Remove image_height and image_width attributes; test that every method/attribute has docs

src/astro_image_display_api/api_test.py

@@ -18,12 +18,14 @@
 
 __all__ = ["ImageAPITest"]
 
+DEFAULT_IMAGE_SHAPE = (100, 150)
+
 
 class ImageAPITest:
     @pytest.fixture
     def data(self):
         rng = np.random.default_rng(1234)
-        return rng.random((100, 150))
+        return rng.random(DEFAULT_IMAGE_SHAPE)
 
     @pytest.fixture
     def wcs(self):
@@ -49,8 +51,8 @@ def catalog(self, wcs: WCS) -> Table:
         expected columns.
         """
         rng = np.random.default_rng(45328975)
-        x = rng.uniform(0, self.image.image_width, size=10)
-        y = rng.uniform(0, self.image.image_height, size=10)
+        x = rng.uniform(0, DEFAULT_IMAGE_SHAPE[0], size=10)
+        y = rng.uniform(0, DEFAULT_IMAGE_SHAPE[1], size=10)
         coord = wcs.pixel_to_world(x, y)
 
         cat = Table(
@@ -70,7 +72,7 @@ def setup(self):
         Subclasses MUST define ``image_widget_class`` -- doing so as a
         class variable does the trick.
         """
-        self.image = self.image_widget_class(image_width=250, image_height=100)
+        self.image = self.image_widget_class()
 
     def _assert_empty_catalog_table(self, table):
         assert isinstance(table, Table)
@@ -81,17 +83,6 @@ def _get_catalog_names_as_set(self):
         marks = self.image.catalog_names
         return set(marks)
 
-    def test_width_height(self):
-        assert self.image.image_width == 250
-        assert self.image.image_height == 100
-
-        width = 200
-        height = 300
-        self.image.image_width = width
-        self.image.image_height = height
-        assert self.image.image_width == width
-        assert self.image.image_height == height
-
     @pytest.mark.parametrize("load_type", ["fits", "nddata", "array"])
     def test_load(self, data, tmp_path, load_type):
         match load_type:
@@ -915,3 +906,25 @@ def test_all_methods_accept_additional_kwargs(self, data, catalog, tmp_path):
             "The following methods failed when called with additional kwargs:\n\t"
             f"{'\n\t'.join(failed_methods)}"
         )
+
+    def test_every_method_attribute_has_docstring(self):
+        """
+        Check that every method and attribute in the protocol has a docstring.
+        """
+        from astro_image_display_api import ImageViewerInterface
+
+        all_methods_and_attributes = ImageViewerInterface.__protocol_attrs__
+
+        method_attrs_no_docs = []
+
+        for method in all_methods_and_attributes:
+            attr = getattr(self.image, method)
+            # Make list of methods and attributes that have no docstring
+            # and assert that list is empty at the end of the test.
+            if not attr.__doc__:
+                method_attrs_no_docs.append(method)
+
+        assert not method_attrs_no_docs, (
+            "The following methods and attributes have no docstring:\n\t"
+            f"{'\n\t'.join(method_attrs_no_docs)}"
+        )

src/astro_image_display_api/image_viewer_logic.py

@@ -53,19 +53,27 @@ class ViewportInfo:
     data: ArrayLike | NDData | CCDData | None = None
 
 
+def docs_from_interface(cls):
+    """
+    Decorator to copy the docstrings from the interface methods to the
+    methods in the class.
+    """
+    for name, method in cls.__dict__.items():
+        if not name.startswith("_"):
+            interface_method = getattr(ImageViewerInterface, name, None)
+            if interface_method:
+                method.__doc__ = interface_method.__doc__
+    return cls
+
+
 @dataclass
+@docs_from_interface
 class ImageViewerLogic:
     """
     This viewer does not do anything except making changes to its internal
     state to simulate the behavior of a real viewer.
     """
 
-    # These are attributes, not methods. The type annotations are there
-    # to make sure Protocol knows they are attributes. Python does not
-    # do any checking at all of these types.
-    image_width: int = 0
-    image_height: int = 0
-    zoom_level: float = 1
     _cuts: BaseInterval | tuple[float, float] = AsymmetricPercentileInterval(
         upper_percentile=95
     )
@@ -206,8 +214,6 @@ def set_colormap(
             )
         self._images[image_label].colormap = map_name
 
-    set_colormap.__doc__ = ImageViewerInterface.set_colormap.__doc__
-
     def get_colormap(
         self,
         image_label: str | None = None,
@@ -220,28 +226,13 @@ def get_colormap(
             )
         return self._images[image_label].colormap
 
