contractcourt: test commitment deadline logic

This commit adds two tests to check that a) the correct deadline is used
given different HTLC sets and b) when sweeping anchors the correct
deadlines are used.

contractcourt/commit_sweep_resolver_test.go

@@ -109,7 +109,7 @@ type mockSweeper struct {
 	sweepErr          error
 	createSweepTxChan chan *wire.MsgTx
 
-	deadlines []uint32
+	deadlines []int
 }
 
 func newMockSweeper() *mockSweeper {
@@ -118,7 +118,7 @@ func newMockSweeper() *mockSweeper {
 		updatedInputs:     make(chan wire.OutPoint),
 		sweepTx:           &wire.MsgTx{},
 		createSweepTxChan: make(chan *wire.MsgTx),
-		deadlines:         []uint32{},
+		deadlines:         []int{},
 	}
 }
 
@@ -129,7 +129,7 @@ func (s *mockSweeper) SweepInput(input input.Input, params sweep.Params) (
 
 	// Update the deadlines used if it's set.
 	if params.Fee.ConfTarget != 0 {
-		s.deadlines = append(s.deadlines, params.Fee.ConfTarget)
+		s.deadlines = append(s.deadlines, int(params.Fee.ConfTarget))
 	}
 
 	result := make(chan sweep.Result, 1)