package com.github.dockerjava.test.serdes;

import com.fasterxml.jackson.core.type.TypeReference;

import com.fasterxml.jackson.databind.JavaType;

import com.fasterxml.jackson.databind.JsonNode;

import com.github.dockerjava.core.RemoteApiVersion;

import org.apache.commons.io.FileUtils;

import java.io.File;

import java.io.IOException;

import static org.junit.Assert.assertEquals;

import static org.junit.Assert.assertNotSame;

/**

* Samples helper

*

* @author Kanstantsin Shautsou

*/

public class JSONSamples {

/**

* Access to samples storage.

*

* @param version docker version of json sample

* @param context path to file for interested dump

* @return Content of JSON sample

* @throws IOException

*/

public static String getSampleContent(RemoteApiVersion version, String context) throws IOException {

File resource = new File("src/test/resources/samples/" + version.getVersion() + "/" + context);

return FileUtils.readFileToString(resource, "UTF-8");

}

public static <TClass> TClass testRoundTrip(RemoteApiVersion version, String context,

JavaType type) throws IOException {

final TClass tObject = JSONTestHelper.getMapper().readValue(getSampleContent(version, context), type);

return testRoundTrip(tObject, type);

}

/**

* Same as {@link JSONTestHelper#testRoundTrip(java.lang.Object, java.lang.Class)}

* but via {@link TypeReference}

*/

public static <TClass> TClass testRoundTrip(TClass item, JavaType type)

throws IOException, AssertionError {

String serialized1 = JSONTestHelper.getMapper().writeValueAsString(item);

JsonNode json1 = JSONTestHelper.getMapper().readTree(serialized1);

TClass deserialized1 = JSONTestHelper.getMapper().readValue(serialized1, type);

String serialized2 = JSONTestHelper.getMapper().writeValueAsString(deserialized1);

JsonNode json2 = JSONTestHelper.getMapper().readTree(serialized2);

TClass deserialized2 = JSONTestHelper.getMapper().readValue(serialized2, type);

assertEquals("JSONs must be equal after the second roundtrip", json2, json1);

assertEquals("Objects must be equal after the second roundtrip", deserialized2, deserialized2);

assertNotSame("Objects must be not the same", deserialized2, deserialized1);

return deserialized2;

}

}