如何“单元测试"? android上的json解析(JSONObject =="null")?

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我有一些问题.我已经创建了JSONParser，并且需要对其进行单元测试.但是，如果我尝试传递带有有效JSON副本的String对象，则每次作为解析器一部分的JSONObject的值都为null.

I have some problems. I've created JSONParser and need to make a unit tests on it. But, if I'm trying to pass a String object with a copy of valid JSON, every time JSONObject, which is part of my Parser have a value of null.

这里是例子.

我要分配给字符串的JSON:

JSON I'm assigning to the String:

public class JSONParserTest { private JSONParser parser; private Translations translations; private String nounsAndAdjectivesJson = "{\"head\":{},\"def\":[{\"text\":\"house\",\"pos\":\"noun\",\"ts\":\"haʊs\",\"tr\":[{\"text\":\"дом\",\"pos\":\"существительное\",\"gen\":\"м\",\"syn\":[{\"text\":\"домик\",\"pos\":\"существительное\",\"gen\":\"м\"},{\"text\":\"хаус\",\"pos\":\"существительное\",\"gen\":\"м\"}],\"mean\":[{\"text\":\"home\"},{\"text\":\"cottage\"}],\"ex\":[{\"text\":\"white house\",\"tr\":[{\"text\":\"белый дом\"}]},{\"text\":\"wooden house\",\"tr\":[{\"text\":\"деревянный домик\"}]}]},{\"text\":\"помещение\",\"pos\":\"существительное\",\"gen\":\"ср\",\"syn\":[{\"text\":\"здание\",\"pos\":\"существительное\",\"gen\":\"ср\"}],\"mean\":[{\"text\":\"room\"},{\"text\":\"building\"}],\"ex\":[{\"text\":\"house of parliament\",\"tr\":[{\"text\":\"здание парламента\"}]}]},{\"text\":\"гостиница\",\"pos\":\"существительное\",\"gen\":\"ж\",\"mean\":[{\"text\":\"hotel\"}]},{\"text\":\"семья\",\"pos\":\"существительное\",\"gen\":\"ж\",\"mean\":[{\"text\":\"family\"}]},{\"text\":\"хозяйство\",\"pos\":\"существительное\",\"gen\":\"ср\",\"mean\":[{\"text\":\"farm\"}]},{\"text\":\"театр\",\"pos\":\"существительное\",\"gen\":\"м\",\"mean\":[{\"text\":\"theatre\"}]},{\"text\":\"палата\",\"pos\":\"существительное\",\"gen\":\"ж\",\"mean\":[{\"text\":\"chamber\"}],\"ex\":[{\"text\":\"house of representatives\",\"tr\":[{\"text\":\"палата представителей\"}]}]},{\"text\":\"жилье\",\"pos\":\"существительное\",\"gen\":\"ср\",\"syn\":[{\"text\":\"жилище\",\"pos\":\"существительное\",\"gen\":\"ср\"}],\"mean\":[{\"text\":\"housing\"}],\"ex\":[{\"text\":\"safe houses\",\"tr\":[{\"text\":\"безопасное жилье\"}]},{\"text\":\"traditional house\",\"tr\":[{\"text\":\"традиционное жилище\"}]}]},{\"text\":\"род\",\"pos\":\"существительное\",\"gen\":\"м\",\"mean\":[{\"text\":\"kind\"}]},{\"text\":\"рубка\",\"pos\":\"существительное\",\"gen\":\"ж\",\"mean\":[{\"text\":\"cutting\"}]},{\"text\":\"династия\",\"pos\":\"существительное\",\"gen\":\"ж\",\"mean\":[{\"text\":\"dynasty\"}]},{\"text\":\"публика\",\"pos\":\"существительное\",\"gen\":\"ж\",\"mean\":[{\"text\":\"audience\"}]},{\"text\":\"биржа\",\"pos\":\"существительное\",\"gen\":\"ж\",\"mean\":[{\"text\":\"market\"}]}]},{\"text\":\"house\",\"pos\":\"adjective\",\"ts\":\"haʊs\",\"tr\":[{\"text\":\"домашний\",\"pos\":\"прилагательное\",\"mean\":[{\"text\":\"home\"}],\"ex\":[{\"text\":\"house arrest\",\"tr\":[{\"text\":\"домашний арест\"}]}]},{\"text\":\"домовый\",\"pos\":\"прилагательное\",\"ex\":[{\"text\":\"house mouse\",\"tr\":[{\"text\":\"домовая мышь\"}]}]},{\"text\":\"комнатный\",\"pos\":\"прилагательное\",\"mean\":[{\"text\":\"room\"}]}]},{\"text\":\"house\",\"pos\":\"verb\",\"ts\":\"haʊs\",\"tr\":[{\"text\":\"расквартировывать\",\"pos\":\"глагол\",\"asp\":\"несов\"},{\"text\":\"размещаться\",\"pos\":\"глагол\",\"asp\":\"несов\",\"mean\":[{\"text\":\"host\"}]},{\"text\":\"жить\",\"pos\":\"глагол\",\"asp\":\"несов\",\"mean\":[{\"text\":\"live\"}]},{\"text\":\"вмещать\",\"pos\":\"глагол\",\"asp\":\"несов\",\"mean\":[{\"text\":\"accommodate\"}]},{\"text\":\"поселить\",\"pos\":\"глагол\",\"asp\":\"сов\",\"syn\":[{\"text\":\"приютить\",\"pos\":\"глагол\",\"asp\":\"сов\"}],\"mean\":[{\"text\":\"settle\"},{\"text\":\"shelter\"}]},{\"text\":\"помещать\",\"pos\":\"глагол\",\"asp\":\"несов\",\"mean\":[{\"text\":\"place\"}]}]}]}"; private String verbsJson = "{\"head\":{},\"def\":[{\"text\":\"peek\",\"pos\":\"verb\",\"ts\":\"piːk\",\"tr\":[{\"text\":\"взглянуть\",\"pos\":\"глагол\",\"asp\":\"сов\",\"syn\":[{\"text\":\"заглянуть\",\"pos\":\"глагол\",\"asp\":\"сов\"},{\"text\":\"заглядывать\",\"pos\":\"глагол\",\"asp\":\"несов\"}],\"mean\":[{\"text\":\"glance\"},{\"text\":\"look\"}],\"ex\":[{\"text\":\"peek inside\",\"tr\":[{\"text\":\"заглянуть внутрь\"}]}]},{\"text\":\"выглянуть\",\"pos\":\"глагол\",\"asp\":\"сов\",\"syn\":[{\"text\":\"выглядывать\",\"pos\":\"глагол\",\"asp\":\"несов\"},{\"text\":\"подглядывать\",\"pos\":\"глагол\",\"asp\":\"несов\"}],\"mean\":[{\"text\":\"look\"},{\"text\":\"peep\"}]}]},{\"text\":\"peek\",\"pos\":\"noun\",\"ts\":\"piːk\",\"tr\":[{\"text\":\"быстрый взгляд\",\"pos\":\"существительное\",\"mean\":[{\"text\":\"quick look\"}]},{\"text\":\"взгляд украдкой\",\"pos\":\"существительное\"},{\"text\":\"пик\",\"pos\":\"существительное\",\"gen\":\"м\",\"mean\":[{\"text\":\"peak\"}]}]}]}"; @Before public void setUp() throws Exception { translations = new Translations(); } @Test public void testVerbsOnlyParsing() throws JSONException{ JSONObject jsonObject = new JSONObject(verbsJson); parser = new JSONParser(jsonObject); translations = parser.getTranslations(); Assert.assertNotNull(translations.getVerbs()); } }

