copy OpenapiType implementations and fix codegen reference

openapi_type/tests/custom_types.rs

@@ -0,0 +1,44 @@
+#![allow(dead_code)]
+use openapi_type::OpenapiType;
+
+macro_rules! test_type {
+	($ty:ty = $json:tt) => {
+		paste::paste! {
+			#[test]
+			fn [< $ty:lower >]() {
+				let schema = <$ty as OpenapiType>::schema();
+				let schema = openapi_type::OpenapiSchema::into_schema(schema);
+				let schema_json = serde_json::to_value(&schema).unwrap();
+				let expected = serde_json::json!($json);
+				assert_eq!(schema_json, expected);
+			}
+		}
+	};
+}
+
+#[derive(OpenapiType)]
+struct UnitStruct;
+test_type!(UnitStruct = {
+	"type": "object",
+	"title": "UnitStruct",
+	"additionalProperties": false
+});
+
+#[derive(OpenapiType)]
+struct SimpleStruct {
+	foo: String,
+	bar: isize
+}
+test_type!(SimpleStruct = {
+	"type": "object",
+	"title": "SimpleStruct",
+	"properties": {
+		"foo": {
+			"type": "string"
+		},
+		"bar": {
+			"type": "integer"
+		}
+	},
+	"required": ["foo", "bar"]
+});