change the order of extracting a version

pyproject.toml is the first - then installed package

single_source/version.py

@@ -56,9 +56,9 @@ def get_version(
     if not target_path.is_file():
         target_path /= pyproject_name
 
-    version: Optional[str] = _get_version_from_metadata(package_name)
+    version: Optional[str] = _get_version_from_path(target_path, version_regex)
     if version is None:
-        version = _get_version_from_path(target_path, version_regex)
+        version = _get_version_from_metadata(package_name)
 
     if not version and fail:
         raise VersionNotFoundError(

tests/conftest.py

@@ -1,6 +1,7 @@
 from pathlib import Path
 
 import pytest
+import toml
 
 TEST_VERSION_STRINGS = [
     ("version = '2.0.1-alpha.0'  ", "2.0.1-alpha.0"),
@@ -30,6 +31,12 @@ def correct_pyproject_path() -> Path:
     return Path(__file__).parent / "data" / "pyproject.toml"
 
 
+@pytest.fixture
+def version_from_pyproject(correct_pyproject_path: Path) -> str:
+    pyproject = toml.load(str(correct_pyproject_path))
+    return pyproject["tool"]["poetry"]["version"].strip()
+
+
 @pytest.fixture
 def correct_setuppy_path() -> Path:
     return Path(__file__).parent / "data" / "setup.py"

tests/test_version.py

@@ -1,7 +1,7 @@
 import sys
+from pathlib import Path
 
 import pytest
-import toml
 
 from single_source.version import (
     VERSION_REGEX,
@@ -30,12 +30,11 @@ def test_get_version_from_installed_package(mocker):
     assert version_from_metadata == expected_version
 
 
-def test_get_version_from_pyproject(correct_pyproject_path):
-    pyproject = toml.load(str(correct_pyproject_path))
-
+def test_get_version_from_pyproject(
+    correct_pyproject_path: Path, version_from_pyproject: str
+):
     version = _get_version_from_path(correct_pyproject_path, VERSION_REGEX)
-    cleaned_version = pyproject["tool"]["poetry"]["version"].strip()
-    assert version == cleaned_version
+    assert version == version_from_pyproject
 
 
 def test_get_version_raise_exception(non_existing_package_name, bad_pyproject_path):
@@ -64,3 +63,13 @@ def test_get_version_from_setuppy(correct_setuppy_path):
 
     version = _get_version_from_path(correct_setuppy_path, VERSION_REGEX)
     assert version == expected_version
+
+
+def test_get_version_pyproject_first_priority_than_from_installed_package(
+    correct_pyproject_path: Path, version_from_pyproject: str
+):
+    package_name = "dummy_name"
+    fail = True
+
+    version = get_version(package_name, correct_pyproject_path.parent, fail=fail)
+    assert version == version_from_pyproject