Add test coverage

pyproject.toml

@@ -29,6 +29,7 @@ dev = [
     "fastembed>=0.7.3",
     "pytest>=8.4.2",
     "pytest-asyncio>=1.2.0",
+    "pytest-cov>=7.0.0",
     "pytest-sugar>=1.1.1",
     "ruff>=0.13.2",
 ]
@@ -48,3 +49,26 @@ extend-exclude = ["tests"]
 [tool.ruff.lint]
 extend-select = ["I", "D", "ERA", "UP", "FURB", "TRY", "PERF"]
 ignore = ["D203", "D213"]
+
+[tool.coverage.run]
+source = ["src"]
+branch = true
+omit = [
+    "tests/*",
+    "*/conftest.py",
+]
+
+[tool.coverage.report]
+exclude_lines = [
+    "pragma: no cover",
+    "def __repr__",
+    "raise AssertionError",
+    "raise NotImplementedError",
+    "if __name__ == .__main__.:",
+    "@abstractmethod",
+]
+show_missing = true
+precision = 2
+
+[tool.coverage.html]
+directory = "htmlcov"