PreconditionsTest.java

/*
 * Copyright 2015 Red Hat, Inc. and/or its affiliates.
 *
 * 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.
 */

package org.uberfire.commons.validation;

import org.junit.Test;

import static org.hamcrest.core.Is.is;
import static org.junit.Assert.*;
import static org.uberfire.commons.validation.Preconditions.checkCondition;
import static org.uberfire.commons.validation.Preconditions.checkEachParameterNotNull;
import static org.uberfire.commons.validation.Preconditions.checkNotEmpty;
import static org.uberfire.commons.validation.Preconditions.checkNotNull;
import static org.uberfire.commons.validation.Preconditions.checkNullMandatory;

/**
 * Test class for {@link Preconditions}
 */
public class PreconditionsTest {

    @Test
    public void shouldDoNotThrowExceptionWhenGettingNotEmptyArray() {
        checkNotEmpty("notEmpty",
                      new Object[]{1, 2, 3});
    }

    @Test
    public void shouldDoNotThrowExceptionWhenGettingNotEmptyParameter() {
        checkNotEmpty("notEmpty",
                      "notEmpty");
    }

    @Test
    public void shouldDoNotThrowExceptionWhenGettingNotNullParameter() {
        checkNotNull("notNullable",
                     "notNullValue");
    }

    @Test
    public void shouldDoNotThrowExceptionWhenGettingNullParameter() {
        checkNullMandatory("nullable",
                           null);
    }

    @Test
    public void shouldDoNotThrowExceptionWhenGettingValidConditionParameter() {
        checkCondition("valid",
                       true);
    }

    @Test
    public void shouldDoNotThrowExceptionWhenGettinOnlyNonNullParameters() {
        checkEachParameterNotNull("notNullable",
                                  "nonNull");
        checkEachParameterNotNull("notNullable",
                                  "nonNull",
                                  "anotherNonNull");
    }

    @Test
    public void shouldGetCorrectErrorNessage() {
        try {
            checkNotNull("notNullable",
                         null);
        } catch (final IllegalArgumentException e) {
            assertThat(e.getMessage(),
                       is("Parameter named 'notNullable' should be not null!"));
        }
    }

    @Test(expected = IllegalArgumentException.class)
    public void shouldThrowExceptionOnCheckEmptyWhenGettingNullParameter() {
        checkNotEmpty("notEmpty",
                      (String) null);
    }

    @Test(expected = IllegalArgumentException.class)
    public void shouldThrowExceptionWhenGettinAllNullParameter() {
        checkEachParameterNotNull("notNullable",
                                  (Object) null);
    }

    @Test(expected = IllegalArgumentException.class)
    public void shouldThrowExceptionWhenGettingEmptyArray() {
        checkNotEmpty("empty",
                      new Object[]{});
    }

    @Test(expected = IllegalArgumentException.class)
    public void shouldThrowExceptionWhenGettingEmptyParameter() {
        checkNotEmpty("notEmpty",
                      "");
    }

    @Test(expected = IllegalStateException.class)
    public void shouldThrowExceptionWhenGettingInvalidConditionParameter() {
        checkCondition("valid",
                       false);
    }

    @Test(expected = IllegalArgumentException.class)
    public void shouldThrowExceptionWhenGettingNonNullParameter() {
        checkNullMandatory("nullable",
                           "non null");
    }

    @Test(expected = IllegalArgumentException.class)
    public void shouldThrowExceptionWhenGettingNullArray() {
        checkNotEmpty("empty",
                      (Object[]) null);
    }

    @Test(expected = IllegalArgumentException.class)
    public void shouldThrowExceptionWhenGettingNullParameter() {
        checkNotNull("notNullable",
                     null);
    }

    @Test(expected = IllegalArgumentException.class)
    public void shouldThrowExceptionWhenGettingSpacedParameter() {
        checkNotEmpty("notEmpty",
                      "    ");
    }

    @Test(expected = IllegalArgumentException.class)
    public void shouldThrowExceptionWhenGettinOneNullParameter() {
        checkEachParameterNotNull("notNullable",
                                  "nonNull",
                                  null);
    }
}