-    get_colormap.__doc__ = ImageViewerInterface.get_colormap.__doc__
-
     # The methods, grouped loosely by purpose
 
     def get_catalog_style(
         self,
         catalog_label=None,
         **kwargs,  # noqa: ARG002
     ) -> dict[str, Any]:
-        """
-        Get the style for the catalog.
-
-        Parameters
-        ----------
-        catalog_label : str, optional
-            The label of the catalog. Default is ``None``.
-
-        Returns
-        -------
-        dict
-            The style for the catalog.
-        """
         catalog_label = self._resolve_catalog_label(catalog_label)
 
         style = self._catalogs[catalog_label].style.copy()
@@ -256,22 +247,6 @@ def set_catalog_style(
         size: float = 5,
         **kwargs,
     ) -> None:
-        """
-        Set the style for the catalog.
-
-        Parameters
-        ----------
-        catalog_label : str, optional
-            The label of the catalog.
-        shape : str, optional
-            The shape of the markers.
-        color : str, optional
-            The color of the markers.
-        size : float, optional
-            The size of the markers.
-        **kwargs
-            Additional keyword arguments to pass to the marker style.
-        """
         catalog_label = self._resolve_catalog_label(catalog_label)
 
         if self._catalogs[catalog_label].data is None:
@@ -324,18 +299,6 @@ def load_image(
         image_label: str | None = None,
         **kwargs,  # noqa: ARG002
     ) -> None:
-        """
-        Load a FITS file into the viewer.
-
-        Parameters
-        ----------
-        file : str or array-like
-            The FITS file to load. If a string, it can be a URL or a
-            file path.
-
-        image_label : str, optional
-            A label for the image.
-        """
         image_label = self._resolve_image_label(image_label)
 
         # Delete the current viewport if it exists
@@ -375,8 +338,6 @@ def get_image(
     def image_labels(self) -> tuple[str, ...]:
         return tuple(k for k in self._images.keys() if k is not None)
 
-    image_labels.__doc__ = ImageViewerInterface.image_labels.__doc__
-
     def _determine_largest_dimension(self, shape: tuple[int, int]) -> int:
         """
         Determine which index is the largest dimension.
@@ -497,19 +458,6 @@ def save(
         overwrite: bool = False,
         **kwargs,  # noqa: ARG002
     ) -> None:
-        """
-        Save the current view to a file.
-
-        Parameters
-        ----------
-        filename : str or `os.PathLike`
-            The file to save to. The format is determined by the
-            extension.
-
-        overwrite : bool, optional
-            If `True`, overwrite the file if it exists. Default is
-            `False`.
-        """
         p = Path(filename)
         if p.exists() and not overwrite:
             raise FileExistsError(
@@ -586,8 +534,6 @@ def load_catalog(
 
         self._catalogs[catalog_label].style = catalog_style
 
-    load_catalog.__doc__ = ImageViewerInterface.load_catalog.__doc__
-
     def remove_catalog(
         self,
         catalog_label: str | None = None,
@@ -645,14 +591,10 @@ def get_catalog(
 
         return result
 
-    get_catalog.__doc__ = ImageViewerInterface.get_catalog.__doc__
-
     @property
     def catalog_names(self) -> tuple[str, ...]:
         return tuple(self._user_catalog_labels())
 
-    catalog_names.__doc__ = ImageViewerInterface.catalog_names.__doc__
-
     # Methods that modify the view
     def set_viewport(
         self,
@@ -728,8 +670,6 @@ def set_viewport(
         self._images[image_label].center = center
         self._images[image_label].fov = fov
 
-    set_viewport.__doc__ = ImageViewerInterface.set_viewport.__doc__
-
     def get_viewport(
         self,
         sky_or_pixel: str | None = None,
@@ -805,5 +745,3 @@ def get_viewport(
                 fov = viewport.fov
 
         return dict(center=center, fov=fov, image_label=image_label)
-
-    get_viewport.__doc__ = ImageViewerInterface.get_viewport.__doc__

src/astro_image_display_api/interface_definition.py

@@ -15,12 +15,6 @@
 
 @runtime_checkable
 class ImageViewerInterface(Protocol):
-    # These are attributes, not methods. The type annotations are there
-    # to make sure Protocol knows they are attributes. Python does not
-    # do any checking at all of these types.
-    image_width: int
-    image_height: int
-
     # The methods, grouped loosely by purpose
 
     # Method for loading image data

tests/test_astro_image_display_api.py

@@ -72,3 +72,26 @@ def test_api_test_class_covers_all_attributes_and_only_those_attributes():
         "ImageWidgetAPITest does not access these "
         f"attributes/methods:\n{missing_attributes_msg}\n"
     )
+
+
+def test_every_method_attribute_has_docstring():
+    """
+    Check that every method and attribute in the protocol has a docstring.
+    """
+    from astro_image_display_api import ImageViewerInterface
+
+    all_methods_and_attributes = ImageViewerInterface.__protocol_attrs__
+
+    method_attrs_no_docs = []
+
+    for method in all_methods_and_attributes:
+        attr = getattr(ImageViewerInterface, method)
+        # Make list of methods and attributes that have no docstring
+        # and assert that list is empty at the end of the test.
+        if not attr.__doc__:
+            method_attrs_no_docs.append(method)
+
+    assert not method_attrs_no_docs, (
+        "The following methods and attributes have no docstring:\n\t"
+        f"{'\n\t'.join(method_attrs_no_docs)}"
+    )