@PluginTestAssertion

package com.smartbear.ready.plugin.template.factories;

import com.eviware.soapui.config.TestAssertionConfig;
import com.eviware.soapui.impl.wsdl.panels.assertions.AssertionCategoryMapping;
import com.eviware.soapui.impl.wsdl.TestSteps.WsdlMessageAssertion;
import com.eviware.soapui.model.iface.MessageExchange;
import com.eviware.soapui.model.iface.SubmitContext;
import com.eviware.soapui.model.testsuite.Assertable;
import com.eviware.soapui.model.testsuite.AssertionError;
import com.eviware.soapui.model.testsuite.AssertionException;
import com.eviware.soapui.model.testsuite.ResponseAssertion;
import com.eviware.soapui.plugins.auto.PluginTestAssertion;
import com.eviware.soapui.support.StringUtils;
import net.sf.json.JSONSerializer;

@PluginTestAssertion(id = "SampleTestAssertionId", label = "Sample JSON Content Assertion",
category = AssertionCategoryMapping.VALIDATE_RESPONSE_CONTENT_CATEGORY,
description = "Asserts that the response message is a valid JSON string")

public class SampleTestAssertion extends WsdlMessageAssertion implements ResponseAssertion {

/**
* Assertions need to have a constructor that takes TestAssertionConfig and ModelItem to be asserted
*/

public SampleTestAssertion(TestAssertionConfig assertionConfig, Assertable modelItem) {
super(assertionConfig, modelItem, true, false, false, true);
}

@Override
protected String internalAssertResponse(MessageExchange messageExchange, SubmitContext submitContext) throws AssertionException {

try {
String content = messageExchange.getResponse().getContentAsString();
if (StringUtils.isNullOrEmpty(content)) {
return "Response is empty – not a valid JSON response";
}

JSONSerializer.toJSON(messageExchange.getResponse().getContentAsString());
} catch (Exception e) {
throw new AssertionException(new AssertionError("JSON Parsing failed; [" + e.toString() + "]"));
}

return "Response is valid JSON";
}
}