What is the test for warrantless entry by the police into a house?

"`[A] warrantless entry by the police into a residence is at least presumptively unreasonable and therefore unlawful.' (People v. Williams (1988) 45 Cal.3d 1268, 1297, 248 Cal.Rptr. 834, 756 P.2d 221.) As the United States Supreme Court has explained: 'In terms that apply equally to seizures of property and to seizures of persons, the Fourth Amendment has drawn a firm line at the entrance to the house. Absent exigent circumstances, that

[105 Cal.Rptr.2d 816]