void do_tests() { string foo = read_bytes("/testfile"); string mid = implode(explode(foo, "\n")[99..198], "\n") + "\n"; ASSERT(!read_file("/single", 10, 10)); ASSERT(read_file("/testfile") == foo); ASSERT(read_file("/testfile", 100, 100) == mid); ASSERT(!read_file("/does_not_exist")); ASSERT(!read_file("/testfile", 10000, 1)); }