Update.

test/wdantic/schema.wren

@@ -0,0 +1,36 @@
+// retoor <retoor@molodetz.nl>
+
+import "wdantic" for Schema, Field, ValidationResult
+
+var userSchema = Schema.new({
+  "name": Field.string({"minLength": 1}),
+  "age": Field.integer({"min": 0, "max": 150}),
+  "email": Field.email()
+})
+
+var validData = {"name": "John", "age": 30, "email": "john@example.com"}
+var result = userSchema.validate(validData)
+System.print(result.isValid) // expect: true
+System.print(result.data["name"]) // expect: John
+System.print(result.data["age"]) // expect: 30
+
+var invalidData = {"name": "", "age": -5, "email": "invalid"}
+var result2 = userSchema.validate(invalidData)
+System.print(result2.isValid) // expect: false
+System.print(result2.errors.count > 0) // expect: true
+
+var optionalSchema = Schema.new({
+  "name": Field.string(),
+  "nickname": Field.optional(Field.string())
+})
+
+var data3 = {"name": "Alice"}
+var result3 = optionalSchema.validate(data3)
+System.print(result3.isValid) // expect: true
+
+var listSchema = Schema.new({
+  "tags": Field.list(Field.string())
+})
+var data4 = {"tags": ["a", "b", "c"]}
+var result4 = listSchema.validate(data4)
+System.print(result4.isValid) // expect: true