diff --git a/.gitignore b/.gitignore
index 0c59f96..5ffd235 100644
--- a/.gitignore
+++ b/.gitignore
@@ -8,3 +8,4 @@ CMakeFiles
 install_manifest.txt
 jshn
 *-example
+tests.*
diff --git a/examples/json_script-example.c b/examples/json_script-example.c
index e3305de..4d252a9 100644
--- a/examples/json_script-example.c
+++ b/examples/json_script-example.c
@@ -16,10 +16,10 @@ static void handle_command(struct json_script_ctx *ctx, const char *name,
 	struct blob_attr *cur;
 	int rem;
 
-	fprintf(stderr, "Command: %s", name);
+	fprintf(stdout, "%s", name);
 	blobmsg_for_each_attr(cur, data, rem)
-		fprintf(stderr, " %s", (char *) blobmsg_data(cur));
-	fprintf(stderr, "\n");
+		fprintf(stdout, " %s", (char *) blobmsg_data(cur));
+	fprintf(stdout, "\n");
 }
 
 static struct json_script_file *
diff --git a/examples/json_script-tests.sh b/examples/json_script-tests.sh
new file mode 100644
index 0000000..cf4638b
--- /dev/null
+++ b/examples/json_script-tests.sh
@@ -0,0 +1,287 @@
+JSON_SCRIPT=tests.json
+JSON_SCRIPT_BIN=./json_script-example
+FILE_STDOUT=tests.stderr
+FILE_STDERR=tests.stderr
+FILE_EXPECTED=tests.expected
+
+call_json_script() {
+	#export LD_PRELOAD=../libjson_script.so
+	$JSON_SCRIPT_BIN "$@" "$JSON_SCRIPT" >"$FILE_STDOUT" 2>"$FILE_STDERR"
+}
+
+assertStdioEquals() {
+	local expected="$1"
+	local file_stdio="$2"
+
+	echo "$expected" >"$FILE_EXPECTED"
+	if [ -z "$expected" ]; then
+		# we are expecting empty output, but we deliberately added a newline
+		# with echo above, so adding another echo to compensate for that
+		echo >>"$file_stdio"
+	fi
+	diff -up "$FILE_EXPECTED" "$file_stdio" >/dev/null 2>&1 || {
+		cat >&2 <<EOF
+|--- expecting
+$expected<
+|--- actual
+$(cat $file_stdio)<
+|--- END
+EOF
+		exit 1
+	}
+}
+
+assertStdoutEquals() {
+	assertStdioEquals "$1" "$FILE_STDOUT"
+}
+
+assertStderrEquals() {
+	assertStdioEquals "$1" "$FILE_STDERR"
+}
+
+test_bad_json() {
+	cat >"$JSON_SCRIPT" <<-EOF
+	[
+		[ ]
+		[ ]
+	]
+	EOF
+	call_json_script
+	assertStderrEquals "load JSON data from $JSON_SCRIPT failed."
+}
+
+test_expr_eq() {
+	cat >"$JSON_SCRIPT" <<-EOF
+	[
+		[ "if",
+			[ "eq", "VAR", "foo" ],
+			[ "echo", "bar" ],
+			[ "echo", "baz" ]
+		]
+	]
+	EOF
+	call_json_script "VAR=foo"
+	assertStdoutEquals "echo bar"
+	call_json_script "VAR=xxx"
+	assertStdoutEquals "echo baz"
+}
+
+test_expr_has() {
+	cat >"$JSON_SCRIPT" <<-EOF
+	[
+		[ "if",
+			[ "has", "VAR" ],
+			[ "echo", "bar" ],
+			[ "echo", "baz" ]
+		]
+	]
+	EOF
+	call_json_script "VAR=foo"
+	assertStdoutEquals "echo bar"
+	call_json_script
+	assertStdoutEquals "echo baz"
+}
+
+test_expr_regex_single() {
+	cat >"$JSON_SCRIPT" <<-EOF
+	[
+		[ "if",
+			[ "regex", "VAR", ".ell." ],
+			[ "echo", "bar" ],
+			[ "echo", "baz" ]
+		]
+	]
+	EOF
+	call_json_script "VAR=hello"
+	assertStdoutEquals "echo bar"
+	call_json_script "VAR=.ell."
