/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.springframework.cloud.alibaba.dubbo.http.matcher;

import org.junit.Assert;
import org.junit.Test;
import org.springframework.beans.BeanUtils;
import org.springframework.core.ResolvableType;

import java.lang.reflect.Constructor;

/**
 * {@link AbstractNameValueExpression} Test
 *
 * @author <a href="mailto:mercyblitz@gmail.com">Mercy</a>
 */
public abstract class AbstractNameValueExpressionTest<T extends AbstractNameValueExpression> {

    protected T createExpression(String expression) {
        ResolvableType resolvableType = ResolvableType.forType(getClass().getGenericSuperclass());
        Class<T> firstGenericType = (Class<T>) resolvableType.resolveGeneric(0);
        Constructor<T> constructor = null;
        try {
            constructor = firstGenericType.getDeclaredConstructor(String.class);
        } catch (NoSuchMethodException e) {
            throw new RuntimeException(e);
        }
        return BeanUtils.instantiateClass(constructor, expression);
    }

    @Test
    public void testGetNameAndValue() {
        // Normal Name and value
        AbstractNameValueExpression expression = createExpression("a=1");
        Assert.assertEquals("a", expression.getName());
        Assert.assertFalse(expression.isNegated());

        expression = createExpression("a=1");
        Assert.assertEquals("a", expression.getName());
        Assert.assertEquals("1", expression.getValue());
        Assert.assertFalse(expression.isNegated());

        // Negated Name
        expression = createExpression("!a");
        Assert.assertEquals("a", expression.getName());
        Assert.assertTrue(expression.isNegated());

        expression = createExpression("a!=1");
        Assert.assertEquals("a", expression.getName());
        Assert.assertEquals("1", expression.getValue());
        Assert.assertTrue(expression.isNegated());
    }

    @Test
    public void testEqualsAndHashCode() {
        Assert.assertEquals(createExpression("a"), createExpression("a"));
        Assert.assertEquals(createExpression("a").hashCode(), createExpression("a").hashCode());
        Assert.assertEquals(createExpression("a=1"), createExpression("a = 1 "));
        Assert.assertEquals(createExpression("a=1").hashCode(), createExpression("a = 1 ").hashCode());
        Assert.assertNotEquals(createExpression("a"), createExpression("b"));
        Assert.assertNotEquals(createExpression("a").hashCode(), createExpression("b").hashCode());
    }
}
