Function TEST

pj_datastore/tests/array_expansion_test.cpp:21–43

// ─────────────────────────────────────────────────────────────────

TEST(ArrayExpansionTest, FixedSizeArray_Primitive_ProducesNColumns) {
  // Schema: struct msg { float32[3] accel }
  // Expected: 3 columns named accel[0], accel[1], accel[2]
  DataEngine engine;
  DatasetId ds = *engine.createDataset(PJ::DatasetDescriptor{.source_name = "t"});
  DataWriter writer = engine.createWriter();

  auto accel = PJ::makeArray("accel", PJ::makePrimitive("", PJ::PrimitiveType::kFloat32), 3u);
  auto root = PJ::makeStruct("msg", {accel});
  auto sid = *writer.registerSchema("msg_fixed", root);

  TopicDescriptor desc;
  desc.name = "imu";
  desc.schema_id = sid;
  auto topic_id = *writer.registerTopic(ds, desc);

  auto handle = *writer.bindTopicWriter(topic_id);
  ASSERT_EQ(handle.field_ids.size(), 3u);

  EXPECT_EQ(*writer.resolveField(topic_id, "accel[0]"), 0u);
  EXPECT_EQ(*writer.resolveField(topic_id, "accel[1]"), 1u);
  EXPECT_EQ(*writer.resolveField(topic_id, "accel[2]"), 2u);
}

TEST(ArrayExpansionTest, FixedSizeArray_StructElement_ProducesNxMColumns) {
  // Schema: struct msg { Pose[2] poses } where Pose = struct { float32 x, y, z }