/*
 * Copyright 2000-2016 Vaadin Ltd.
 *
 * 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 com.vaadin.v7.tests.server.component.abstractfield;

import java.util.ArrayList;
import java.util.List;

import org.junit.Assert;
import org.junit.Test;

import com.vaadin.v7.tests.VaadinClasses;
import com.vaadin.v7.ui.Field;
import com.vaadin.v7.ui.Slider;

public class FieldDefaultValuesTest {

    @Test
    public void testFieldsHaveDefaultValueAfterClear() throws Exception {
        for (Field<?> field : createFields()) {
            Object originalValue = field.getValue();

            field.clear();

            Object clearedValue = field.getValue();

            Assert.assertEquals(
                    "Expected to get default value after clearing "
                            + field.getClass().getName(),
                    originalValue, clearedValue);
        }
    }

    @Test
    public void testFieldsAreEmptyAfterClear() throws Exception {
        int count = 0;
        for (Field<?> field : createFields()) {
            count++;
            field.clear();

            if (field instanceof Slider) {
                Assert.assertFalse(
                        "Slider should not be empty even after being cleared",
                        field.isEmpty());

            } else {
                Assert.assertTrue(
                        field.getClass().getName()
                                + " should be empty after being cleared",
                        field.isEmpty());
            }
        }
        Assert.assertTrue(count > 0);
    }

    @SuppressWarnings("rawtypes")
    private static List<Field<?>> createFields()
            throws InstantiationException, IllegalAccessException {
        List<Field<?>> fieldInstances = new ArrayList<>();

        for (Class<? extends Field> fieldType : VaadinClasses.getFields()) {
            fieldInstances.add(fieldType.newInstance());
        }
        return fieldInstances;
    }

}