t/ax/tap-functions.sh

   1 # -*- shell-script -*-
   2 #
   3 # Copyright (C) 2011-2017 Free Software Foundation, Inc.
   4 #
   5 # This program is free software; you can redistribute it and/or modify
   6 # it under the terms of the GNU General Public License as published by
   7 # the Free Software Foundation; either version 2, or (at your option)
   8 # any later version.
   9 #
  10 # This program is distributed in the hope that it will be useful,
  11 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 # GNU General Public License for more details.
  14 #
  15 # You should have received a copy of the GNU General Public License
  16 # along with this program.  If not, see <https://www.gnu.org/licenses/>.
  17
  18 # Helper functions used by TAP-producing tests of the Automake testsuite.
  19
  20 #
  21 # IMPORTANT: All the functions defined in this file can *not* be used
  22 #            from within a subshell, unless explicitly noted otherwise.
  23 #
  24
  25 # The counts of the TAP test results seen so far: total count and
  26 # per-result counts.
  27 tap_count_=0
  28 tap_pass_count_=0
  29 tap_skip_count_=0
  30 tap_fail_count_=0
  31 tap_xfail_count_=0
  32 tap_xpass_count_=0
  33
  34 # not COMMAND [ARGS...]
  35 # ---------------------
  36 # Run the given command and invert its exit status.
  37 not () { ! "$@"; }
  38
  39 # plan_ [unknown|later|lazy|now|NUMBER-OF-PLANNED-TESTS]
  40 # ------------------------------------------------------
  41 # Print a TAP plan for the given number of tests.  This must be called
  42 # before reporting any test result.  If called with the special argument
  43 # "unknown" or "later", it will do nothing, expecting the calling script
  44 # to declare the plan later.  If called with the special argument "lazy"
  45 # or "now", it will print a TAP plan that accounts for the number of tests
  46 # seen so far.
  47 plan_ ()
  48 {
  49   if test $# -eq 0; then
  50     bailout_ "plan_: missing argument"
  51   elif test $# -ge 2; then
  52     bailout_ "plan_: too many arguments"
  53   elif test x"$planned_" != x"none" && test x"$planned_" != x"later"; then
  54     bailout_ "plan_: called to many times"
  55   elif test x"$1" = x"unknown" || test x"$1" = x"later"; then
  56     # This means we want to get back later to declaring the TAP plan.
  57     planned_=later
  58     return 0
  59   elif test x"$1" = x"lazy" || test x"$1" = x"now"; then
  60     planned_=$tap_count_ # Number of test results seen so far.
  61   elif test $1 -ge 0; then
  62     planned_=$1
  63   else
  64     bailout_ "plan_: invalid argument '$1'"
  65   fi
  66   echo "1..$planned_"
  67 }
  68 planned_=none
  69
  70 # diag_ [EXPLANATION]
  71 # ------------------
  72 # Report the given text as TAP diagnostic.  Assumes the string denoting
  73 # TAP diagnostic lines is stored in the '$diag_string_' variable; this is
  74 # done to allow better interplay with TAP drivers that allow such a string
  75 # to be configured.
  76 diag_ ()
  77 {
  78   test $# -eq 0 || echo "$diag_string_ $*"
  79 }
  80
  81 # Used by the 'diag_' function above.  User-overridable.
  82 diag_string_="#"
  83
  84 # warn_ [EXPLANATION]
  85 # ------------------
  86 # Give a warning (using TAP diagnostic).
  87 warn_ ()
  88 {
  89   case $# in
  90     0) diag_ "WARNING: (unknown warning)";;
  91     *) diag_ "WARNING: $*";;
  92   esac
  93 }
  94
  95 # result_ RESULT [-D DIRECTIVE] [-r REASON] [--] [DESCRIPTION...]
  96 # ---------------------------------------------------------------
  97 # Report a test case with the given RESULT (valid values are "ok" and
  98 # "not ok") and the given DESCRIPTION (if any).  If DIRECTIVE is given
  99 # and non-empty (valid values being "TODO" and "SKIP"), it will be
 100 # reported too, with the REASON (if given) appended.
 101 result_ ()
 102 {
 103   set +x # Don't pollute the log files.
 104   test $# -gt 0 || bailout_ "result_: missing argument"
 105   tap_result_=$1; shift
 106   case $tap_result_ in
 107     "ok"|"not ok") ;;
 108     *) bailout_ "result_: invalid result '$tap_result'" ;;
 109   esac
 110   tap_directive_= tap_reason_=
 111   while test $# -gt 0; do
 112     case $1 in
 113       -D|--directive) tap_directive_=$2; shift;;
 114       -r|--reason) tap_reason_=$2; shift;;
 115       --) shift; break;;
 116       -*) bailout_ "result_: invalid option '$1'";;
 117        *) break;;
 118     esac
 119     shift
 120   done
 121   case $tap_directive_ in
 122     ""|TODO|SKIP) ;;
 123     *) bailout_ "result_: invalid directive '$directive_'" ;;
 124   esac
 125   tap_count_=$(($tap_count_ + 1))
 126   case $tap_result_,$tap_directive_ in
 127     ok,)                                                # Passed.