+	assertStdoutEquals "echo bar"
+	call_json_script
+	assertStdoutEquals "echo baz"
+	call_json_script "VAR="
+	assertStdoutEquals "echo baz"
+	call_json_script "VAR=hell"
+	assertStdoutEquals "echo baz"
+}
+
+test_expr_regex_multi() {
+	cat >"$JSON_SCRIPT" <<-EOF
+	[
+		[ "if",
+			[ "regex", "VAR", [ ".ell.", "w.rld" ] ],
+			[ "echo", "bar" ],
+			[ "echo", "baz" ]
+		]
+	]
+	EOF
+	call_json_script "VAR=hello"
+	assertStdoutEquals "echo bar"
+	call_json_script "VAR=world"
+	assertStdoutEquals "echo bar"
+	call_json_script "VAR=.ell."
+	assertStdoutEquals "echo bar"
+	call_json_script "VAR=w.rld"
+	assertStdoutEquals "echo bar"
+	call_json_script
+	assertStdoutEquals "echo baz"
+	call_json_script "VAR="
+	assertStdoutEquals "echo baz"
+	call_json_script "VAR=hell"
+	assertStdoutEquals "echo baz"
+}
+
+test_expr_not() {
+	cat >"$JSON_SCRIPT" <<-EOF
+	[
+		[ "if",
+			[ "not", [ "has", "VAR" ] ],
+			[ "echo", "bar" ],
+			[ "echo", "baz" ]
+		]
+	]
+	EOF
+	call_json_script "VAR=foo"
+	assertStdoutEquals "echo baz"
+	call_json_script
+	assertStdoutEquals "echo bar"
+}
+
+test_expr_and() {
+	cat >"$JSON_SCRIPT" <<-EOF
+	[
+		[ "if",
+			[ "and", [ "eq", "EQVAR", "eqval" ],
+					 [ "regex", "REGEXVAR", "regex..." ]
+			],
+			[ "echo", "bar" ],
+			[ "echo", "baz" ]
+		]
+	]
+	EOF
+	call_json_script "EQVAR=eqval" "REGEXVAR=regexval"
+	assertStdoutEquals "echo bar"
+	call_json_script "EQVAR=foo"
+	assertStdoutEquals "echo baz"
+	call_json_script "REGEXVAR=regex***"
+	assertStdoutEquals "echo baz"
+	call_json_script
+	assertStdoutEquals "echo baz"
+}
+
+test_expr_or() {
+	cat >"$JSON_SCRIPT" <<-EOF
+	[
+		[ "if",
+			[ "or", [ "not", [ "eq", "EQVAR", "eqval" ] ],
+					[ "regex", "REGEXVAR", [ "regexva.[0-9]", "regexva.[a-z]" ] ]
+			],
+			[ "echo", "bar" ],
+			[ "echo", "baz" ]
+		]
+	]
+	EOF
+	call_json_script "EQVAR=eqval" "REGEXVAR=regexval1"
+	assertStdoutEquals "echo bar"
+	call_json_script "EQVAR=neq" "REGEXVAR=sxc"
+	assertStdoutEquals "echo bar"
+	call_json_script "REGEXVAR=sxc"
+	assertStdoutEquals "echo bar"
+	call_json_script "EQVAR=foo"
+	assertStdoutEquals "echo bar"
+	call_json_script
+	assertStdoutEquals "echo bar"
+	call_json_script "EQVAR=eqval" "REGEXVAR=regexval"
+	assertStdoutEquals "echo baz"
+}
+
+test_expr_isdir() {
+	cat >"$JSON_SCRIPT" <<-EOF
+	[
