[io] add integration test for TFile recover

Author: silverweed

roottest/root/io/recover/CMakeLists.txt

@@ -6,3 +6,13 @@ ROOTTEST_ADD_TEST(zombie
 ROOTTEST_ADD_TEST(empty
                   MACRO runempty.C
                   OUTREF empty.ref)
+
+# corrupted_recover.root contains an otherwise-valid ROOT file that has been tweaked in the following way:
+# - fEND is changed to a larger size than the file, to trigger the recover;
+# - a fake key has been appended, that has a className "TH1F" and an object name whose string length is 2 GiB long.
+# The test verifies that Recover doesn't try to read out of bounds and refuses to read the string, while still
+# properly recovering the first two valid keys.
+ROOTTEST_ADD_TEST(corrupted_objname
+                  COPY_TO_BUILDDIR corrupted_recover.root
+                  COMMAND ${ROOT_root_CMD} -q corrupted_recover.root
+                  PASSREGEX "given buffer is too small \\(992 B remaining, need at least 2147483646 more\\)")