| 1 | #!/bin/sh |
| 2 | TEST_PREFIX="[shift]" |
| 3 | . "$(cd "$(dirname "$0")" && pwd)/test_harness.sh" |
| 4 | |
| 5 | section "1. shift basic" |
| 6 | compare_output "shift removes first param" 'set -- a b c; shift; echo $1' |
| 7 | compare_output "shift updates count" 'set -- a b c; shift; echo $#' |
| 8 | compare_output "shift N removes N params" 'set -- a b c d e; shift 2; echo $1' |
| 9 | compare_output "shift all params" 'set -- a b c; shift 3; echo $#' |
| 10 | compare_output "shift preserves remaining" 'set -- a b c d; shift 2; echo "$@"' |
| 11 | |
| 12 | section "2. shift edge cases" |
| 13 | compare_exit "shift past available params fails" 'set -- a; shift 5 2>/dev/null' |
| 14 | compare_output "shift 0 is no-op" 'set -- a b c; shift 0; echo $1' |
| 15 | compare_output "shift in loop" 'set -- a b c; while [ $# -gt 0 ]; do echo $1; shift; done' |
| 16 | compare_output "shift with no params" 'set --; shift 2>/dev/null; echo $#' |
| 17 | compare_output "multiple shifts" 'set -- a b c d e; shift; shift; echo $1 $#' |
| 18 | |
| 19 | print_summary |