test standalone glob utility

Author: m-fila

tests/root_io/read_glob.cpp

@@ -1,4 +1,5 @@
 #include "podio/Reader.h"
+#include "podio/utilities/Glob.h"
 #if PODIO_ENABLE_DATASOURCE
   #include "podio/DataSource.h"
 #endif
@@ -11,11 +12,29 @@
 int main() {
   const auto pattern = "example_frame_?.root";
   const auto expected_events = 20;
-  const auto reader = podio::makeReader(pattern);
-  reader.getEvents();
-  ASSERT((reader.getEntries(podio::Category::Event) == expected_events), "Reader read invalid number of events");
+  // standalone globbing
+
+  ASSERT(podio::utils::is_glob_pattern(pattern), "Failed to recognize glob pattern");
+  auto files = podio::utils::expand_glob(pattern);
+  ASSERT(files.size() == 2, "Glob expanded to a wrong number of files");
+  ASSERT(files[0] == "example_frame_0.root", "Glob expanded to an unexpected file");
+  ASSERT(files[1] == "example_frame_1.root", "Glob expanded to an unexpected file");
+  {
+    // externally resolved glob
+    const auto reader = podio::makeReader(files);
+    ASSERT((reader.getEvents() == expected_events), "Reader read invalid number of events");
 #if PODIO_ENABLE_DATASOURCE
-  auto rdf = podio::CreateDataFrame(pattern);
-  ASSERT(rdf.Count().GetValue() == expected_events, "DataSource read invalid number of events");
+    auto rdf = podio::CreateDataFrame(files);
+    ASSERT(rdf.Count().GetValue() == expected_events, "DataSource read invalid number of events");
 #endif // PODIO_ENABLE_DATASOURCE
+  }
+  {
+    // implicit globbing
+    const auto reader = podio::makeReader(pattern);
+    ASSERT((reader.getEvents() == expected_events), "Reader read invalid number of events");
+#if PODIO_ENABLE_DATASOURCE
+    auto rdf = podio::CreateDataFrame(pattern);
+    ASSERT(rdf.Count().GetValue() == expected_events, "DataSource read invalid number of events");
+#endif // PODIO_ENABLE_DATASOURCE
+  }
 }