Below is the file 'tests/ls_duplicates_without_duplicates/__driver__.lua' from this revision. You can also download the file.

mtn_setup()

addfile("testfile", "blah blah")
commit()

writefile("testfile", "foo foo")
commit()

addfile("testfile2", "blah blah")
commit()
R=base_revision()

check(mtn("ls", "duplicates","-r", R), 0, true, false)
check(not qgrep("testfile", "stdout"))