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|
#!/bin/sh
set -eu
ROOT=$(CDPATH= cd -- "$(dirname -- "$0")/.." && pwd)
EXPR_BIN=${EXPR_BIN:-"$ROOT/out/expr"}
TMPDIR=${TMPDIR:-/tmp}
WORKDIR=$(mktemp -d "$TMPDIR/expr-test.XXXXXX")
trap 'rm -rf "$WORKDIR"' EXIT INT TERM
LC_ALL=C
LANG=C
export LC_ALL LANG
fail() {
printf '%s\n' "FAIL: $1" >&2
exit 1
}
assert_status() {
name=$1
expected=$2
actual=$3
[ "$expected" -eq "$actual" ] || fail "$name: expected exit $expected got $actual"
}
assert_file_match() {
name=$1
pattern=$2
actual_file=$3
if ! grep -Eq "$pattern" "$actual_file"; then
printf '%s\n' "FAIL: $name" >&2
printf '%s\n' "--- actual ---" >&2
cat "$actual_file" >&2
exit 1
fi
}
assert_file_eq() {
name=$1
expected_text=$2
actual_file=$3
expected_file=$WORKDIR/expected.$$
printf '%s' "$expected_text" > "$expected_file"
if ! cmp -s "$expected_file" "$actual_file"; then
printf '%s\n' "FAIL: $name" >&2
printf '%s\n' "--- expected ---" >&2
od -An -tx1 -v "$expected_file" >&2
printf '%s\n' "--- actual ---" >&2
od -An -tx1 -v "$actual_file" >&2
exit 1
fi
}
run_case() {
name=$1
expected_status=$2
expected_stdout=$3
expected_stderr=$4
shift 4
stdout_file=$WORKDIR/stdout
stderr_file=$WORKDIR/stderr
if "$EXPR_BIN" "$@" >"$stdout_file" 2>"$stderr_file"; then
status=0
else
status=$?
fi
assert_status "$name status" "$expected_status" "$status"
assert_file_eq "$name stdout" "$expected_stdout" "$stdout_file"
assert_file_eq "$name stderr" "$expected_stderr" "$stderr_file"
}
run_case_match_stderr() {
name=$1
expected_status=$2
expected_stdout=$3
stderr_pattern=$4
shift 4
stdout_file=$WORKDIR/stdout
stderr_file=$WORKDIR/stderr
if "$EXPR_BIN" "$@" >"$stdout_file" 2>"$stderr_file"; then
status=0
else
status=$?
fi
assert_status "$name status" "$expected_status" "$status"
assert_file_eq "$name stdout" "$expected_stdout" "$stdout_file"
assert_file_match "$name stderr" "$stderr_pattern" "$stderr_file"
}
derive_intmax_bounds() {
power=1
steps=0
while next=$("$EXPR_BIN" "$power" "*" "2" 2>/dev/null); do
power=$next
steps=$((steps + 1))
[ "$steps" -le 256 ] || fail "could not derive intmax bounds"
done
INTMAX_MAX_VALUE=$("$EXPR_BIN" "(" "$power" "-" "1" ")" "+" "$power")
INTMAX_MIN_VALUE=$("$EXPR_BIN" "0" "-" "1" "-" "$INTMAX_MAX_VALUE")
export INTMAX_MAX_VALUE INTMAX_MIN_VALUE
}
[ -x "$EXPR_BIN" ] || fail "missing binary: $EXPR_BIN"
derive_intmax_bounds
run_case "no arguments" 2 "" "usage: expr [-e] [--] expression
"
run_case "invalid option" 2 "" "usage: expr [-e] [--] expression
" "-x"
run_case "integer addition" 0 "7
" "" "3" "+" "4"
run_case "zero exit status" 1 "0
" "" "3" "-" "3"
run_case "parentheses precedence" 0 "21
" "" "(" "3" "+" "4" ")" "*" "3"
run_case "left associative subtraction" 0 "3
" "" "8" "-" "3" "-" "2"
run_case "left associative division" 0 "2
" "" "12" "/" "3" "/" "2"
run_case "division by zero" 2 "" "expr: division by zero
" "7" "/" "0"
run_case "remainder by zero" 2 "" "expr: division by zero
" "7" "%" "0"
run_case "type mismatch" 2 "" "expr: not a decimal number: 'abc'
" "abc" "+" "1"
run_case "too large operand" 2 "" "expr: operand too large: '999999999999999999999999999999999999'
" "999999999999999999999999999999999999" "+" "1"
run_case "addition overflow" 2 "" "expr: overflow
" "$INTMAX_MAX_VALUE" "+" "1"
run_case "subtraction overflow" 2 "" "expr: overflow
" "--" "$INTMAX_MIN_VALUE" "-" "1"
run_case "multiplication overflow" 2 "" "expr: overflow
" "$INTMAX_MAX_VALUE" "*" "2"
run_case "division overflow" 2 "" "expr: overflow
" "--" "$INTMAX_MIN_VALUE" "/" "-1"
run_case "string comparison" 0 "1
" "" "b" ">" "a"
run_case "numeric string comparison" 0 "1
" "" "--" "09" "=" "9"
run_case "strict plus stays string" 1 "0
" "" "--" "+7" "=" "7"
run_case "logical or keeps left value" 0 "left
" "" "left" "|" "right"
run_case "logical or returns right" 0 "fallback
" "" "0" "|" "fallback"
run_case "logical and keeps left value" 0 "left
" "" "left" "&" "right"
run_case "logical and returns zero" 1 "0
" "" "" "&" "right"
run_case "regex length" 0 "6
" "" "abcdef" ":" "abc.*"
run_case "regex capture" 0 "de
" "" "abcde" ":" "abc\\(..\\)"
run_case "regex anchor" 1 "0
" "" "abcde" ":" "bc"
run_case "regex capture miss" 1 "
" "" "abcde" ":" "zzz\\(..\\)"
run_case_match_stderr "regex syntax error" 2 "" '^expr: regular expression error: ' "abc" ":" "[["
run_case "strict negative needs --" 2 "" "usage: expr [-e] [--] expression
" "-1" "+" "2"
run_case "negative with --" 0 "1
" "" "--" "-1" "+" "2"
run_case "compat still needs -- for leading negative operand" 2 "" "usage: expr [-e] [--] expression
" "-e" "-1" "+" "2"
run_case "compat leading plus" 0 "1
" "" "-e" " +7" "=" "7"
run_case "compat empty string as zero" 0 "1
" "" "-e" "" "+" "1"
run_case "compat empty string compares as zero" 0 "1
" "" "-e" "" "=" "0"
run_case "syntax error" 2 "" "expr: syntax error
" "1" "+"
run_case "trailing token syntax error" 2 "" "expr: syntax error
" "1" "2"
run_case "missing closing parenthesis" 2 "" "expr: syntax error
" "(" "1" "+" "2"
stdout_file=$WORKDIR/write-fail.stdout
stderr_file=$WORKDIR/write-fail.stderr
if (
exec 1>&-
"$EXPR_BIN" "write-test"
) >"$stdout_file" 2>"$stderr_file"; then
status=0
else
status=$?
fi
assert_status "write failure status" 2 "$status"
assert_file_eq "write failure stdout" "" "$stdout_file"
case $(cat "$stderr_file") in
"expr: write failed: "* ) ;;
* ) fail "write failure stderr" ;;
esac
printf '%s\n' "PASS"
|
