@Test
public void testOffsetForFacetExtendsWithValidPrefix() throws Exception {

	// Expected: f1
	Couple couple = prepare( "app2", "edited2.graph", 140 );
	couple.text += "\nfacet myfacet {\n\textends: f";
	List<RoboconfCompletionProposal> proposals = couple.proposer.findProposals( couple.text );
	Assert.assertEquals( 1, proposals.size());
	Assert.assertEquals( "f1", proposals.get( 0 ).getProposalName());
	Assert.assertEquals( "f1", proposals.get( 0 ).getProposalString());
	Assert.assertNull( proposals.get( 0 ).getProposalDescription());
	Assert.assertEquals( 1, proposals.get( 0 ).getReplacementOffset());
}