[ntuple] Add named processor tests

Author: enirolf

tree/ntuple/v7/test/ntuple_processor.cxx

@@ -115,6 +115,13 @@ TEST_F(RNTupleProcessorTest, BaseWithBareModel)
 
    auto proc = RNTupleProcessor::Create(ntuple, std::move(model));
 
+   EXPECT_STREQ("ntuple", proc->GetProcessorName().c_str());
+
+   {
+      auto namedProc = RNTupleProcessor::Create(ntuple, "my_ntuple");
+      EXPECT_STREQ("my_ntuple", namedProc->GetProcessorName().c_str());
+   }
+
    int nEntries = 0;
 
    for (const auto &entry : *proc) {

tree/ntuple/v7/test/ntuple_processor_chain.cxx

@@ -103,6 +103,14 @@ TEST_F(RNTupleChainProcessorTest, Basic)
 
    std::uint64_t nEntries = 0;
    auto proc = RNTupleProcessor::CreateChain(ntuples);
+
+   EXPECT_STREQ("ntuple", proc->GetProcessorName().c_str());
+
+   {
+      auto namedProc = RNTupleProcessor::CreateChain(ntuples, "my_ntuple");
+      EXPECT_STREQ("my_ntuple", namedProc->GetProcessorName().c_str());
+   }
+
    auto x = proc->GetEntry().GetPtr<float>("x");
    for (const auto &entry : *proc) {
       EXPECT_EQ(++nEntries, proc->GetNEntriesProcessed());

tree/ntuple/v7/test/ntuple_processor_join.cxx

@@ -94,6 +94,12 @@ TEST_F(RNTupleJoinProcessorTest, Basic)
    ntuples = {{fNTupleNames[0], fFileNames[0]}};
 
    auto proc = RNTupleProcessor::CreateJoin(ntuples, {});
+   EXPECT_STREQ("ntuple1", proc->GetProcessorName().c_str());
+
+   {
+      auto namedProc = RNTupleProcessor::CreateJoin(ntuples, {}, "my_ntuple");
+      EXPECT_STREQ("my_ntuple", namedProc->GetProcessorName().c_str());
+   }
 
    int nEntries = 0;
    for (const auto &entry : *proc) {