+		[ "if",
+			[ "isdir", "%VAR%" ],
+			[ "echo", "bar" ],
+			[ "echo", "baz" ]
+		]
+	]
+	EOF
+	call_json_script "VAR=/"
+	assertStdoutEquals "echo bar"
+	call_json_script "VAR=$(mktemp -u)"
+	assertStdoutEquals "echo baz"
+	call_json_script
+	assertStdoutEquals "echo baz"
+}
+
+test_cmd_case() {
+	cat >"$JSON_SCRIPT" <<-EOF
+	[
+		[ "case", "CASEVAR", {
+			"0": [ "echo", "foo" ],
+			"1": [
+				[ "echo", "bar" ],
+				[ "echo", "baz" ]
+			],
+			"%VAR%": [ "echo", "quz" ]
+		} ]
+	]
+	EOF
+	call_json_script "CASEVAR=0"
+	assertStdoutEquals "echo foo"
+	call_json_script "CASEVAR=1"
+	assertStdoutEquals "echo bar
+echo baz"
+	call_json_script "CASEVAR=%VAR%"
+	assertStdoutEquals "echo quz"
+	call_json_script "CASEVAR="
+	assertStdoutEquals ""
+	call_json_script
+	assertStdoutEquals ""
+	call_json_script "CASEVAR=xxx" "VAR=xxx"
+	assertStdoutEquals ""
+}
+
+test_cmd_if() {
+	cat >"$JSON_SCRIPT" <<-EOF
+	[
+		[ "if",
+			[ "eq", "VAR", "foo" ],
+			[ "echo", "bar" ],
+			[ "echo", "baz" ]
+		]
+	]
+	EOF
+	call_json_script "VAR=foo"
+	assertStdoutEquals "echo bar"
+	call_json_script "VAR=xxx"
+	assertStdoutEquals "echo baz"
+}
+
+test_cmd_cb() {
+	cat >"$JSON_SCRIPT" <<-EOF
+	[
+		[ "exec", "%VAR%", "/%VAS%%%/" ]
+	]
+	EOF
+	call_json_script
+	assertStdoutEquals "exec  /%/"
+	call_json_script "VAR="
+	assertStdoutEquals "exec  /%/"
+	call_json_script "VAR=qux" "VAS=3"
+	assertStdoutEquals "exec qux /3%/"
+}
+
+test_cmd_return() {
+	cat >"$JSON_SCRIPT" <<-EOF
+	[
+		[ "heh", "%HEHVAR%" ],
+		[ "%VAR%", "%VAR%" ],
+		[ "return" ],
+		[ "exec_non_reachable", "Arghhh" ]
+	]
+	EOF
+	call_json_script "HEHVAR=dude" "VAR=ow"
+	assertStdoutEquals "heh dude
+%VAR% ow"
+}
+
+. ./shunit2
diff --git a/examples/shunit2 b/examples/shunit2
new file mode 100644
index 0000000..d6e7503
--- /dev/null
+++ b/examples/shunit2
@@ -0,0 +1,1067 @@
+#! /bin/sh
+# $Id$
+# vim:et:ft=sh:sts=2:sw=2
+#
+# Copyright 2008 Kate Ward. All Rights Reserved.
+# Released under the LGPL (GNU Lesser General Public License)
+#
+# shUnit2 -- Unit testing framework for Unix shell scripts.
+# http://code.google.com/p/shunit2/
+#
+# Author: kate.ward@forestent.com (Kate Ward)
+#
+# shUnit2 is a xUnit based unit test framework for Bourne shell scripts. It is
+# based on the popular JUnit unit testing framework for Java.
