NullableConstraint2Tests.java

package org.grails.validation;

import grails.validation.AbstractConstraintTests;
import grails.validation.ConstrainedProperty;
import grails.validation.TestClass;

/**
 * Test cases for 'nullable' constraint.
 *
 * @author Sergey Nebolsin (<a href="mailto:nebolsin@gmail.com"/>)
 */
public class NullableConstraint2Tests extends AbstractConstraintTests {
    @Override
    protected Class<?> getConstraintClass() {
        return NullableConstraint.class;
    }

    public void testValidation() {
        testConstraintMessageCodes(
                getConstraint("testString", Boolean.FALSE),
                null,
                new String[] {"testClass.testString.nullable.error","testClass.testString.nullable"},
                new Object[] {"testString",TestClass.class });

        testConstraintPassed(
                getConstraint("testString", Boolean.FALSE),
                "test");

        testConstraintPassed(
                getConstraint("testString", Boolean.TRUE),
                "");

        testConstraintFailedAndVetoed(
                getConstraint("testString", Boolean.FALSE),
                null);

        testConstraintDefaultMessage(
                getConstraint("testString", Boolean.FALSE),
                null,
                "Property [{0}] of class [{1}] cannot be null");
    }

    public void testCreation() {
        NullableConstraint constraint = (NullableConstraint) getConstraint("testString", Boolean.FALSE);
        assertEquals(ConstrainedProperty.NULLABLE_CONSTRAINT, constraint.getName());
        assertTrue(constraint.supports(String.class));
        assertTrue(constraint.supports(Object.class));
        assertFalse(constraint.supports(int.class));
        assertFalse(constraint.supports(float.class));
        assertFalse(constraint.supports(null));
        assertFalse(constraint.isNullable());

        try {
            getConstraint("testString", "wrong");
            fail("NullableConstraint must throw an exception for non-boolean parameters.");
        } catch(IllegalArgumentException iae) {
            // Great
        }
    }
}