started pytests

tests/test_sequence.py

@@ -0,0 +1,70 @@
+from __future__ import annotations
+
+from typing import Any
+
+from hooked_containers.sequence import HookedList
+
+
+def get_id(a: Any):
+    return str(hex(id(a)))
+
+
+class TestHookedList:
+    class TestConstruction:
+        def test_empty(self):
+            lst = HookedList(None, existing=[])
+            assert list(lst) == []
+
+        def test_with_items(self):
+            lst = HookedList(None, existing=[1, 2, 3])
+            assert list(lst) == [1, 2, 3]
+
+        def test_recreation(self):
+            initial = [1, 2, 3]
+            initial_id = id(initial)
+
+            lst = HookedList(None, existing=initial)
+            assert id(lst._data) == initial_id
+
+            lst2 = HookedList(None, existing=lst)
+            assert id(lst2._data) == initial_id
+
+    class TestSeqOps:
+        def test_len(self):
+            lst = HookedList(None, existing=[1, 2, 3])
+            assert len(lst) == 3
+
+        def test_getitem(self):
+            lst = HookedList(None, existing=[1, 2, 3])
+            assert lst[0] == 1
+            assert lst[1] == 2
+            assert lst[-1] == 3
+
+        def test_contains(self):
+            lst = HookedList(None, existing=[1, 2, 3])
+            assert 2 in lst
+            assert 4 not in lst
+
+        def test_iter(self):
+            lst = HookedList(None, existing=[1, 2, 3])
+            for i, item in enumerate(lst, start=1):
+                assert item == i
+
+    class TestMutableOps:
+        def test_setitem(self):
+            added = []
+            lst = HookedList(lambda e: added.append(e.item), existing=[1, 2, 3])
+            lst[0] = 10
+            lst.append(20)
+            assert list(lst) == [10, 2, 3, 20]
+            assert added == [10, 20]
+
+        def test_delitem(self):
+            lst = HookedList(None, existing=[1, 2, 3])
+            del lst[1]
+            assert list(lst) == [1, 3]
+
+        def test_insert(self):
+            lst = HookedList(None, existing=[1, 3])
+            lst.insert(1, 2)
+            assert list(lst) == [1, 2, 3]