1 | # Simple test harness infrastructure for BusyBox
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2 | #
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3 | # Copyright 2005 by Rob Landley
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4 | #
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5 | # License is GPLv2, see LICENSE in the busybox tarball for full license text.
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6 |
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7 | # This file defines two functions, "testing" and "optional"
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8 | # and a couple more...
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9 |
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10 | # The following environment variables may be set to enable optional behavior
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11 | # in "testing":
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12 | # VERBOSE - Print the diff -u of each failed test case.
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13 | # DEBUG - Enable command tracing.
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14 | # SKIP - do not perform this test (this is set by "optional")
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15 | #
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16 | # The "testing" function takes five arguments:
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17 | # $1) Test description
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18 | # $2) Command(s) to run. May have pipes, redirects, etc
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19 | # $3) Expected result on stdout
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20 | # $4) Data to be written to file "input"
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21 | # $5) Data to be written to stdin
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22 | #
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23 | # The exit value of testing is the exit value of $2 it ran.
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24 | #
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25 | # The environment variable "FAILCOUNT" contains a cumulative total of the
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26 | # number of failed tests.
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27 |
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28 | # The "optional" function is used to skip certain tests, ala:
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29 | # optional FEATURE_THINGY
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30 | #
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31 | # The "optional" function checks the environment variable "OPTIONFLAGS",
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32 | # which is either empty (in which case it always clears SKIP) or
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33 | # else contains a colon-separated list of features (in which case the function
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34 | # clears SKIP if the flag was found, or sets it to 1 if the flag was not found).
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35 |
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36 | export FAILCOUNT=0
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37 | export SKIP=
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38 |
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39 | # Helper for helpers. Oh my...
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40 |
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41 | test x"$ECHO" != x"" || {
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42 | ECHO="echo"
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43 | test x"`echo -ne`" = x"" || {
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44 | # Compile and use a replacement 'echo' which understands -e -n
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45 | ECHO="$PWD/echo-ne"
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46 | test -x "$ECHO" || {
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47 | gcc -Os -o "$ECHO" ../scripts/echo.c || exit 1
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48 | }
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49 | }
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50 | export ECHO
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51 | }
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52 |
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53 | # Helper functions
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54 |
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55 | optional()
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56 | {
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57 | SKIP=
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58 | while test "$1"; do
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59 | if test x"${OPTIONFLAGS/*:$1:*/y}" != x"y"; then
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60 | SKIP=1
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61 | return
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62 | fi
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63 | shift
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64 | done
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65 | }
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66 |
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67 | # The testing function
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68 |
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69 | testing()
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70 | {
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71 | NAME="$1"
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72 | [ -n "$1" ] || NAME="$2"
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73 |
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74 | if [ $# -ne 5 ]
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75 | then
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76 | echo "Test $NAME has wrong number of arguments: $# (must be 5)" >&2
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77 | exit 1
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78 | fi
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79 |
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80 | [ -z "$DEBUG" ] || set -x
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81 |
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82 | if [ -n "$SKIP" ]
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83 | then
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84 | echo "SKIPPED: $NAME"
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85 | return 0
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86 | fi
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87 |
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88 | $ECHO -ne "$3" > expected
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89 | $ECHO -ne "$4" > input
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90 | [ -z "$VERBOSE" ] || echo "echo -ne '$4' >input"
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91 | [ -z "$VERBOSE" ] || echo "echo -ne '$5' | $2"
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92 | $ECHO -ne "$5" | eval "$2" > actual
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93 | RETVAL=$?
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94 |
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95 | if cmp expected actual >/dev/null 2>/dev/null
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96 | then
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97 | echo "PASS: $NAME"
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98 | else
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99 | FAILCOUNT=$(($FAILCOUNT + 1))
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100 | echo "FAIL: $NAME"
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101 | [ -z "$VERBOSE" ] || diff -u expected actual
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102 | fi
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103 | rm -f input expected actual
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104 |
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105 | [ -z "$DEBUG" ] || set +x
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106 |
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107 | return $RETVAL
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108 | }
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109 |
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110 | # Recursively grab an executable and all the libraries needed to run it.
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111 | # Source paths beginning with / will be copied into destpath, otherwise
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112 | # the file is assumed to already be there and only its library dependencies
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113 | # are copied.
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114 |
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115 | mkchroot()
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116 | {
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117 | [ $# -lt 2 ] && return
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118 |
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119 | $ECHO -n .
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120 |
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121 | dest=$1
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122 | shift
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123 | for i in "$@"
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124 | do
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125 | #bashism: [ "${i:0:1}" == "/" ] || i=$(which $i)
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126 | i=$(which $i) # no-op for /bin/prog
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127 | [ -f "$dest/$i" ] && continue
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128 | if [ -e "$i" ]
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129 | then
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130 | d=`echo "$i" | grep -o '.*/'` &&
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131 | mkdir -p "$dest/$d" &&
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132 | cat "$i" > "$dest/$i" &&
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133 | chmod +x "$dest/$i"
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134 | else
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135 | echo "Not found: $i"
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136 | fi
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137 | mkchroot "$dest" $(ldd "$i" | egrep -o '/.* ')
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138 | done
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139 | }
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140 |
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141 | # Set up a chroot environment and run commands within it.
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142 | # Needed commands listed on command line
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143 | # Script fed to stdin.
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144 |
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145 | dochroot()
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146 | {
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147 | mkdir tmpdir4chroot
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148 | mount -t ramfs tmpdir4chroot tmpdir4chroot
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149 | mkdir -p tmpdir4chroot/{etc,sys,proc,tmp,dev}
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150 | cp -L testing.sh tmpdir4chroot
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151 |
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152 | # Copy utilities from command line arguments
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153 |
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154 | $ECHO -n "Setup chroot"
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155 | mkchroot tmpdir4chroot $*
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156 | echo
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157 |
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158 | mknod tmpdir4chroot/dev/tty c 5 0
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159 | mknod tmpdir4chroot/dev/null c 1 3
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160 | mknod tmpdir4chroot/dev/zero c 1 5
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161 |
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162 | # Copy script from stdin
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163 |
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164 | cat > tmpdir4chroot/test.sh
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165 | chmod +x tmpdir4chroot/test.sh
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166 | chroot tmpdir4chroot /test.sh
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167 | umount -l tmpdir4chroot
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168 | rmdir tmpdir4chroot
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169 | }
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