feat: form matches from queue projections

server/domain/matcher_test.go

@@ -66,3 +66,38 @@ func TestSelectCandidatesRejectsNoCommonRegion(t *testing.T) {
 		t.Fatal("selected players without a common <=100ms region")
 	}
 }
+
+func TestFormFromQueueUsesServerProjectionAndBalancesTeams(t *testing.T) {
+	now := time.Unix(100000, 0)
+	queue := NewQueue()
+	for _, id := range []string{"c", "a", "b", "d"} {
+		candidate := candidate(id, 1500, time.Second, 40, 45, now)
+		if _, err := queue.Create(candidate.PlayerID, candidate.TicketID, "create-key-"+id+"-123456", candidate, now.Add(-time.Duration(len(id))*time.Millisecond)); err != nil {
+			t.Fatal(err)
+		}
+	}
+	formation, err := FormFromQueue(queue, 4, now)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if formation.Selection.Players[0].TicketID != "a" || formation.Selection.Region != "EU" || len(formation.Teams.Team0) != 2 || len(formation.Teams.Team1) != 2 {
+		t.Fatalf("formation = %+v", formation)
+	}
+	seen := map[string]bool{}
+	for _, player := range append(formation.Teams.Team0, formation.Teams.Team1...) {
+		if seen[player.PlayerID] {
+			t.Fatalf("duplicate player in teams: %s", player.PlayerID)
+		}
+		seen[player.PlayerID] = true
+	}
+}
+
+func TestSelectCandidatesRejectsMalformedCandidateInsteadOfTrustingIt(t *testing.T) {
+	now := time.Unix(100000, 0)
+	anchor := candidate("a", 1500, 0, 40, 40, now)
+	malformed := candidate("b", 1500, 0, 40, 40, now)
+	malformed.PlayerID = anchor.PlayerID
+	if _, err := SelectCandidates(anchor, []Candidate{malformed}, 2, now); err == nil {
+		t.Fatal("duplicate player candidate accepted")
+	}
+}