jstests/core/capped_convertToCapped1.js


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// test cloneCollectionAsCapped

source = db.capped_convertToCapped1;
dest = db.capped_convertToCapped1_clone;

source.drop();
dest.drop();

N = 1000;

for( i = 0; i < N; ++i ) {
    source.save( {i:i} );
}
assert.eq( N, source.count() );

// should all fit
res = db.runCommand( { cloneCollectionAsCapped:source.getName(),
                       toCollection:dest.getName(),
                       size:100000 } );
assert.commandWorked( res );
assert.eq( source.count(), dest.count() );
assert.eq( N, source.count() ); // didn't delete source

dest.drop();
// should NOT all fit
assert.commandWorked( db.runCommand( { cloneCollectionAsCapped:source.getName(),
                                       toCollection:dest.getName(),
                                       size:1000 } ) );


assert.eq( N, source.count() ); // didn't delete source
assert.gt( source.count(), dest.count() );