osex/tests/test_symlink_script.py

import pytest

import os
import subprocess

def test_new(tmpdir):
    os.chdir(tmpdir.strpath)
    subprocess.check_call(["symlink", "source", "link"])
    assert os.path.lexists("link")
    assert os.readlink("link") == "source"

def test_absolute(tmpdir):
    os.chdir(tmpdir.strpath)
    os.makedirs(os.path.join("1", "2"))
    link = os.path.join("1", "2", "link")
    source = os.path.join(os.getcwd(), "1", "source")
    subprocess.check_call(["symlink", source, link])
    assert os.path.lexists(link)
    assert os.readlink(link) == source

def test_relative(tmpdir):
    os.chdir(tmpdir.strpath)
    os.makedirs(os.path.join("1", "2"))
    link = os.path.join("1", "2", "link")
    source = os.path.join(os.getcwd(), "1", "source")
    subprocess.check_call(["symlink", source, link, "--relative"])
    assert os.path.lexists(link)
    assert os.readlink(link) == "../source"

def test_suitable_link_exists(tmpdir):
    os.chdir(tmpdir.strpath)
    subprocess.check_call(["symlink", "source", "link"])
    assert os.path.lexists("link")
    subprocess.check_call(["symlink", "source", "link"])

def test_override_suitable_link(tmpdir, **kwargs):
    os.chdir(tmpdir.strpath)
    subprocess.check_call(["symlink", "source", "link"])
    assert os.path.lexists("link")
    subprocess.check_call(["symlink", "--override", "source", "link"])
    # no backup should have been created since the existing link
    # already had the proper target
    assert os.listdir(tmpdir.strpath) == ["link"]

def test_divergent_link_exists(tmpdir):
    os.chdir(tmpdir.strpath)
    subprocess.check_call(["symlink", "source", "link"])
    assert os.path.lexists("link")
    with pytest.raises(subprocess.CalledProcessError):
        subprocess.check_call(["symlink", "source2", "link"])

def test_dir_exists(tmpdir):
    os.chdir(tmpdir.strpath)
    os.mkdir("dir")
    assert os.path.exists("dir")
    with pytest.raises(subprocess.CalledProcessError):
        subprocess.check_call(["symlink", "source", "dir"])

def test_override_link(tmpdir):
    os.chdir(tmpdir.strpath)
    subprocess.check_call(["symlink", "source1", "link"])
    assert os.path.lexists("link")
    subprocess.check_call(["symlink", "source2", "link", "--override", "--no-backup"])
    assert os.path.lexists("link")
    assert os.readlink("link") == "source2"
    assert not os.path.lexists("link~")

def test_override_dir(tmpdir):
    os.chdir(tmpdir.strpath)
    os.mkdir("link")
    assert os.path.exists("link")
    subprocess.check_call(["symlink", "source", "link", "--override", "--no-backup"])
    assert os.path.lexists("link")
    assert os.readlink("link") == "source"
    assert not os.path.isdir("link-")

def test_backup_link(tmpdir):
    os.chdir(tmpdir.strpath)
    subprocess.check_call(["symlink", "source1", "link"])
    assert os.path.lexists("link")
    subprocess.check_call(["symlink", "source2", "link", "--override", "--backup-suffix", "~"])
    assert os.path.lexists("link")
    assert os.readlink("link") == "source2"
    assert os.path.lexists("link~")
    assert os.readlink("link~") == "source1"

def test_backup_dir(tmpdir):
    os.chdir(tmpdir.strpath)
    os.mkdir("link")
    assert os.path.exists("link")
    subprocess.check_call(["symlink", "source", "link", "--override", "--backup-suffix", "-"])
    assert os.path.lexists("link")
    assert os.readlink("link") == "source"
    assert os.path.isdir("link-")

def test_backup_multiple_links(tmpdir):
    os.chdir(tmpdir.strpath)
    # source 1
    subprocess.check_call(["symlink", "source1", "link"])
    assert os.path.lexists("link")
    # source 2
    subprocess.check_call(["symlink", "source2", "link", "--override", "--backup-suffix", "~"])
    assert os.path.lexists("link")
    assert os.readlink("link") == "source2"
    assert os.path.lexists("link~")
    assert os.readlink("link~") == "source1"
    # source 3
    subprocess.check_call(["symlink", "source3", "link", "--override", "--backup-suffix", "~"])
    assert os.path.lexists("link")
    assert os.readlink("link") == "source3"
    assert os.path.lexists("link~")
    assert os.readlink("link~") == "source1"
    assert os.path.lexists("link~1")
    assert os.readlink("link~1") == "source2"
    # source 4
    subprocess.check_call(["symlink", "source4", "link", "--override", "--backup-suffix", "~"])
    assert os.path.lexists("link")
    assert os.readlink("link") == "source4"
    assert os.path.lexists("link~")
    assert os.readlink("link~") == "source1"
    assert os.path.lexists("link~1")
    assert os.readlink("link~1") == "source2"
    assert os.path.lexists("link~2")
    assert os.readlink("link~2") == "source3"