| 1 | #!/usr/bin/env bash
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| 2 | #
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| 3 | # Testing library for bash and OSH.
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| 4 | #
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| 5 | # Capture status/stdout/stderr, and nq-assert those values.
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| 6 |
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| 7 | : ${LIB_OSH=stdlib/osh}
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| 8 | source $LIB_OSH/two.sh
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| 9 |
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| 10 | nq-assert() {
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| 11 | ### Assertion with same syntax as shell 'test'
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| 12 |
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| 13 | if ! test "$@"; then
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| 14 | die "line ${BASH_LINENO[0]}: nq-assert $(printf '%q ' "$@") failed"
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| 15 | fi
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| 16 | }
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| 17 |
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| 18 | # Problem: we want to capture status and stdout at the same time
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| 19 | #
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| 20 | # We use:
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| 21 | #
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| 22 | # __stdout=$(set -o errexit; "$@")
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| 23 | # __status=$?
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| 24 | #
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| 25 | # However, we lose the trailing \n, since that's how command subs work.
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| 26 |
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| 27 | # Here is another possibility:
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| 28 | #
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| 29 | # shopt -s lastpipe # need this too
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| 30 | # ( set -o errexit; "$@" ) | read -r -d __stdout
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| 31 | # __status=${PIPESTATUS[0]}
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| 32 | # shopt -u lastpipe
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| 33 | #
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| 34 | # But this feels complex for just the \n issue, which can be easily worked
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| 35 | # around.
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| 36 |
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| 37 | nq-capture() {
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| 38 | ### capture status and stdout
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| 39 |
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| 40 | local -n out_status=$1
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| 41 | local -n out_stdout=$2
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| 42 | shift 2
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| 43 |
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| 44 | local __status
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| 45 | local __stdout
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| 46 |
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| 47 | # Tricky: turn errexit off so we can capture it, but turn it on against
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| 48 | set +o errexit
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| 49 | __stdout=$(set -o errexit; "$@")
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| 50 | __status=$?
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| 51 | set -o errexit
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| 52 |
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| 53 | out_status=$__status
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| 54 | out_stdout=$__stdout
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| 55 | }
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| 56 |
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| 57 | nq-capture-2() {
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| 58 | ### capture status and stderr
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| 59 |
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| 60 | # This is almost identical to the above
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| 61 |
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| 62 | local -n out_status=$1
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| 63 | local -n out_stderr=$2
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| 64 | shift 2
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| 65 |
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| 66 | local __status
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| 67 | local __stderr
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| 68 |
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| 69 | # Tricky: turn errexit off so we can capture it, but turn it on against
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| 70 | set +o errexit
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| 71 | __stderr=$(set -o errexit; "$@" 2>&1)
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| 72 | __status=$?
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| 73 | set -o errexit
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| 74 |
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| 75 | out_status=$__status
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| 76 | out_stderr=$__stderr
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| 77 | }
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| 78 |
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| 79 | _demo-stderr() {
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| 80 | echo zzz "$@" >& 2
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| 81 | return 99
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| 82 | }
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| 83 |
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| 84 | test-nq-capture() {
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| 85 | local status stdout
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| 86 | nq-capture status stdout \
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| 87 | echo -n hi
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| 88 | nq-assert 0 = "$status"
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| 89 | nq-assert 'hi' = "$stdout"
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| 90 |
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| 91 | nq-capture status stdout \
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| 92 | echo hi
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| 93 | nq-assert 0 = "$status"
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| 94 | # Note that we LOSE the last newline!
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| 95 | #nq-assert $'hi\n' = "$stdout"
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| 96 |
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| 97 | local stderr
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| 98 | nq-capture-2 status stderr \
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| 99 | _demo-stderr yyy
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| 100 |
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| 101 | #echo "stderr: [$stderr]"
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| 102 |
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| 103 | nq-assert 99 = "$status"
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| 104 | nq-assert 'zzz yyy' = "$stderr"
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| 105 |
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| 106 | nq-capture status stdout \
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| 107 | _demo-stderr aaa
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| 108 |
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| 109 | #echo "stderr: [$stderr]"
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| 110 |
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| 111 | nq-assert 99 = "$status"
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| 112 | nq-assert '' = "$stdout"
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| 113 | }
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| 114 |
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| 115 | name=$(basename $0)
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| 116 | if test "$name" = 'no-quotes.sh'; then
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| 117 | "$@"
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| 118 | fi
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