Fix recursion error when eo band name is missing

CHANGELOG.md

@@ -19,6 +19,7 @@
 
 - Make `get_all_collections` properly recursive ([#1361](https://github.com/stac-utils/pystac/pull/1361))
 - Set `Item::collection` to `None` when there is no collection ([#1400](https://github.com/stac-utils/pystac/pull/1400))
+- Recursion error when `name` not set on `eo:bands` ([#1406](https://github.com/stac-utils/pystac/pull/1406))
 
 ### Removed
 

pystac/extensions/eo.py

@@ -225,7 +225,7 @@ def solar_illumination(self, v: float | None) -> None:
             self.properties.pop("solar_illumination", None)
 
     def __repr__(self) -> str:
-        return f"<Band name={self.name}>"
+        return f"<Band name={self.properties.get('name')}>"
 
     def to_dict(self) -> dict[str, Any]:
         """Returns this band as a dictionary.

tests/extensions/test_eo.py

@@ -5,7 +5,7 @@
 
 import pystac
 from pystac import ExtensionTypeError, Item
-from pystac.errors import ExtensionNotImplemented
+from pystac.errors import ExtensionNotImplemented, RequiredPropertyMissing
 from pystac.extensions.eo import PREFIX, SNOW_COVER_PROP, Band, EOExtension
 from pystac.extensions.projection import ProjectionExtension
 from pystac.summaries import RangeSummary
@@ -504,3 +504,14 @@ def test_ext_syntax_add(item: pystac.Item) -> None:
     item.ext.add("eo")
     assert item.ext.has("eo") is True
     assert isinstance(item.ext.eo, EOExtension)
+
+
+def test_required_property_missing(ext_item: pystac.Item) -> None:
+    # https://github.com/stac-utils/pystac/issues/1402
+    d = ext_item.to_dict(include_self_link=False, transform_hrefs=False)
+    del d["assets"]["B1"]["eo:bands"][0]["name"]
+    item = pystac.Item.from_dict(d)
+    bands = item.assets["B1"].ext.eo.bands
+    assert bands is not None
+    with pytest.raises(RequiredPropertyMissing):
+        bands[0].name