add tests for Box implmentation

src/algopy_testing/box.py

@@ -29,7 +29,7 @@ def __init__(
         self._type = type_
 
         # if key parameter is empty string, generate a random 32 bytes for key
-        if isinstance(key, str) and key == "":
+        if not bool(key):
             self._key = algopy.Bytes(secrets.token_bytes(32))
         else:
             self._key = (

tests/test_box.py

@@ -0,0 +1,76 @@
+from collections.abc import Generator
+
+import pytest
+from algopy_testing import arc4
+from algopy_testing.box import Box
+from algopy_testing.context import AlgopyTestContext, algopy_testing_context
+from algopy_testing.primitives.biguint import BigUInt
+from algopy_testing.primitives.bytes import Bytes
+from algopy_testing.primitives.string import String
+from algopy_testing.primitives.uint64 import UInt64
+from algopy_testing.utils import as_bytes, as_string
+
+
+@pytest.fixture()
+def context() -> Generator[AlgopyTestContext, None, None]:
+    with algopy_testing_context() as ctx:
+        yield ctx
+        ctx.reset()
+
+
+@pytest.mark.parametrize(
+    ("value_type", "key"),
+    [
+        (UInt64, ""),
+        (Bytes, b""),
+        (String, Bytes()),
+        (BigUInt, String()),
+        (arc4.String, ""),
+        (arc4.DynamicArray, b""),
+    ],
+)
+def test_box_init_without_key(
+    context: AlgopyTestContext,
+    value_type: type,
+    key: bytes | str | Bytes | String,
+) -> None:
+    box = Box(value_type, key=key)
+    assert not bool(box)
+    assert len(box.key) > 0
+    with pytest.raises(ValueError, match="Box has not been created"):
+        _ = box.value
+
+    with pytest.raises(ValueError, match="Box has not been created"):
+        _ = box.length
+
+
+@pytest.mark.parametrize(
+    ("value_type", "key"),
+    [
+        (UInt64, "key"),
+        (Bytes, b"key"),
+        (String, Bytes(b"key")),
+        (BigUInt, String("key")),
+        (arc4.String, "Key"),
+        (arc4.DynamicArray, b"Key"),
+    ],
+)
+def test_box_init_with_key(
+    context: AlgopyTestContext,
+    value_type: type,
+    key: bytes | str | Bytes | String,
+) -> None:
+    box = Box(value_type, key=key)
+    assert not bool(box)
+    assert len(box.key) > 0
+
+    key_bytes = (
+        String(as_string(key)).bytes if isinstance(key, str | String) else Bytes(as_bytes(key))
+    )
+    assert box.key == key_bytes
+
+    with pytest.raises(ValueError, match="Box has not been created"):
+        _ = box.value
+
+    with pytest.raises(ValueError, match="Box has not been created"):
+        _ = box.length