def test_process_env(self):
        """
        Test that process inherits system environment correctly
        """
        temp_folder = tempfile.mkdtemp()

        script_file = os.path.join(temp_folder, 'process_env.sh')
        with open(script_file, 'wt') as f:
            f.write('echo $my_var')

        os.chmod(script_file, 0o775)

        def std_out(ba):
            std_out.val += ba.data().decode('UTF-8')

        std_out.val = ''

        def std_err(ba):
            std_err.val += ba.data().decode('UTF-8')

        std_err.val = ''

        # environment variable not set:
        p = QgsBlockingProcess('sh', [script_file])
        p.setStdOutHandler(std_out)
        p.setStdErrHandler(std_err)

        f = QgsFeedback()
        self.assertEqual(p.run(f), 0)
        self.assertEqual(p.exitStatus(), QProcess.NormalExit)
        self.assertFalse(std_out.val.strip())
        self.assertFalse(std_err.val.strip())

        # set environment variable
        os.environ['my_var'] = 'my test variable'
        std_out.val = ''
        std_err.val = ''
        p = QgsBlockingProcess('sh', [script_file])
        p.setStdOutHandler(std_out)
        p.setStdErrHandler(std_err)

        f = QgsFeedback()
        self.assertEqual(p.run(f), 0)
        self.assertEqual(p.exitStatus(), QProcess.NormalExit)
        self.assertEqual(std_out.val.strip(), 'my test variable')
        self.assertFalse(std_err.val.strip())

        # test python changing path

        script_file = os.path.join(temp_folder, 'process_env_path.sh')
        with open(script_file, 'wt') as f:
            f.write('echo $PATH')

        prev_path_val = os.getenv('PATH')
        new_path = "{}{}{}".format('/my_test/folder', os.pathsep,
                                   prev_path_val)
        os.environ['PATH'] = new_path

        std_out.val = ''
        std_err.val = ''
        p = QgsBlockingProcess('sh', [script_file])
        p.setStdOutHandler(std_out)
        p.setStdErrHandler(std_err)

        f = QgsFeedback()
        self.assertEqual(p.run(f), 0)
        self.assertEqual(p.exitStatus(), QProcess.NormalExit)
        self.assertEqual(std_out.val.strip(), new_path)
        self.assertFalse(std_err.val.strip())