From 50ef909a0031eb892c9edd10ee5cfc8c36eee7d3 Mon Sep 17 00:00:00 2001 From: Lars Reimann Date: Wed, 29 Nov 2023 14:49:10 +0100 Subject: [PATCH] docs: add project guidelines --- docs/development/environment.md | 2 +- docs/development/project_guidelines.md | 245 +++++++++++++++++++++++++ mkdocs.yml | 2 + 3 files changed, 248 insertions(+), 1 deletion(-) create mode 100644 docs/development/project_guidelines.md diff --git a/docs/development/environment.md b/docs/development/environment.md index fb2a62b3..c3b37c4e 100644 --- a/docs/development/environment.md +++ b/docs/development/environment.md @@ -6,7 +6,7 @@ This document describes how to configure and use your development environment. You must complete these steps once before you can start setting up the project itself: -1. Install [Python 3.10](https://www.python.org/downloads/). +1. Install [Python 3.11](https://www.python.org/downloads/). 2. Verify that `python` can be launched by running this command in a **new** terminal: ```shell python --version diff --git a/docs/development/project_guidelines.md b/docs/development/project_guidelines.md new file mode 100644 index 00000000..49e96bfd --- /dev/null +++ b/docs/development/project_guidelines.md @@ -0,0 +1,245 @@ +# Project Guidelines + +This document describes general guidelines for the Safe-DS Stub Generator. + +## Docstrings + +The docstrings **should** use the [numpydoc](https://numpydoc.readthedocs.io/en/latest/format.html) format. The +descriptions **should not** start with "this" and **should** use imperative mood. Refer to the subsections below for +more details on how to document specific API elements. + +!!! success "**DO**:" + + ```py + def add_ints(a: int, b: int) -> int: + """Add two integers.""" + return a + b + ``` + +!!! failure "**DON'T**:" + + ```py + def add_ints(a: int, b: int) -> int: + """This function adds two integers.""" + return a + b + ``` + +!!! failure "**DON'T**:" + + ```py + def add_ints(a: int, b: int) -> int: + """Adds two integers.""" + return a + b + ``` + +!!! success "**DO**:" + + ```py + def __init__(self, data: Mapping[str, Any] | None = None) -> None: + """ + data : Mapping[str, Any] | None + """ + ``` + +!!! failure "**DON'T**:" + + ```py + def __init__(self, data: Optional[Mapping[str, Any]] = None) -> None: + """ + data : Optional[Mapping[str, Any]] + """ + ``` + +!!! failure "**DON'T**:" + + ```py + def __init__(self, data: Mapping[str, Any] | None = None) -> None: + """ + data : Optional[Mapping[str, Any]] + """ + ``` + +### Modules + +All modules should have + +* a one-line description ([short summary][short-summary-section]), +* a longer description if needed ([extended summary][extended-summary-section]). + +Example: + +```py +"""Containers for tabular data.""" +``` + +### Classes + +All classes should have + +* a one-line description ([short summary][short-summary-section]), +* a longer description if needed ([extended summary][extended-summary-section]) +* a description of the parameters of their `__init__` method ([`Parameters` section][parameters-section]), +* examples that show how to use them correctly ([`Examples` section][examples-section]). + +Example: + +```py +""" +A row is a collection of named values. + +Parameters +---------- +data : Mapping[str, Any] | None + The data. If None, an empty row is created. + +Examples +-------- +>>> from safeds.data.tabular.containers import Row +>>> row = Row({"a": 1, "b": 2}) +""" +``` + +### Functions + +All functions should have + +* a one-line description ([short summary][short-summary-section]), +* a longer description if needed ([extended summary][extended-summary-section]) +* a description of their parameters ([`Parameters` section][parameters-section]), +* a description of their results ([`Returns` section][returns-section]), +* a description of any exceptions that may be raised and under which conditions that may + happen ([`Raises` section][raises-section]), +* a description of any warnings that may be issued and under which conditions that may + happen ([`Warns` section][warns-section]), +* examples that show how to use them correctly ([`Examples` section][examples-section]). + +Example: + +```py +""" +Return the