CODEWITHSUNDEEP
androidtestingshadowrobolectric
Freewind
Freewind

Reputation: 198318

What can I do if there is no shadow method found for some methods with robolectric?

I'm using Robolectric to test android code, and found there are some tests failed because there are some methods don't have shadow method.

In my logic code, I retrieved a bitmap from another activity:

Bitmap bitmap = getBitmapFromResult(data);
BitmapDrawable drawable = new BitmapDrawable(getResources(), bitmap);
imageView.setImageDrawable(drawable);

And later in another method, I get the bitmap from the imageView, and save it to file:

BitmapDrawable drawable = (BitmapDrawable)imageView.getDrawable();
Bitmap bitmap = drawable.getBitmap();
// save to file
bitmap.compress(...);

But the last line throws NullPointerException when testing.

I debugged into the code, and found when the test code running with robolectric, the drawable is a ShadowBitmapDrawable contains a null bitmap. So drawable.getBitmap() return a null which causes the exception.

Then I enabled logging in my test code:

Robolectric.logMissingInvokedShadowMethods();

Found one line in console which I think causes my test code failed:

No Shadow method found for BitmapDrawable.<init>(android.content.res.Resources, android.graphics.Bitmap)

What can I do now? Is it possible to add a shadow method to fix it and how to do that?

Upvotes: 0

Views: 329

Answers (1)

Freewind
Freewind

Reputation: 198318

Clone the source from github: https://github.com/pivotal/robolectric/

Add a shadow method to ShadowBitmapDrawable.java:

public void __constructor__(android.content.res.Resources res, Bitmap bitmap) {
    this.bitmap = bitmap;
}

Then compile it and package it to a jar. It's fixed.

Upvotes: 2

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