Minimal bash unit testing framework

test.sh

#!/bin/bash
#
# Copyright (c) 2013 Maximilian Antoni
#
export TEST_COLOR_GREEN="\033[1m\033[32m"
export TEST_COLOR_RED="\033[1m\033[31m"
export TEST_COLOR_TITLE="\033[1m\033[36m"
export TEST_COLOR_OFF="\033[0m"
export TEST_SPACES="                                        "
export TEST_LINE="-----------------------------------------------------"
 
pass() {
  echo -n "  $1${TEST_SPACES:${#1}}"
  echo -e "\t[$TEST_COLOR_GREEN  OK  $TEST_COLOR_OFF]"
}
 
fail() {
  echo -n "  $1${TEST_SPACES:${#1}}"
  echo -e "\t[$TEST_COLOR_RED""FAILED$TEST_COLOR_OFF]"
  echo -e "$TEST_COLOR_RED  $2$TEST_COLOR_OFF"
}
 
assertEqual() {
  TEST_EVALUATED=`(eval $2) 2>&1`
  if [[ "$TEST_EVALUATED" == "$3" ]]; then
    pass "$1"
  else
    fail "$1" "Expected $3\n  Actual   $TEST_EVALUATED"
  fi
}
 
assert() {
  (eval "if $2; then pass \"$1\"; else fail \"$1\" \"$2\"; fi")
}
 
assertNot() {
  (eval "if $2; then fail \"$1\" \"$2\"; else pass \"$1\"; fi")
}
 
reset() {
  . tear-down.sh
  . setup.sh
}
 
export -f pass
export -f fail
export -f assertEqual
export -f assert
export -f assertNot
export -f reset
 
# Run test scripts:
cd test
if [ $1 ]; then
  TEST_TESTS=($1)
else
  TEST_TESTS=`ls test-*.sh`
fi
for TEST_TEST in $TEST_TESTS; do
  echo -e $TEST_COLOR_TITLE"# "$TEST_TEST" "${TEST_LINE:${#TEST_TEST}}$TEST_COLOR_OFF
  . setup.sh
  ./$TEST_TEST
  . tear-down.sh
  echo
done

testing.sh

# Declare variables so that they can be overridden like this
: ${SOME_VARIABLE:="the/default/value"}
 
# In the test code, for example in setup.sh, override the variable
export SOME_VARIABLE="the/test/override"