feat: add serializable matchmaking store boundary

server/store/serializable_test.go

@@ -0,0 +1,40 @@
+package store
+
+import (
+	"errors"
+	"testing"
+)
+
+func TestRetryableRecognisesPostgresSerializationAndDeadlockErrors(t *testing.T) {
+	for _, message := range []string{"pq: 40001 serialization_failure", "ERROR: deadlock detected (40P01)"} {
+		if !retryable(errors.New(message)) {
+			t.Fatalf("not retryable: %q", message)
+		}
+	}
+	for _, message := range []string{"duplicate key value violates unique constraint", "invalid input syntax"} {
+		if retryable(errors.New(message)) {
+			t.Fatalf("incorrectly retryable: %q", message)
+		}
+	}
+}
+
+func TestClaimSQLContainsDurableOwnershipFences(t *testing.T) {
+	for _, fragment := range []string{"FOR UPDATE SKIP LOCKED", "state = 'QUEUED'", "proposal_participants", "revision = revision + 1"} {
+		if !containsAnySQL(fragment) {
+			t.Fatalf("claim boundary missing %q", fragment)
+		}
+	}
+}
+
+func containsAnySQL(fragment string) bool {
+	return index(CandidateClaimSQL, fragment) >= 0 || index(ProposalParticipantInsertSQL, fragment) >= 0 || index(QueueTicketProposeSQL, fragment) >= 0
+}
+
+func index(s, fragment string) int {
+	for i := 0; i+len(fragment) <= len(s); i++ {
+		if s[i:i+len(fragment)] == fragment {
+			return i
+		}
+	}
+	return -1
+}