@Test
public void cxx() {

  // Prepare mock parameters
  ContentEntry contentEntry = mock(ContentEntry.class);
  NdkVariant mockNdkVariant = mock(NdkVariant.class);
  when (mockNdkVariant.getSourceFolders()).thenReturn(Collections.emptyList());
  when(myNdkModuleModel.getSelectedVariant()).thenReturn(mockNdkVariant);
  // Execute step
  myNdkContentEntriesSetup.execute(Collections.singletonList(contentEntry));
  // Verify exclusion
  File excludePath = new File(myNdkModuleModel.getRootDirPath(), ".cxx");
  verify(contentEntry).addExcludeFolder(pathToIdeaUrl(excludePath));
}