JSONObject Unit Testing Always Null

Question

I have been looking at this for an hour and can't seem to see what's wrong.

JSONObject jsonResponse = new JSONObject();
jsonResponse.put("JSON", "hi");
String myString = jsonResponse.getString("JSON");
assertEquals("hi", myString);

Result... (The entire method throws Throwable). I tried try/catch as well. Same result....

java.lang.AssertionError: 
Expected :hi
Actual   :null

This is the class I am using

public class ECUserTests(){

    @org.junit.Test
    public void testUserExists(){

        try{
            JSONObject jsonResponse = new JSONObject();
            jsonResponse.put("JSON", "Hello, World!");
            String myString = jsonResponse.getString("JSON");
            assertEquals("hi", myString);
        }catch(JSONException e){
            e.printStackTrace();
        }

Can you post code for a minimal program that can be run? I dropped the above into a Java class and ran it successfully. (My only modification was changing assertEquals to Assert.assertEquals.) — cherdt
– cherdt, Commented Sep 25, 2015 at 20:30
The answer for your question is here: stackoverflow.com/a/35675861/3032209 — Yair Kukielka
– Yair Kukielka, Commented Feb 27, 2016 at 21:50

hgoebl · Accepted Answer · 2015-09-25 21:14:50Z

9

I suppose you're running the unit test outside of Android and compiling against android.jar. This lib contains only class and interface signatures without any implementation.

Solution:

Either execute the unit test in Android context (not on PC) or when running on PC, you have to load the "real" JSON library into your test.

answered Sep 25, 2015 at 21:14

hgoebl

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3 Comments

user872985 Over a year ago

How do I load the "real" JSON library into a test?

hgoebl Over a year ago

What do you use? Gradle, Maven, ...? In Gradle and Maven you can define a compile/test dependency to org.json.

user872985 Over a year ago

Thanks. I use gradle and after adding "testCompile 'org.json:json:20140107'" to build.gradle I can now use JSONObjects in tests.

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