android - Unable to use MatrixCursor.newRow() in Robolectric -

i have contentprovider attempting call matrixcursor.newrow(). crashing nullpointerexception in private method matrixcursor.ensurecapacity(). debugging this, see matrixcursor.data null (appears shadowmatrixcursor not instantiate in constructor).

i'm using latest robolectric jar, version 2.2.

@runwith(robolectrictestrunner.class) public class matrixcursortest {      @test     public void thiscrashesinnewrow() {         matrixcursor c = new matrixcursor(new string[] { "test", "cols" }, 1);         matrixcursor.rowbuilder b = c.newrow();  // crashes npe     } } 

i'm trying understand how can around this. i've tried creating "myshadowmatrixcursor" follows, don't see how can override behavior of newrow() return empty rowbuilder (whose constructor default/package-private, not accessible shadow.)

import android.database.matrixcursor; import android.database.matrixcursor.rowbuilder;  import org.robolectric.annotation.implementation; import org.robolectric.annotation.implements; import org.robolectric.annotation.realobject;  @implements(value = matrixcursor.class, inheritimplementationmethods = true) public class myshadowmatrixcursor extends org.robolectric.shadows.shadowmatrixcursor {      @realobject     private matrixcursor cursor;      @implementation     public rowbuilder newrow() {         // causes infinite loop because shadow intercepts again:         return cursor.newrow();           // doesn't work because rowbuilder constructor package-private         ...return cursor.new rowbuilder()           // how can return instance of matrixcursor.rowbuilder instead?     }      @implementation     public void ensurecapacity(int i) {         // override private ensurecapacity         // nothing     } } 

so, questions code above:

1. how can return instance of matrixcursor.rowbuilder?

2. is possible shadow private method i'm attempting ensurecapacity() above? edit: yes, make "public" in shadow class.

pretty new robolectric, i'm overlooking?

edit: figured out how override private method making public in shadow class. however, i'm getting npes elsewhere state of matrixcursor doesn't appear set @ all?

erich suggested try robolectric 2.3-snapshot build, did , indeed fix issue. see https://groups.google.com/forum/#!topic/robolectric/i5z5n5nh4pw.

unrelated, 2 new issues occurring contentresolver.gettype() submitted patch here: https://github.com/robolectric/robolectric/pull/954 , still working on contentprovider.openfile().