+
+# return if shunit already loaded
+[ -n "${SHUNIT_VERSION:-}" ] && exit 0
+SHUNIT_VERSION='2.1.7pre'
+
+# return values that scripts can use
+SHUNIT_TRUE=0
+SHUNIT_FALSE=1
+SHUNIT_ERROR=2
+
+# logging functions
+_shunit_warn() { echo "shunit2:WARN $@" >&2; }
+_shunit_error() { echo "shunit2:ERROR $@" >&2; }
+_shunit_fatal() { echo "shunit2:FATAL $@" >&2; exit ${SHUNIT_ERROR}; }
+
+# determine some reasonable command defaults
+__SHUNIT_UNAME_S=`uname -s`
+case "${__SHUNIT_UNAME_S}" in
+  BSD) __SHUNIT_EXPR_CMD='gexpr' ;;
+  *) __SHUNIT_EXPR_CMD='expr' ;;
+esac
+
+# commands a user can override if needed
+SHUNIT_EXPR_CMD=${SHUNIT_EXPR_CMD:-${__SHUNIT_EXPR_CMD}}
+
+# enable strict mode by default
+SHUNIT_STRICT=${SHUNIT_STRICT:-${SHUNIT_TRUE}}
+
+# specific shell checks
+if [ -n "${ZSH_VERSION:-}" ]; then
+  setopt |grep "^shwordsplit$" >/dev/null
+  if [ $? -ne ${SHUNIT_TRUE} ]; then
+    _shunit_fatal 'zsh shwordsplit option is required for proper operation'
+  fi
+  if [ -z "${SHUNIT_PARENT:-}" ]; then
+    _shunit_fatal "zsh does not pass \$0 through properly. please declare \
+\"SHUNIT_PARENT=\$0\" before calling shUnit2"
+  fi
+fi
+
+#
+# constants
+#
+
+__SHUNIT_ASSERT_MSG_PREFIX='ASSERT:'
+__SHUNIT_MODE_SOURCED='sourced'
+__SHUNIT_MODE_STANDALONE='standalone'
+__SHUNIT_PARENT=${SHUNIT_PARENT:-$0}
+
+# set the constants readonly
+__shunit_constants=`set |grep '^__SHUNIT_' |cut -d= -f1`
+echo "${__shunit_constants}" |grep '^Binary file' >/dev/null && \
+    __shunit_constants=`set |grep -a '^__SHUNIT_' |cut -d= -f1`
+for __shunit_const in ${__shunit_constants}; do
+  if [ -z "${ZSH_VERSION:-}" ]; then
+    readonly ${__shunit_const}
+  else
+    case ${ZSH_VERSION} in
+      [123].*) readonly ${__shunit_const} ;;
+      *) readonly -g ${__shunit_const}  # declare readonly constants globally
+    esac
+  fi
+done
+unset __shunit_const __shunit_constants
+
+#
+# internal variables
+#
+
+# variables
+__shunit_lineno=''  # line number of executed test
+__shunit_mode=${__SHUNIT_MODE_SOURCED}  # operating mode
+__shunit_reportGenerated=${SHUNIT_FALSE}  # is report generated
+__shunit_script=''  # filename of unittest script (standalone mode)
+__shunit_skip=${SHUNIT_FALSE}  # is skipping enabled
+__shunit_suite=''  # suite of tests to execute
+
+# counts of tests
+__shunit_testSuccess=${SHUNIT_TRUE}
+__shunit_testsTotal=0
+__shunit_testsPassed=0
+__shunit_testsFailed=0
+
+# counts of asserts
+__shunit_assertsTotal=0
+__shunit_assertsPassed=0
+__shunit_assertsFailed=0
+__shunit_assertsSkipped=0
+
+# macros
+_SHUNIT_LINENO_='eval __shunit_lineno=""; if [ "${1:-}" = "--lineno" ]; then [ -n "$2" ] && __shunit_lineno="[$2] "; shift 2; fi'
+
+#-----------------------------------------------------------------------------
+# private functions
+
+#-----------------------------------------------------------------------------
+# assert functions
+#
+
+# Assert that two values are equal to one another.
+#
+# Args:
+#   message: string: failure message [optional]
+#   expected: string: expected value
+#   actual: string: actual value
+# Returns:
+#   integer: success (TRUE/FALSE/ERROR constant)
+assertEquals()
+{
+  ${_SHUNIT_LINENO_}
+  if [ $# -lt 2 -o $# -gt 3 ]; then
+    _shunit_error "assertEquals() requires two or three arguments; $# given"
+    _shunit_error "1: ${1:+$1} 2: ${2:+$2} 3: ${3:+$3}${4:+ 4: $4}"
+    return ${SHUNIT_ERROR}
+  fi
+  _shunit_shouldSkip && return ${SHUNIT_TRUE}
+
+  shunit_message_=${__shunit_lineno}
+  if [ $# -eq 3 ]; then
+    shunit_message_="${shunit_message_}$1"
+    shift
+  fi
+  shunit_expected_=$1
+  shunit_actual_=$2
+
+  shunit_return=${SHUNIT_TRUE}
+  if [ "${shunit_expected_}" = "${shunit_actual_}" ]; then
+    _shunit_assertPass
+  else
+    failNotEquals "${shunit_message_}" "${shunit_expected_}" "${shunit_actual_}"
+    shunit_return=${SHUNIT_FALSE}
+  fi
+
+  unset shunit_message_ shunit_expected_ shunit_actual_
+  return ${shunit_return}
+}
+_ASSERT_EQUALS_='eval assertEquals --lineno "${LINENO:-}"'
+
+# Assert that two values are not equal to one another.
