JsonStringMatcher.java

package org.kata.util.matchers;

import org.hamcrest.Description;
import org.json.JSONException;
import org.mockito.ArgumentMatcher;
import org.skyscreamer.jsonassert.JSONCompare;
import org.skyscreamer.jsonassert.JSONCompareMode;
import org.skyscreamer.jsonassert.JSONCompareResult;

import static org.mockito.Matchers.argThat;

/**
 * Created by kmajetic on 14.05.15..
 */
public class JsonStringMatcher extends ArgumentMatcher<String> {

    private final String expected;

    public JsonStringMatcher(String expected) {
        this.expected = expected;
    }

    public static String jsonEq(String expected) {
        return argThat(new JsonStringMatcher(expected));
    }

    @Override
    public boolean matches(Object argument) {
        if (expected == null)
            return argument == null;

        if (!(argument instanceof String))
            return false;

        try {
            return compare(expected, (String) argument);
        } catch (JSONException e) {
            return false;
        }
    }

    private boolean compare(String expected, String argument) throws JSONException {
        JSONCompareResult result = JSONCompare.compareJSON(expected, argument, JSONCompareMode.LENIENT);
        if (result.failed()) {
            System.out.println(String.format("expected=%s actual=%s", expected, argument));
            return false;
        }

        return true;
    }

    @Override
    public void describeTo(Description description) {
        description.appendText(expected.toString());
    }
}