[roottest] Add a test to read an hbook file.

Author: hageboeck

roottest/root/hist/CMakeLists.txt

@@ -11,6 +11,9 @@ if(fortran AND CMAKE_Fortran_COMPILER AND NOT CMAKE_Fortran_COMPILER_ID STREQUAL
                     COMMAND h2root mb4i1.hbook
                     COPY_TO_BUILDDIR mb4i1.hbook
                     OUTREF h2root.ref)
+  ROOT_ADD_GTEST(THbookFile THbookFile.cxx
+    LIBRARIES Hbook
+    COPY_TO_BUILDDIR mb4i1.hbook)
 endif()
 
 ROOTTEST_ADD_TESTDIRS()

roottest/root/hist/THbookFile.cxx

@@ -0,0 +1,16 @@
+#include <THbookFile.h>
+#include <TH1F.h>
+
+#include "gtest/gtest.h"
+
+TEST(THbookFile, ReadTH1)
+{
+   THbookFile file("roottest/root/hist/mb4i1.hbook");
+   EXPECT_STREQ(file.GetCurDir(), "//lun10");
+   EXPECT_EQ(file.GetListOfKeys()->size(), 9);
+
+   TObject *histo = file.Get(1);
+   auto th1 = dynamic_cast<TH1F *>(histo);
+   ASSERT_NE(th1, nullptr);
+   EXPECT_EQ(th1->GetEntries(), 500);
+}