feat: set up modularized version of project with testing

tests/test_projects.py

@@ -0,0 +1,67 @@
+import pytest
+
+from timesheets.projects import load_project_map, resolve_project_task
+
+PROJECT_MAP = {
+    "bugs": {"Project": "[Factry] Historian", "Task": "[Historian] Bugs"},
+    "internal": {"Project": "[Factry] Internal", "Task": ""},
+}
+
+
+# ---------------------------------------------------------------------------
+# load_project_map
+# ---------------------------------------------------------------------------
+
+
+class TestLoadProjectMap:
+    def test_returns_empty_for_none(self):
+        assert load_project_map(None) == {}
+
+    def test_loads_valid_file(self, tmp_path):
+        f = tmp_path / "map.json"
+        f.write_text('{"bugs": {"Project": "X", "Task": "Y"}}')
+        result = load_project_map(str(f))
+        assert result == {"bugs": {"Project": "X", "Task": "Y"}}
+
+    def test_missing_file_returns_empty(self, tmp_path, capsys):
+        result = load_project_map(str(tmp_path / "nonexistent.json"))
+        assert result == {}
+        assert "Warning" in capsys.readouterr().err
+
+    def test_invalid_json_returns_empty(self, tmp_path, capsys):
+        f = tmp_path / "bad.json"
+        f.write_text("not json{{{")
+        result = load_project_map(str(f))
+        assert result == {}
+        assert "Warning" in capsys.readouterr().err
+
+
+# ---------------------------------------------------------------------------
+# resolve_project_task
+# ---------------------------------------------------------------------------
+
+
+class TestResolveProjectTask:
+    def test_exact_key_match(self):
+        project, task = resolve_project_task("bugs", PROJECT_MAP)
+        assert project == "[Factry] Historian"
+        assert task == "[Historian] Bugs"
+
+    def test_case_insensitive_lookup(self):
+        project, task = resolve_project_task("BUGS", PROJECT_MAP)
+        assert project == "[Factry] Historian"
+
+    def test_missing_key_returns_raw(self):
+        project, task = resolve_project_task("unknown", PROJECT_MAP)
+        assert project == "unknown"
+        assert task == ""
+
+    def test_empty_task_in_map(self):
+        project, task = resolve_project_task("internal", PROJECT_MAP)
+        assert project == "[Factry] Internal"
+        assert task == ""
+
+    def test_empty_map(self):
+        project, task = resolve_project_task("bugs", {})
+        assert project == "bugs"
+        assert task == ""