chore: checkpoint before Python removal

vendor/schemars/tests/transparent.rs

@@ -0,0 +1,31 @@
+mod util;
+use schemars::JsonSchema;
+use util::*;
+
+#[allow(dead_code)]
+#[derive(JsonSchema)]
+pub struct OuterStruct {
+    inner: TransparentStruct,
+}
+
+#[allow(dead_code)]
+#[derive(JsonSchema)]
+#[serde(transparent)]
+pub struct TransparentStruct {
+    #[serde(with = "TransparentNewType")]
+    inner: (),
+}
+
+#[allow(dead_code)]
+#[derive(JsonSchema)]
+#[schemars(transparent)]
+pub struct TransparentNewType(Option<InnerStruct>);
+
+#[allow(dead_code)]
+#[derive(JsonSchema)]
+pub struct InnerStruct(String, i32);
+
+#[test]
+fn transparent_struct() -> TestResult {
+    test_default_generated_schema::<OuterStruct>("transparent-struct")
+}