简单了解Java断言利器AssertJ原理及用法

import java.math.BigDecimal;

import org.assertj.core.api.AbstractAssert;
import org.assertj.core.api.AbstractBigDecimalAssert;
import org.assertj.core.api.AbstractBooleanAssert;
import org.assertj.core.api.AbstractCharSequenceAssert;
import org.assertj.core.api.AbstractIntegerAssert;
import org.assertj.core.api.Assertions;

import com.alibaba.fastjson.JSONObject;
import com.alibaba.fastjson.JSONPath;


/**
 * assertJ json数据判断增强 eg:不提供提取数组的方法，在断言中作用比较小
 * 
 * @author jacksoncina2008
 *
 */
public class AssertJSON extends AbstractAssert<AssertJSON, String> {

  protected AssertJSON(String actual) {
    super(actual, AssertJSON.class);
    // TODO Auto-generated constructor stub
  }

  public static AssertJSON assertThat(String json) {
    return new AssertJSON(json);
  }

  /**
   * 提取字符串节点
   */
  public AbstractCharSequenceAssert<?, String> jsonPathAsString(String path) {
    return Assertions.assertThat((String) JSONPath.eval(getJSON(actual), path));
  }

  /**
   * 提取boolean节点
   */

  public AbstractBooleanAssert<?> jsonPathAsBoolean(String path) {
    return Assertions.assertThat((boolean) JSONPath.eval(getJSON(actual), path));
  }



  /**
   * 提取数字节点
   *
   */
  public AbstractIntegerAssert<?> jsonPathAsInteger(String path) {
    return Assertions.assertThat((Integer) JSONPath.eval(getJSON(actual), path));
  }

  /**
   * 提取小数
   * 
   */

  public AbstractBigDecimalAssert<?> jsonPathAsBigDecimal(String path) {
    return Assertions.assertThat((BigDecimal) JSONPath.eval(getJSON(actual), path));
  }

  private JSONObject getJSON(String json) {
    JSONObject j = new JSONObject();
    j = JSONObject.parseObject(json);
    return j;
  }
}