/**
* Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on
* an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the
* specific language governing permissions and limitations under the License.
*
* Copyright 2012-2016 the original author or authors.
*/
package org.assertj.db.api.assertions;
/**
* Defines the assertion methods on the nullity of a value.
*
* @param <T> The "self" type of this assertion class. Please read "<a href="http://bit.ly/1IZIRcY"
* target="_blank">Emulating 'self types' using Java Generics to simplify fluent API implementation</a>"
* for more details.
* @author RĂ©gis Pouiller
*/
public interface AssertOnValueNullity<T extends AssertOnValueNullity<T>> {
/**
* Verifies that the value is {@code null}.
* <p>
* Example where the assertion verifies that the value in the first {@code Column} of the first {@code Row} of the
* {@code Table} is {@code null} :
* </p>
*
* <pre>
* <code class='java'>
* assertThat(table).row().value().isNull();
* </code>
* </pre>
* <p>
* Example where the assertion verifies that the value in the first {@code Column} of the {@code Row} at end point
* of the first {@code Change} is {@code null} :
* </p>
*
* <pre>
* <code class='java'>
* assertThat(changes).change().rowAtEndPoint().value().isNull();
* </code>
* </pre>
*
* @return {@code this} assertion object.
* @throws AssertionError If the value is not {@code null}.
* @see org.assertj.db.api.AbstractValueAssert#isNull()
* @see org.assertj.db.api.AbstractAssertWithValues#isNull()
*/
T isNull();
/**
* Verifies that the value is not {@code null}.
* <p>
* Example where the assertion verifies that the value in the first {@code Column} of the first {@code Row} of the
* {@code Table} is not {@code null} :
* </p>
*
* <pre>
* <code class='java'>
* assertThat(table).row().value().isNotNull();
* </code>
* </pre>
* <p>
* Example where the assertion verifies that the value in the first {@code Column} of the {@code Row} at end point
* of the first {@code Change} is not {@code null} :
* </p>
*
* <pre>
* <code class='java'>
* assertThat(changes).change().rowAtEndPoint().value().isNotNull();
* </code>
* </pre>
*
* @return {@code this} assertion object.
* @throws AssertionError If the value is {@code null}.
* @see org.assertj.db.api.AbstractValueAssert#isNotNull()
* @see org.assertj.db.api.AbstractAssertWithValues#isNotNull()
*/
T isNotNull();
}