+#
+# Args:
+#   message: string: failure message [optional]
+#   expected: string: expected value
+#   actual: string: actual value
+# Returns:
+#   integer: success (TRUE/FALSE/ERROR constant)
+assertNotEquals()
+{
+  ${_SHUNIT_LINENO_}
+  if [ $# -lt 2 -o $# -gt 3 ]; then
+    _shunit_error "assertNotEquals() requires two or three arguments; $# given"
+    return ${SHUNIT_ERROR}
+  fi
+  _shunit_shouldSkip && return ${SHUNIT_TRUE}
+
+  shunit_message_=${__shunit_lineno}
+  if [ $# -eq 3 ]; then
+    shunit_message_="${shunit_message_}$1"
+    shift
+  fi
+  shunit_expected_=$1
+  shunit_actual_=$2
+
+  shunit_return=${SHUNIT_TRUE}
+  if [ "${shunit_expected_}" != "${shunit_actual_}" ]; then
+    _shunit_assertPass
+  else
+    failSame "${shunit_message_}" "$@"
+    shunit_return=${SHUNIT_FALSE}
+  fi
+
+  unset shunit_message_ shunit_expected_ shunit_actual_
+  return ${shunit_return}
+}
+_ASSERT_NOT_EQUALS_='eval assertNotEquals --lineno "${LINENO:-}"'
+
+# Assert that a value is null (i.e. an empty string)
+#
+# Args:
+#   message: string: failure message [optional]
+#   actual: string: actual value
+# Returns:
+#   integer: success (TRUE/FALSE/ERROR constant)
+assertNull()
+{
+  ${_SHUNIT_LINENO_}
+  if [ $# -lt 1 -o $# -gt 2 ]; then
+    _shunit_error "assertNull() requires one or two arguments; $# given"
+    return ${SHUNIT_ERROR}
+  fi
+  _shunit_shouldSkip && return ${SHUNIT_TRUE}
+
+  shunit_message_=${__shunit_lineno}
+  if [ $# -eq 2 ]; then
+    shunit_message_="${shunit_message_}$1"
+    shift
+  fi
+  assertTrue "${shunit_message_}" "[ -z '$1' ]"
+  shunit_return=$?
+
+  unset shunit_message_
+  return ${shunit_return}
+}
+_ASSERT_NULL_='eval assertNull --lineno "${LINENO:-}"'
+
+# Assert that a value is not null (i.e. a non-empty string)
+#
+# Args:
+#   message: string: failure message [optional]
+#   actual: string: actual value
+# Returns:
+#   integer: success (TRUE/FALSE/ERROR constant)
+assertNotNull()
+{
+  ${_SHUNIT_LINENO_}
+  if [ $# -gt 2 ]; then  # allowing 0 arguments as $1 might actually be null
+    _shunit_error "assertNotNull() requires one or two arguments; $# given"
+    return ${SHUNIT_ERROR}
+  fi
+  _shunit_shouldSkip && return ${SHUNIT_TRUE}
+
+  shunit_message_=${__shunit_lineno}
+  if [ $# -eq 2 ]; then
+    shunit_message_="${shunit_message_}$1"
+    shift
+  fi
+  shunit_actual_=`_shunit_escapeCharactersInString "${1:-}"`
+  test -n "${shunit_actual_}"
+  assertTrue "${shunit_message_}" $?
+  shunit_return=$?
+
+  unset shunit_actual_ shunit_message_
+  return ${shunit_return}
+}
+_ASSERT_NOT_NULL_='eval assertNotNull --lineno "${LINENO:-}"'
+
+# Assert that two values are the same (i.e. equal to one another).