 128       tap_pass_count_=$(($tap_pass_count_ + 1))         ;;
 129     not\ ok,TODO)                                       # Expected failure.
 130       tap_xfail_count_=$(($tap_xfail_count_ + 1))       ;;
 131     not\ ok,*)                                          # Failed.
 132       tap_fail_count_=$(($tap_fail_count_ + 1))         ;;
 133     ok,TODO)                                            # Unexpected pass.
 134       tap_xpass_count_=$(($tap_xpass_count_ + 1))       ;;
 135     ok,SKIP)                                            # Skipped.
 136       tap_skip_count_=$(($tap_skip_count_ + 1))         ;;
 137     *)                                                  # Can't happen.
 138       bailout_ "internal error in 'result_'"            ;;
 139   esac
 140   tap_text_="$tap_result_ $tap_count_"
 141   if test x"$*" != x; then
 142     tap_text_="$tap_text_ - $*"
 143   fi
 144   if test x"$tap_directive_" != x; then
 145     tap_text_="$tap_text_ # $tap_directive_"${tap_reason_:+" $tap_reason_"}
 146   fi
 147   printf '%s\n' "$tap_text_"
 148   set -x # Restore shell xtraces.
 149 }
 150
 151 #  Shorthands for common usages of 'result_'.
 152 ok_ () { result_ 'ok' ${1+"$@"}; }
 153 not_ok_ () { result_ 'not ok' ${1+"$@"}; }
 154 skip_ () { result_ 'ok' -D SKIP ${1+"$@"}; }
 155
 156 # skip_row_ COUNT [-r REASON] [--] [DESCRIPTION...]
 157 # -------------------------------------------------
 158 # Report a COUNT of skipped test, with the given reason and descriptions
 159 # (if any).  Useful to avoid cascade failures in case a fair number of
 160 # tests depend on an earlier one that failed.
 161 skip_row_ ()
 162 {
 163   skip_count_=$1; shift
 164   for i_ in $(seq_ $skip_count_); do skip_ ${1+"$@"}; done
 165 }
 166
 167 # skip_all_ [REASON ...]
 168 # ----------------------
 169 # Skip all the tests in a test script.  Must be used before calling 'plan_'
 170 # or reporting any test result.  Can't be used from within a subshell.
 171 skip_all_ ()
 172 {
 173   echo "1..0 # SKIP" ${1+"$@"}
 174   planned_=0
 175   exit 0
 176 }
 177
 178 # bailout_ [REASON ...]
 179 # ---------------------
 180 # Stop the execution of the current test suite right now, due to an
 181 # unrecoverable error.  Can be called at any point, but cannot be used
 182 # from within a subshell.
 183 bailout_ ()
 184 {
 185   echo 'Bail out!' ${1+"$@"}
 186   exit 99
 187 }
 188
 189 # fatal_ [REASON ...]
 190 # -------------------
 191 # Same as 'bailout_'; for compatibility with 'plain-functions.sh'.
 192 fatal_ ()
 193 {
 194   bailout_ ${1+"$@"}
 195 }
 196
 197 # framework_failure_ [REASON ...]
 198 # -------------------------------
 199 # Stop the execution of the current test suite right now, due to an
 200 # unrecoverable error in the set-up of the test case.  Can be called
 201 # at any point, but cannot be used from within a subshell.
 202 framework_failure_ ()
 203 {
 204   bailout_ "set-up failure"${1+": $*"}
 205 }
 206
 207 # command_ok_ TEST-DESCRIPTION [OPTIONS..] [--] CMD [ARGS...]
 208 # -----------------------------------------------------------
 209 # Helper subroutine for when a TAP result must be determined by the
 210 # outcome of a command.
 211 command_ok_ ()
 212 {
 213   tap_directive_= tap_reason_=
 214   test $# -gt 0 || bailout_ "command_ok_: missing argument"
 215   tap_description_=$1; shift
 216   while test $# -gt 0; do
 217     case $1 in
 218       -D|--directive) tap_directive_=$2; shift;;
 219       -r|--reason) tap_reason_=$2; shift;;
 220       --) shift; break;;
 221       -*) bailout_ "command_ok_: invalid option '$1'";;
 222        *) break;;
 223     esac
 224     shift
 225   done
 226   tap_result_="ok"; "$@" || tap_result_="not ok"
 227   result_ "$tap_result_" -D "$tap_directive_" -r "$tap_reason_" \
 228           -- "$tap_description_"
 229 }
 230
 231 :