Add a few more tests for data-carrying enums

Author: djkoloski

zerocopy-derive/tests/enum_from_zeros.rs

@@ -36,3 +36,12 @@ enum Baz {
 }
 
 assert_impl_all!(Baz: FromZeros);
+
+#[derive(FromZeros)]
+#[repr(C)]
+enum Bat {
+    A(u32),
+    B { foo: u32 },
+}
+
+assert_impl_all!(Bat: FromZeros);

zerocopy-derive/tests/enum_try_from_bytes.rs

@@ -158,4 +158,6 @@ fn test_has_fields() {
     const SIZE: usize = core::mem::size_of::<HasFields>();
     let bytes: [u8; SIZE] = zerocopy::transmute!(HasFields::B(10));
     assert_eq!(HasFields::try_read_from(&bytes[..]), Some(HasFields::B(10)));
+    let bytes: [u8; SIZE] = zerocopy::transmute!(HasFields::C { foo: 10 });
+    assert_eq!(HasFields::try_read_from(&bytes[..]), Some(HasFields::C { foo: 10 }));
 }