+#
+# Args:
+#   message: string: failure message [optional]
+#   expected: string: expected value
+#   actual: string: actual value
+# Returns:
+#   integer: success (TRUE/FALSE/ERROR constant)
+assertSame()
+{
+  ${_SHUNIT_LINENO_}
+  if [ $# -lt 2 -o $# -gt 3 ]; then
+    _shunit_error "assertSame() requires two or three arguments; $# given"
+    return ${SHUNIT_ERROR}
+  fi
+  _shunit_shouldSkip && return ${SHUNIT_TRUE}
+
+  shunit_message_=${__shunit_lineno}
+  if [ $# -eq 3 ]; then
+    shunit_message_="${shunit_message_}$1"
+    shift
+  fi
+  assertEquals "${shunit_message_}" "$1" "$2"
+  shunit_return=$?
+
+  unset shunit_message_
+  return ${shunit_return}
+}
+_ASSERT_SAME_='eval assertSame --lineno "${LINENO:-}"'
+
+# Assert that two values are not the same (i.e. not equal to one another).
+#
+# Args:
+#   message: string: failure message [optional]
+#   expected: string: expected value
+#   actual: string: actual value
+# Returns:
+#   integer: success (TRUE/FALSE/ERROR constant)
+assertNotSame()
+{
+  ${_SHUNIT_LINENO_}
+  if [ $# -lt 2 -o $# -gt 3 ]; then
+    _shunit_error "assertNotSame() requires two or three arguments; $# given"
+    return ${SHUNIT_ERROR}
+  fi
+  _shunit_shouldSkip && return ${SHUNIT_TRUE}
+
+  shunit_message_=${__shunit_lineno}
+  if [ $# -eq 3 ]; then
+    shunit_message_="${shunit_message_:-}$1"
+    shift
+  fi
+  assertNotEquals "${shunit_message_}" "$1" "$2"
+  shunit_return=$?
+
+  unset shunit_message_
+  return ${shunit_return}
+}
+_ASSERT_NOT_SAME_='eval assertNotSame --lineno "${LINENO:-}"'
+
+# Assert that a value or shell test condition is true.
+#
+# In shell, a value of 0 is true and a non-zero value is false. Any integer
+# value passed can thereby be tested.
+#
+# Shell supports much more complicated tests though, and a means to support
+# them was needed. As such, this function tests that conditions are true or
+# false through evaluation rather than just looking for a true or false.
+#
+# The following test will succeed:
+#   assertTrue 0
+#   assertTrue "[ 34 -gt 23 ]"
+# The folloing test will fail with a message:
+#   assertTrue 123
+#   assertTrue "test failed" "[ -r '/non/existant/file' ]"
+#
+# Args:
+#   message: string: failure message [optional]
+#   condition: string: integer value or shell conditional statement
+# Returns:
+#   integer: success (TRUE/FALSE/ERROR constant)
+assertTrue()
+{
+  ${_SHUNIT_LINENO_}
+  if [ $# -lt 1 -o $# -gt 2 ]; then
+    _shunit_error "assertTrue() takes one or two arguments; $# given"
+    return ${SHUNIT_ERROR}
+  fi
+  _shunit_shouldSkip && return ${SHUNIT_TRUE}
+
+  shunit_message_=${__shunit_lineno}
+  if [ $# -eq 2 ]; then
+    shunit_message_="${shunit_message_}$1"
+    shift
+  fi
+  shunit_condition_=$1
+
+  # see if condition is an integer, i.e. a return value
+  shunit_match_=`expr "${shunit_condition_}" : '\([0-9]*\)'`
+  shunit_return=${SHUNIT_TRUE}
+  if [ -z "${shunit_condition_}" ]; then
+    # null condition
+    shunit_return=${SHUNIT_FALSE}
+  elif [ -n "${shunit_match_}" -a "${shunit_condition_}" = "${shunit_match_}" ]
+  then
+    # possible return value. treating 0 as true, and non-zero as false.
+    [ ${shunit_condition_} -ne 0 ] && shunit_return=${SHUNIT_FALSE}
+  else
+    # (hopefully) a condition
+    ( eval ${shunit_condition_} ) >/dev/null 2>&1
+    [ $? -ne 0 ] && shunit_return=${SHUNIT_FALSE}
+  fi
+
+  # record the test
+  if [ ${shunit_return} -eq ${SHUNIT_TRUE} ]; then
+    _shunit_assertPass
+  else
+    _shunit_assertFail "${shunit_message_}"
+  fi
+
+  unset shunit_message_ shunit_condition_ shunit_match_
+  return ${shunit_return}
+}
+_ASSERT_TRUE_='eval assertTrue --lineno "${LINENO:-}"'
+
+# Assert that a value or shell test condition is false.
