chore: checkpoint before Python removal

vendor/time/tests/integration/format_description.rs

@@ -0,0 +1,68 @@
+use time::format_description::{modifier, BorrowedFormatItem, Component, OwnedFormatItem};
+
+#[test]
+fn borrowed_format_item_component_conversions() {
+    let component = Component::Year(modifier::Year::default());
+    let item = BorrowedFormatItem::from(component);
+    assert!(matches!(item, BorrowedFormatItem::Component(inner) if inner == component));
+    assert_eq!(Component::try_from(item), Ok(component));
+    assert!(Component::try_from(BorrowedFormatItem::Literal(b"")).is_err());
+    assert!(<&[BorrowedFormatItem<'_>]>::try_from(BorrowedFormatItem::Literal(b"")).is_err());
+}
+
+#[test]
+fn borrowed_format_item_compound_conversions() {
+    let compound = [BorrowedFormatItem::Literal(b"")].as_slice();
+    let item = BorrowedFormatItem::from(compound);
+    assert!(matches!(item, BorrowedFormatItem::Compound(inner) if inner == compound));
+    assert_eq!(<&[BorrowedFormatItem<'_>]>::try_from(item), Ok(compound));
+}
+
+#[test]
+fn borrowed_format_item_equality() {
+    let component = Component::Year(modifier::Year::default());
+    let compound = [BorrowedFormatItem::Literal(b"")].as_slice();
+    let component_item = BorrowedFormatItem::from(component);
+    let compound_item = BorrowedFormatItem::from(compound);
+
+    assert_eq!(component, component_item);
+    assert_eq!(component_item, component);
+    assert_eq!(compound, compound_item);
+    assert_eq!(compound_item, compound);
+}
+
+#[test]
+fn owned_format_item_component_conversions() {
+    let component = Component::Year(modifier::Year::default());
+    let item = OwnedFormatItem::from(component);
+    assert!(matches!(item, OwnedFormatItem::Component(inner) if inner == component));
+    assert_eq!(Component::try_from(item), Ok(component));
+    assert!(Component::try_from(OwnedFormatItem::Literal(Box::new([]))).is_err());
+    assert!(Vec::<OwnedFormatItem>::try_from(OwnedFormatItem::Literal(Box::new([]))).is_err());
+}
+
+#[test]
+fn owned_format_item_compound_conversions() {
+    let compound = vec![OwnedFormatItem::Literal(Box::new([]))];
+    let item = OwnedFormatItem::from(compound.clone());
+    assert!(matches!(item.clone(), OwnedFormatItem::Compound(inner) if inner.to_vec() == compound));
+    assert_eq!(Vec::<OwnedFormatItem>::try_from(item), Ok(compound));
+}
+
+#[test]
+fn owned_format_item_equality() {
+    let component = Component::Year(modifier::Year::default());
+    let compound = OwnedFormatItem::from([BorrowedFormatItem::Literal(b"")].as_slice());
+    let component_item = OwnedFormatItem::from(component);
+
+    assert_eq!(component, component_item);
+    assert_eq!(component_item, component);
+    assert_eq!(
+        compound,
+        [OwnedFormatItem::Literal(Box::new([]))].as_slice()
+    );
+    assert_eq!(
+        [OwnedFormatItem::Literal(Box::new([]))].as_slice(),
+        compound
+    );
+}