Add basic pytest suite

pyproject.toml

@@ -52,4 +52,9 @@ dtop = "dtop.main:main"
 include = ["dtop*"]
 
 [tool.setuptools.package-data]
-dtop = ["utils/normalize_logs.py"]
+dtop = ["utils/normalize_logs.py"]
+
+[tool.pytest.ini_options]
+addopts = "-ra"
+testpaths = ["tests"]
+python_files = ["test_*.py"]

tests/test_basic.py

@@ -0,0 +1,53 @@
+import types
+import datetime
+import pytest
+from dtop.core.docker_tui import DockerTUI
+
+class DummyContainer:
+    def __init__(self, id, name, image_tags=None, status='running'):
+        self.id = id
+        self.name = name
+        self.image = types.SimpleNamespace(tags=image_tags or [])
+        self.status = status
+        self.attrs = {
+            'Created': '2024-01-01T00:00:00Z',
+            'State': {
+                'Running': status == 'running',
+                'StartedAt': '2024-01-01T00:00:00Z'
+            }
+        }
+
+class DummyClient:
+    def __init__(self, containers):
+        self.containers = types.SimpleNamespace(list=lambda all=True: containers)
+
+@pytest.fixture
+def dummy_tui(monkeypatch):
+    containers = [
+        DummyContainer('1', 'alpha', ['img1'], 'running'),
+        DummyContainer('2', 'bravo', ['img2'], 'exited')
+    ]
+    monkeypatch.setattr('docker.from_env', lambda: DummyClient(containers))
+    monkeypatch.setattr('dtop.core.stats.schedule_stats_collection_sync', lambda *a, **k: None)
+    return DockerTUI()
+
+def test_fetch_containers(dummy_tui):
+    conts = dummy_tui.fetch_containers()
+    assert len(conts) == 2
+    assert {c.name for c in conts} == {'alpha', 'bravo'}
+
+def test_sort_containers(dummy_tui):
+    containers = dummy_tui.fetch_containers()
+    dummy_tui.sort_column = 0  # NAME
+    sorted_list = dummy_tui.sort_containers(containers)
+    assert [c.name for c in sorted_list] == ['alpha', 'bravo']
+
+from dtop.utils.utils import format_bytes, format_datetime
+
+def test_format_bytes():
+    assert format_bytes(1024) == '1.0KB'
+    assert format_bytes(1048576) == '1.0MB'
+
+def test_format_datetime():
+    iso = '2024-05-05T12:34:56Z'
+    assert format_datetime(iso) == '2024-05-05 12:34:56'