Fix a test.

Author: bobg

msg.go

@@ -128,7 +128,7 @@ func (e *Msg) acceptsNominatedSet() ValueSet {
 	case e.T.NomPrepTopic != nil:
 		return e.T.NomPrepTopic.Y
 	}
-	return nil // not reached
+	return nil
 }
 
 // Returns the set of ballots for which e votes or accepts "prepared."

msg_test.go

@@ -29,30 +29,40 @@ func TestAcceptsNominated(t *testing.T) {
 			wantA:  []int{2},
 			wantVA: []int{1, 2},
 		},
+		{
+			m: &Topic{
+				NomPrepTopic: &NomPrepTopic{
+					NomTopic:  NomTopic{X: ValueSet{valtype(1)}, Y: ValueSet{valtype(2)}},
+					PrepTopic: PrepTopic{B: Ballot{1, valtype(1)}},
+				},
+			},
+			wantA:  []int{2},
+			wantVA: []int{1, 2},
+		},
 		{
 			m:      &Topic{PrepTopic: &PrepTopic{B: Ballot{1, valtype(1)}}},
-			wantA:  []int{1},
-			wantVA: []int{1},
+			wantA:  []int{},
+			wantVA: []int{},
 		},
 		{
 			m:      &Topic{PrepTopic: &PrepTopic{B: Ballot{1, valtype(1)}, P: Ballot{1, valtype(2)}}},
-			wantA:  []int{1, 2},
-			wantVA: []int{1, 2},
+			wantA:  []int{},
+			wantVA: []int{},
 		},
 		{
 			m:      &Topic{PrepTopic: &PrepTopic{B: Ballot{1, valtype(1)}, P: Ballot{1, valtype(2)}, PP: Ballot{1, valtype(3)}}},
-			wantA:  []int{1, 2, 3},
-			wantVA: []int{1, 2, 3},
+			wantA:  []int{},
+			wantVA: []int{},
 		},
 		{
 			m:      &Topic{CommitTopic: &CommitTopic{B: Ballot{1, valtype(1)}}},
-			wantA:  []int{1},
-			wantVA: []int{1},
+			wantA:  []int{},
+			wantVA: []int{},
 		},
 		{
 			m:      &Topic{ExtTopic: &ExtTopic{C: Ballot{1, valtype(1)}}},
-			wantA:  []int{1},
-			wantVA: []int{1},
+			wantA:  []int{},
+			wantVA: []int{},
 		},
 	}
 	for i, tc := range cases {