+#
+# In shell, a value of 0 is true and a non-zero value is false. Any integer
+# value passed can thereby be tested.
+#
+# Shell supports much more complicated tests though, and a means to support
+# them was needed. As such, this function tests that conditions are true or
+# false through evaluation rather than just looking for a true or false.
+#
+# The following test will succeed:
+#   assertFalse 1
+#   assertFalse "[ 'apples' = 'oranges' ]"
+# The folloing test will fail with a message:
+#   assertFalse 0
+#   assertFalse "test failed" "[ 1 -eq 1 -a 2 -eq 2 ]"
+#
+# Args:
+#   message: string: failure message [optional]
+#   condition: string: integer value or shell conditional statement
+# Returns:
+#   integer: success (TRUE/FALSE/ERROR constant)
+assertFalse()
+{
+  ${_SHUNIT_LINENO_}
+  if [ $# -lt 1 -o $# -gt 2 ]; then
+    _shunit_error "assertFalse() quires one or two arguments; $# given"
+    return ${SHUNIT_ERROR}
+  fi
+  _shunit_shouldSkip && return ${SHUNIT_TRUE}
+
+  shunit_message_=${__shunit_lineno}
+  if [ $# -eq 2 ]; then
+    shunit_message_="${shunit_message_}$1"
+    shift
+  fi
+  shunit_condition_=$1
+
+  # see if condition is an integer, i.e. a return value
+  shunit_match_=`expr "${shunit_condition_}" : '\([0-9]*\)'`
+  shunit_return=${SHUNIT_TRUE}
+  if [ -z "${shunit_condition_}" ]; then
+    # null condition
+    shunit_return=${SHUNIT_FALSE}
+  elif [ -n "${shunit_match_}" -a "${shunit_condition_}" = "${shunit_match_}" ]
+  then
+    # possible return value. treating 0 as true, and non-zero as false.
+    [ ${shunit_condition_} -eq 0 ] && shunit_return=${SHUNIT_FALSE}
+  else
+    # (hopefully) a condition
+    ( eval ${shunit_condition_} ) >/dev/null 2>&1
+    [ $? -eq 0 ] && shunit_return=${SHUNIT_FALSE}
+  fi
+
+  # record the test
+  if [ ${shunit_return} -eq ${SHUNIT_TRUE} ]; then
+    _shunit_assertPass
+  else
+    _shunit_assertFail "${shunit_message_}"
+  fi
+
+  unset shunit_message_ shunit_condition_ shunit_match_
+  return ${shunit_return}
+}
+_ASSERT_FALSE_='eval assertFalse --lineno "${LINENO:-}"'
+
+#-----------------------------------------------------------------------------
+# failure functions
+#
+
+# Records a test failure.
+#
+# Args:
+#   message: string: failure message [optional]
+# Returns:
+#   integer: success (TRUE/FALSE/ERROR constant)
+fail()
+{
+  ${_SHUNIT_LINENO_}
+  if [ $# -gt 1 ]; then
+    _shunit_error "fail() requires zero or one arguments; $# given"
+    return ${SHUNIT_ERROR}
+  fi
+  _shunit_shouldSkip && return ${SHUNIT_TRUE}
+
+  shunit_message_=${__shunit_lineno}
+  if [ $# -eq 1 ]; then
+    shunit_message_="${shunit_message_}$1"
+    shift
+  fi
+
+  _shunit_assertFail "${shunit_message_}"
+
+  unset shunit_message_
+  return ${SHUNIT_FALSE}
+}
+_FAIL_='eval fail --lineno "${LINENO:-}"'
+
+# Records a test failure, stating two values were not equal.
