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bats/libexec/bats-exec-suite
Sam Stephenson bfa4ebcd0f Prefer let x+=1 for incrementing counters
The `((x++))` syntax is shorthand for `let x++`. According to `help let`:

    If the last ARG evaluates to 0, let returns 1; 0 is returned
    otherwise.

Thus the exit status of the expression `x=0; let x++` is 1, since the post-increment `++` operator evaluates to the value of the variable before incrementing.

In Bash 4, this non-zero exit status properly triggers `set -e`'s error trap, but in Bash 3 it does not. That's why the tests were passing on OS X (Bash 3) but not Linux (Bash 4).

We can work around the problem by choosing an incrementation expression that never evaluates to 0, such as `+=` or the pre-increment `++` operator. For consistency and clarity, I've changed to `x+=1` everywhere.

Ref. #25, #27
2013-10-28 21:01:51 -05:00

56 lines
1001 B
Bash
Executable File

#!/usr/bin/env bash
set -e
count_only_flag=""
if [ "$1" = "-c" ]; then
count_only_flag=1
shift
fi
extended_syntax_flag=""
if [ "$1" = "-x" ]; then
extended_syntax_flag="-x"
shift
fi
trap "kill 0; exit 1" int
count=0
for filename in "$@"; do
let count+="$(bats-exec-test -c "$filename")"
done
if [ -n "$count_only_flag" ]; then
echo "$count"
exit
fi
echo "1..$count"
status=0
offset=0
for filename in "$@"; do
index=0
{
IFS= read -r # 1..n
while IFS= read -r line; do
case "$line" in
"begin "* )
let index+=1
echo "${line/ $index / $(($offset + $index)) }"
;;
"ok "* | "not ok "* )
[ -n "$extended_syntax_flag" ] || let index+=1
echo "${line/ $index / $(($offset + $index)) }"
[ "${line:0:6}" != "not ok" ] || status=1
;;
* )
echo "$line"
;;
esac
done
} < <( bats-exec-test $extended_syntax_flag "$filename" )
offset=$(($offset + $index))
done
exit "$status"