import os
import sys
import unittest
import tempfile
from ssh_config_utils.parser import CamelCase_to_snake

samples_dir = os.path.join(sys.path[0], "sample_configs")
CONFIG_FILES = dict(
    (file, os.path.join(samples_dir, file)) for file in os.listdir(samples_dir)
)


class ReadWriteTest(unittest.TestCase):
    def setUp(self):
        self.write_file = tempfile.TemporaryFile(mode="r+")

    def tearDown(self):
        self.write_file.close()


class TestTempFile(ReadWriteTest):
    def test_me(self):
        self.write_file.write("hello")
        self.write_file.seek(0)
        self.assertEqual(self.write_file.read(), "hello")


class TestParser(ReadWriteTest):
    def test_camel_case_to_snake_case(self):
        initial_vals = "ThisIsCamelCase", "This"
        expected_vals = "this_is_camel_case", "this"

        for initial, expected in zip(initial_vals, expected_vals):
            with self.subTest(initial=initial, expected=expected):
                self.assertEqual(CamelCase_to_snake(initial), expected)