdout should start with the famous greeting. \\n' +
+        'stdout: \\n' + stdout);
+}
+''')
+    self.emcc_args += ['--pre-js', 'pre.js']
+    self.do_runf('hello_world.c')
+
+  # @also_with_noderawfs # NODERAWFS doesn't use library_tty.js for stdio streams
+  @crossplatform
+  def test_module_print_printerr(self):
+    self.set_setting('FORCE_FILESYSTEM')
+    create_file('pre.js', '''
 let stdout = '';
 let stderr = '';
 
 Module['print'] = (text) => stdout += text;
 Module['printErr'] = (text) => stderr += text;
 Module['postRun'] = () => {
-    assert(stderr == '', 'stderr should be empty. \\n' +
+    assert(stderr === '', 'stderr should be empty. \\n' +
         'stderr: \\n' + stderr);
     assert(stdout.startsWith('hello, world!'), 'stdout should start with the famous greeting. \\n' +
         'stdout: \\n' + stdout);