Adding tests

Author: zanjonke

tests/data/partial_rendering/pr_leaf.plain

@@ -0,0 +1,9 @@
+***implementation reqs***
+
+- Leaf implementation requirement.
+
+***functional specs***
+
+- Leaf functionality one.
+
+- Leaf functionality two.

tests/data/partial_rendering/pr_middle.plain

@@ -0,0 +1,14 @@
+---
+requires:
+  - pr_leaf
+---
+
+***implementation reqs***
+
+- Middle implementation requirement.
+
+***functional specs***
+
+- Middle functionality one.
+
+- Middle functionality two.

tests/data/partial_rendering/pr_root.plain

@@ -0,0 +1,14 @@
+---
+requires:
+  - pr_middle
+---
+
+***implementation reqs***
+
+- Root implementation requirement.
+
+***functional specs***
+
+- Root functionality one.
+
+- Root functionality two.

tests/data/partial_rendering/pr_solo.plain

@@ -0,0 +1,11 @@
+***implementation reqs***
+
+- Solo implementation requirement.
+
+***functional specs***
+
+- Solo functionality one.
+
+- Solo functionality two.
+
+- Solo functionality three.

tests/test_git_utils.py

@@ -12,6 +12,7 @@
     REFACTORED_CODE_COMMIT_MESSAGE,
     add_all_files_and_commit,
     diff,
+    get_last_finished_frid,
     init_git_repo,
     revert_changes,
     revert_to_commit_with_frid,
@@ -456,3 +457,73 @@ def test_revert_to_base_folder_no_commit(temp_repo):
     assert repo.active_branch.name == "main"
     assert len(list(repo.iter_commits())) == 1  # initial commit
     assert not file_path.exists()
+
+
+def test_get_last_finished_frid_non_existent_path():
+    """Return (None, None) when the repo path doesn't exist."""
+    assert get_last_finished_frid("/path/that/does/not/exist") == (None, None)
+
+
+def test_get_last_finished_frid_empty_repo(empty_repo):
+    """Return (None, None) when no FRID-finished commit exists."""
+    assert get_last_finished_frid(empty_repo) == (None, None)
+
+
+def test_get_last_finished_frid_returns_latest(empty_repo):
+    """Return the module name and frid from the most recent finished-frid commit."""
+    file_path = Path(empty_repo) / "a.txt"
+    file_path.write_text("v1")
+    add_all_files_and_commit(
+        empty_repo,
+        FUNCTIONAL_REQUIREMENT_FINISHED_COMMIT_MESSAGE.format("1"),
+        module_name="module_a",
+        frid="1",
+    )
+
+    file_path.write_text("v2")
+    add_all_files_and_commit(
+        empty_repo,
+        FUNCTIONAL_REQUIREMENT_FINISHED_COMMIT_MESSAGE.format("2"),
+        module_name="module_a",
+        frid="2",
+    )
+
+    assert get_last_finished_frid(empty_repo) == ("module_a", "2")
+
+
+def test_get_last_finished_frid_ignores_non_finished_commits(empty_repo):
+    """Commits that aren't finished-frid checkpoints must be skipped."""
+    file_path = Path(empty_repo) / "a.txt"
+    file_path.write_text("v1")
+    add_all_files_and_commit(
+        empty_repo,
+        FUNCTIONAL_REQUIREMENT_FINISHED_COMMIT_MESSAGE.format("1"),
+        module_name="module_a",
+        frid="1",
+    )
+
+    # A refactor commit (not a finished-frid checkpoint) comes after.
+    file_path.write_text("v2")
+    add_all_files_and_commit(
+        empty_repo,
+        REFACTORED_CODE_COMMIT_MESSAGE.format("2"),
+        module_name="module_a",
+        frid="2",
+    )
+
+    # The last *finished* FRID is still 1
+    assert get_last_finished_frid(empty_repo) == ("module_a", "1")
+
+
+def test_get_last_finished_frid_without_module_name(empty_repo):
+    """If the commit omits the module name line, return None for the module."""
+    file_path = Path(empty_repo) / "a.txt"
+    file_path.write_text("v1")
+    add_all_files_and_commit(
+        empty_repo,
+        FUNCTIONAL_REQUIREMENT_FINISHED_COMMIT_MESSAGE.format("7"),
+        module_name=None,
+        frid="7",
+    )
+
+    assert get_last_finished_frid(empty_repo) == (None, "7")