When I run the following unit test on the sendCommand Method, I get a null pointer exception. How do I format my JSON Object to properly Unit
My Unit test:
@Test(expected = IllegalStateException.class)
public void shouldThrowIllegalStateExceptionOnUnknownCommand() {
try {
JSONObject test = new JSONObject();
test.put("name", "UnitTest");
test.put("payload", "{ \"example\": \"payload\" }");
testClassObject.sendCommand(test);
} catch (JSONException e) {
Log.e(TAG, "failed to parse JSON Object Unit test" e.getMessage());
}
}
My Method:
public void sendCommand(JSONObject reader) {
try {
String commandName = reader.getString("name");
JSONObject data = reader.getJSONObject("payload");
switch (commandName)
{
case "ValidCommand":
//Do Stuff
break;
default:
Log.i(TAG, "Unknown command");
throw new IllegalStateException("Unknown command: " commandName);
}
} catch (JSONException e) {
Log.e(TAG, " Failed to parse JSON Object / array " e.getMessage());
}
}
My Error message:
Unexpected exception, expected<java.lang.IllegalStateException> but was<java.lang.NullPointerException>
java.lang.Exception: Unexpected exception, expected<java.lang.IllegalStateException> but was<java.lang.NullPointerException>
at org.junit.internal.runners.statements.ExpectException.evaluate(ExpectException.java:28)
This error message is occurring at the Switch statement of sendCommand().
CodePudding user response:
reader.getJSONObject("payload")
isn't a JSONObject
- it's a String
you should add this when you create you test object
test.put("payload", new JSONObject("{ \"example\": \"payload\" }"));