value of a specified column. + +Parameters +---------- +column_name : str + The column name. + +Returns +------- +value : Any + The column value. + +Raises +------ +UnknownColumnNameError + If the row does not contain the specified column. + +Examples +-------- +>>> from safeds.data.tabular.containers import Row +>>> row = Row({"a": 1, "b": 2}) +>>> row.get_value("a") +1 +""" +``` + +## Tests + +We aim for 100% line coverage, so automated tests should be added for any new function. + +### File structure + +Tests belong in the [`tests`][tests-folder] folder. The file structure in the tests folder should mirror the file +structure of the [`src`][src-folder] folder. + +### Naming + +Names of test functions shall start with `test_should_` followed by a description of the expected behaviour, +e.g. `test_should_add_column`. + +!!! success "**DO**:" + + ```py + def test_should_raise_if_less_than_or_equal_to_0(self, number_of_trees) -> None: + with pytest.raises(ValueError, match="The parameter 'number_of_trees' has to be greater than 0."): + ... + ``` + +!!! failure "**DON'T**:" + + ```py + def test_value_error(self, number_of_trees) -> None: + with pytest.raises(ValueError, match="The parameter 'number_of_trees' has to be greater than 0."): + ... + ``` + +### Parametrization + +Tests should be parametrized using `@pytest.mark.parametrize`, even if there is only a single test case. This makes it +easier to add new test cases in the future. Test cases should be given descriptive IDs. + +!!! success "**DO**:" + + ```py + @pytest.mark.parametrize("number_of_trees", [0, -1], ids=["zero", "negative"]) + def test_should_raise_if_less_than_or_equal_to_0(self, number_of_trees) -> None: + with pytest.raises(ValueError, match="The parameter 'number_of_trees' has to be greater than 0."): + RandomForest(number_of_trees=number_of_trees) + ``` + +!!! failure "**DON'T**:" + + ```py + def test_should_raise_if_less_than_0(self, number_of_trees) -> None: + with pytest.raises(ValueError, match="The parameter 'number_of_trees' has to be greater than 0."): + RandomForest(number_of_trees=-1) + + def test_should_raise_if_equal_to_0(self, number_of_trees) -> None: + with pytest.raises(ValueError, match="The parameter 'number_of_trees' has to be greater than 0."): + RandomForest(number_of_trees=0) + ``` + +## Code style + +### Consistency + +If there is more than one way to solve a particular task, check how it has been solved at other places in the codebase +and stick to that solution. + +### Sort exported classes in `__init__.py` + +Classes defined in a module that other classes shall be able to import must be defined in a list named `__all__` in the +module's `__init__.py` file. This list should be sorted alphabetically, to reduce the likelihood of merge conflicts when +adding new classes to it. + +!!! success "**DO**:" + + ```py + __all__ = [ + "Column", + "Row", + "Table", + "TaggedTable", + ] + ``` + +!!! failure "**DON'T**:" + + ```py + __all__ = [ + "Table", + "TaggedTable", + "Column", + "Row", + ] + ``` + +[src-folder]: https://github.com/Safe-DS/Library/tree/main/src +[tests-folder]: https://github.com/Safe-DS/Library/tree/main/tests +[short-summary-section]: https://numpydoc.readthedocs.io/en/latest/format.html#short-summary +[extended-summary-section]: https://numpydoc.readthedocs.io/en/latest/format.html#extended-summary +[parameters-section]: https://numpydoc.readthedocs.io/en/latest/format.html#parameters +[returns-section]: https://numpydoc.readthedocs.io/en/latest/format.html#returns +[raises-section]: https://numpydoc.readthedocs.io/en/latest/format.html#raises +[warns-section]: https://numpydoc.readthedocs.io/en/latest/format.html#warns +[examples-section]: https://numpydoc.readthedocs.io/en/latest/format.html#examples diff --git a/mkdocs.yml b/mkdocs.yml index f1fb9b04..6d80ac12 100644 --- a/mkdocs.yml +++ b/mkdocs.yml @@ -11,6 +11,8 @@ nav: - Changelog: CHANGELOG.md - Development: - Environment: development/environment.md + - Project Guidelines: development/project_guidelines.md + - Contributing 🌐: https://github.com/Safe-DS/Stub-Generator/contribute # Configuration of MkDocs & Material for MkDocs --------------------------------