add validator tests

src/test/java/it/aboutbits/springboot/toolbox/validation/validator/ScaledBigDecimalValidatorTest.java

@@ -0,0 +1,27 @@
+package it.aboutbits.springboot.toolbox.validation.validator;
+
+import it.aboutbits.springboot.toolbox.type.ScaledBigDecimal;
+import jakarta.validation.Validation;
+import jakarta.validation.ValidatorFactory;
+import jakarta.validation.constraints.Positive;
+import org.junit.jupiter.api.Test;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+public class BeanValidatorTest {
+    private static final ValidatorFactory VALIDATOR_FACTORY = Validation.buildDefaultValidatorFactory();
+
+    record TestBean(@Positive ScaledBigDecimal value) {
+    }
+
+    @Test
+    void test() {
+        var validator = VALIDATOR_FACTORY.getValidator();
+
+        var instance = new TestBean(ScaledBigDecimal.ZERO);
+
+        var violations = validator.validate(instance);
+
+        assertThat(violations).isNotEmpty();
+    }
+}