Add more tests for Versions class

.coveragerc

@@ -5,3 +5,4 @@
 exclude_also =
     # Don't complain if non-runnable code isn't run:
     if __name__ == .__main__.:
+    if TYPE_CHECKING:

.ruff.toml

@@ -1,3 +1,4 @@
+fix = true
 target-version = "py313"  # Pin Ruff to Python 3.13
 line-length = 88
 output-format = "full"

tests/test_build_docs_versions.py

@@ -1,9 +1,13 @@
+from __future__ import annotations
+
+import pytest
+
 from build_docs import Version, Versions
 
 
-def test_filter_default() -> None:
-    # Arrange
-    versions = Versions([
+@pytest.fixture
+def versions() -> Versions:
+    return Versions([
         Version(name="3.14", status="in development", branch_or_tag=""),
         Version(name="3.13", status="stable", branch_or_tag=""),
         Version(name="3.12", status="stable", branch_or_tag=""),
@@ -12,46 +16,98 @@ def test_filter_default() -> None:
         Version(name="3.9", status="security-fixes", branch_or_tag=""),
     ])
 
+
+def test_reversed(versions) -> None:
     # Act
-    filtered = versions.filter()
+    output = list(reversed(versions))
 
     # Assert
-    assert filtered == [
-        Version(name="3.14", status="in development", branch_or_tag=""),
+    assert output[0].name == "3.9"
+    assert output[-1].name == "3.14"
+
+
+def test_from_json() -> None:
+    # Arrange
+    json_data = {
+        "3.14": {
+            "branch": "main",
+            "pep": 745,
+            "status": "feature",
+            "first_release": "2025-10-01",
+            "end_of_life": "2030-10",
+            "release_manager": "Hugo van Kemenade",
+        },
+        "3.13": {
+            "branch": "3.13",
+            "pep": 719,
+            "status": "bugfix",
+            "first_release": "2024-10-07",
+            "end_of_life": "2029-10",
+            "release_manager": "Thomas Wouters",
+        },
+    }
+
+    # Act
+    versions = list(Versions.from_json(json_data))
+
+    # Assert
+    assert versions == [
         Version(name="3.13", status="stable", branch_or_tag=""),
-        Version(name="3.12", status="stable", branch_or_tag=""),
+        Version(name="3.14", status="in development", branch_or_tag=""),
     ]
 
 
-def test_filter_one() -> None:
+def test_from_json_error() -> None:
     # Arrange
-    versions = Versions([
+    json_data = {"2.8": {"branch": "2.8", "pep": 404, "status": "ex-release"}}
+
+    # Act / Assert
+    with pytest.raises(
+        ValueError,
+        match="Saw invalid version status 'ex-release', expected to be one of",
+    ):
+        Versions.from_json(json_data)
+
+
+def test_current_stable(versions) -> None:
+    # Act
+    current_stable = versions.current_stable
+
+    # Assert
+    assert current_stable.name == "3.13"
+    assert current_stable.status == "stable"
+
+
+def test_current_dev(versions) -> None:
+    # Act
+    current_dev = versions.current_dev
+
+    # Assert
+    assert current_dev.name == "3.14"
+    assert current_dev.status == "in development"
+
+
+def test_filter_default(versions) -> None:
+    # Act
+    filtered = versions.filter()
+
+    # Assert
+    assert filtered == [
         Version(name="3.14", status="in development", branch_or_tag=""),
         Version(name="3.13", status="stable", branch_or_tag=""),
         Version(name="3.12", status="stable", branch_or_tag=""),
-        Version(name="3.11", status="security-fixes", branch_or_tag=""),
-        Version(name="3.10", status="security-fixes", branch_or_tag=""),
-        Version(name="3.9", status="security-fixes", branch_or_tag=""),
-    ])
+    ]
+
 
+def test_filter_one(versions) -> None:
     # Act
     filtered = versions.filter(["3.13"])
 
     # Assert
     assert filtered == [Version(name="3.13", status="security-fixes", branch_or_tag="")]
 
 
-def test_filter_multiple() -> None:
-    # Arrange
-    versions = Versions([
-        Version(name="3.14", status="in development", branch_or_tag=""),
-        Version(name="3.13", status="stable", branch_or_tag=""),
-        Version(name="3.12", status="stable", branch_or_tag=""),
-        Version(name="3.11", status="security-fixes", branch_or_tag=""),
-        Version(name="3.10", status="security-fixes", branch_or_tag=""),
-        Version(name="3.9", status="security-fixes", branch_or_tag=""),
-    ])
-
+def test_filter_multiple(versions) -> None:
     # Act
     filtered = versions.filter(["3.13", "3.14"])