Simplified tests [skip ci]

Author: ankane

test/pqxx_test.cpp

@@ -33,8 +33,7 @@ void test_vector(pqxx::connection &conn) {
 
     pqxx::nontransaction tx(conn);
     auto embedding = pgvector::Vector({1, 2, 3});
-    float arr[] = {4, 5, 6};
-    auto embedding2 = pgvector::Vector(std::span{arr, 3});
+    auto embedding2 = pgvector::Vector({4, 5, 6});
     tx.exec("INSERT INTO items (embedding) VALUES ($1), ($2), ($3)", {embedding, embedding2, std::nullopt});
 
     pqxx::result res = tx.exec("SELECT embedding FROM items ORDER BY embedding <-> $1", {embedding2});
@@ -49,8 +48,7 @@ void test_halfvec(pqxx::connection &conn) {
 
     pqxx::nontransaction tx(conn);
     auto embedding = pgvector::HalfVector({1, 2, 3});
-    pgvector::Half arr[] = {4, 5, 6};
-    auto embedding2 = pgvector::HalfVector(std::span{arr, 3});
+    auto embedding2 = pgvector::HalfVector({4, 5, 6});
     tx.exec("INSERT INTO items (half_embedding) VALUES ($1), ($2), ($3)", {embedding, embedding2, std::nullopt});
 
     pqxx::result res = tx.exec("SELECT half_embedding FROM items ORDER BY half_embedding <-> $1", {embedding2});