import os
import pytest

from unittest.mock import Mock

from g2h.file import sanitize_file_name, tree_join

def test_sanitize_not_necessary():
    assert(sanitize_file_name('foo', None) == 'foo')

def test_sanitize_success():
    assert(sanitize_file_name('.test', []) == '_test')

def test_sanitize_collissions():
    entries = []
    for i in range(1, 10):
        entry = Mock()
        entry.name = '_' * i + 'test'
        entries.append(entry)
    with pytest.raises(RuntimeError):
        sanitize_file_name('.test', entries)

def test_tree_join():
    commit = Mock()
    commit.hexsha = '123'
    assert(tree_join(commit, 'test') == os.path.join('123', 't', 'test'))