feat: add DEFAULT_REGION constant to constants module (BL-022)

README.md

@@ -6,4 +6,4 @@
 - **string_utils** — String manipulation utilities: slugify, truncate, case conversion (snake_case, camelCase, PascalCase), and more.
 - **math_utils** — Math utilities: clamp, lerp, safe_divide, remap, and more.
 - **collection_utils** — Collection utilities: chunk, flatten, unique_by, group_by, partition, compact.
-- **constants** — Package-level constants (DEFAULT_HELLO_TARGET, DEFAULT_FAREWELL, DEFAULT_LANGUAGE).
+- **constants** — Package-level constants (DEFAULT_HELLO_TARGET, DEFAULT_FAREWELL, DEFAULT_LANGUAGE, DEFAULT_REGION).

docs/CHANGELOG.md

@@ -2,6 +2,12 @@
 
 All notable changes to this project will be documented in this file.
 
+## [v007] - 2026-05-14
+
+### Added
+- `DEFAULT_REGION: str = "us"` constant to `constants` module (BL-022)
+- Test functions `test_default_region_value` and `test_default_region_type` in `test_constants.py`
+
 ## [v006] - 2026-05-14
 
 ### Added

src/test_target_2/constants.py

@@ -3,3 +3,4 @@
 DEFAULT_HELLO_TARGET: str = "world"
 DEFAULT_FAREWELL: str = "goodbye"
 DEFAULT_LANGUAGE: str = "en"
+DEFAULT_REGION: str = "us"

tests/test_constants.py

@@ -35,3 +35,11 @@ def test_default_language_value() -> None:
 def test_default_language_type() -> None:
     """DEFAULT_LANGUAGE is string type."""
     assert isinstance(constants.DEFAULT_LANGUAGE, str)
+
+
+def test_default_region_value() -> None:
+    assert constants.DEFAULT_REGION == "us"
+
+
+def test_default_region_type() -> None:
+    assert isinstance(constants.DEFAULT_REGION, str)