tests: setup test infrastructure

Setup test infrastructure, populate it with a simple test of
get_systemd_version function.

Signed-off-by: Adam Trhon <[email protected]>

Author: adam-trhon

.gitignore

@@ -1,3 +1,5 @@
 /build
 *.egg-info
 __pycache__
+.tox
+*.eggs/README.txt

dev-requirements.txt

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+pytest
+labgrid

tests/conftest.py

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+import pytest
+
+from labgrid.driver.fake import FakeCommandDriver
+from labgrid import Target
+
+
+@pytest.fixture
+def command():
+    t = Target("dummy")
+    d = FakeCommandDriver(t, "command")
+    t.activate(d)
+    return d

tests/test_linux.py

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+from labgridhelper import linux
+
+def test_get_systemd_version(command, monkeypatch):
+    systemd_version = 'systemd 249 (249.5-2-arch)\n+PAM +AUDIT -SELINUX\n'
+
+    monkeypatch.setattr(command, 'run_check', lambda cmd: [systemd_version])
+
+    assert linux.get_systemd_version(command) == 249

tox.ini

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+[tox]
+envlist = py35, py36, py37
+
+[testenv]
+deps = -rdev-requirements.txt
+commands = pytest tests {posargs}