Introduce coverage settings and failure threshold

pyproject.toml

@@ -12,22 +12,6 @@ exclude_dirs = ["tests"]
 line-length = 120
 target-version = ["py38"]
 
-[tool.coverage.paths]
-tests = ["tests"]
-vizro = ["src/vizro"]
-
-[tool.coverage.report]
-exclude_lines = [
-  "no cov",
-  "if __name__ == .__main__.:",
-  "if TYPE_CHECKING:"
-]
-
-[tool.coverage.run]
-branch = true
-parallel = true
-source_pkgs = ["vizro", "tests"]
-
 [tool.mypy]
 # strict checks : strict = true
 check_untyped_defs = true

vizro-core/changelog.d/20230926_113052_maximilian_schulz_introduce_coverage.md

@@ -0,0 +1,42 @@
+<!--
+A new scriv changelog fragment.
+
+Uncomment the section that is right (remove the HTML comment wrapper).
+-->
+
+<!--
+### Removed
+
+- A bullet item for the Removed category.
+
+-->
+<!--
+### Added
+
+- A bullet item for the Added category.
+
+-->
+<!--
+### Changed
+
+- A bullet item for the Changed category.
+
+-->
+<!--
+### Deprecated
+
+- A bullet item for the Deprecated category.
+
+-->
+<!--
+### Fixed
+
+- A bullet item for the Fixed category.
+
+-->
+<!--
+### Security
+
+- A bullet item for the Security category.
+
+-->

vizro-core/pyproject.toml

@@ -46,3 +46,21 @@ kedro = [
 Documentation = "https://github.com/mckinsey/vizro#readme"
 Issues = "https://github.com/mckinsey/vizro/issues"
 Source = "https://github.com/mckinsey/vizro"
+
+[tool.coverage.paths]
+vizro = ["src/vizro"]  # omit tests for clarity, although this can be useful to see what test lines DID NOT run
+
+[tool.coverage.report]
+exclude_lines = [
+  "no cov",
+  "if __name__ == .__main__.:",
+  "if TYPE_CHECKING:"
+]
+fail_under = 82
+show_missing = true
+skip_covered = true
+
+[tool.coverage.run]
+branch = true
+parallel = true
+source_pkgs = ["vizro"]