我的JSONParser单元测试

My unit-test of JSONParser

@Test public void testVerbsOnlyParsing() throws JSONException, IOException { parser = new JSONParser(verbsJson); translations = parser.getTranslations(); Assert.assertNotNull(translations.getVerbs()); }

还有JSONParser的一部分，在初始化JSONObject的过程中存在从String获取数据的问题:

And a part of JSONParser, which have a problem of getting data from String during the initialization of JSONObject:

public class JSONParser { private Translations translations; public JSONParser(String response) throws JSONException { translations = new Translations(); parseJSON(response); } private void parseJSON(String response) throws JSONException { JSONObject object = new JSONObject(response); //object == "null" JSONArray arrayOfDefinitions = getArray(object, DEFINITION); parseArray(arrayOfDefinitions, TRANSLATIONS); }

我真的不知道是什么原因引起的(JSONObject对象=="null")，请问您能帮我吗?

I really don't know what cause the problem (JSONObject object == "null"), could you help me please?

推荐答案

TL; DR:将此添加到您的build.gradle文件:

TL;DR: add this to your build.gradle file:

testCompile "org.json:json:20140107"

这将用在桌面上可用的库替换已存根的Android库.

This will replace the stubbed Android library with one that works on the desktop.

请参阅此帖子以获取详细说明 medium/@yair.kukielka/android-unit-tests-explained-219b04dc55b5#.qnsgqo7qf

See this post for a great explanation medium/@yair.kukielka/android-unit-tests-explained-219b04dc55b5#.qnsgqo7qf