+#
+# Args:
+#   message: string: failure message [optional]
+#   expected: string: expected value
+#   actual: string: actual value
+# Returns:
+#   integer: success (TRUE/FALSE/ERROR constant)
+failNotEquals()
+{
+  ${_SHUNIT_LINENO_}
+  if [ $# -lt 2 -o $# -gt 3 ]; then
+    _shunit_error "failNotEquals() requires one or two arguments; $# given"
+    return ${SHUNIT_ERROR}
+  fi
+  _shunit_shouldSkip && return ${SHUNIT_TRUE}
+
+  shunit_message_=${__shunit_lineno}
+  if [ $# -eq 3 ]; then
+    shunit_message_="${shunit_message_}$1"
+    shift
+  fi
+  shunit_expected_=$1
+  shunit_actual_=$2
+
+  _shunit_assertFail "${shunit_message_:+${shunit_message_} }expected:<${shunit_expected_}> but was:<${shunit_actual_}>"
+
+  unset shunit_message_ shunit_expected_ shunit_actual_
+  return ${SHUNIT_FALSE}
+}
+_FAIL_NOT_EQUALS_='eval failNotEquals --lineno "${LINENO:-}"'
+
+# Records a test failure, stating two values should have been the same.
+#
+# Args:
+#   message: string: failure message [optional]
+#   expected: string: expected value
+#   actual: string: actual value
+# Returns:
+#   integer: success (TRUE/FALSE/ERROR constant)
+failSame()
+{
+  ${_SHUNIT_LINENO_}
+  if [ $# -lt 2 -o $# -gt 3 ]; then
+    _shunit_error "failSame() requires two or three arguments; $# given"
+    return ${SHUNIT_ERROR}
+  fi
+  _shunit_shouldSkip && return ${SHUNIT_TRUE}
+
+  shunit_message_=${__shunit_lineno}
+  if [ $# -eq 3 ]; then
+    shunit_message_="${shunit_message_}$1"
+    shift
+  fi
+
+  _shunit_assertFail "${shunit_message_:+${shunit_message_} }expected not same"
+
+  unset shunit_message_
+  return ${SHUNIT_FALSE}
+}
+_FAIL_SAME_='eval failSame --lineno "${LINENO:-}"'
+
+# Records a test failure, stating two values were not equal.
+#
+# This is functionally equivalent to calling failNotEquals().
+#
+# Args:
+#   message: string: failure message [optional]
+#   expected: string: expected value
+#   actual: string: actual value
+# Returns:
+#   integer: success (TRUE/FALSE/ERROR constant)
+failNotSame()
+{
+  ${_SHUNIT_LINENO_}
+  if [ $# -lt 2 -o $# -gt 3 ]; then
+    _shunit_error "failNotEquals() requires one or two arguments; $# given"
+    return ${SHUNIT_ERROR}
+  fi
+  _shunit_shouldSkip && return ${SHUNIT_TRUE}
+
+  shunit_message_=${__shunit_lineno}
+  if [ $# -eq 3 ]; then
+    shunit_message_="${shunit_message_}$1"
+    shift
+  fi
+  failNotEquals "${shunit_message_}" "$1" "$2"
+  shunit_return=$?
+
+  unset shunit_message_
+  return ${shunit_return}
+}
+_FAIL_NOT_SAME_='eval failNotSame --lineno "${LINENO:-}"'
+
+#-----------------------------------------------------------------------------
+# skipping functions
+#
+
+# Force remaining assert and fail functions to be "skipped".
+#
+# This function forces the remaining assert and fail functions to be "skipped",
+# i.e. they will have no effect. Each function skipped will be recorded so that
+# the total of asserts and fails will not be altered.
+#
+# Args:
+#   None
+startSkipping()
+{
+  __shunit_skip=${SHUNIT_TRUE}
+}
+
+# Resume the normal recording behavior of assert and fail calls.
+#
+# Args:
+#   None
+endSkipping()
+{
+  __shunit_skip=${SHUNIT_FALSE}
+}
+
+# Returns the state of assert and fail call skipping.
+#
+# Args:
+#   None
+# Returns:
+#   boolean: (TRUE/FALSE constant)
+isSkipping()
+{
+  return ${__shunit_skip}
+}
+
+#-----------------------------------------------------------------------------
+# suite functions
+#
+
+# Stub. This function should contains all unit test calls to be made.
+#
+# DEPRECATED (as of 2.1.0)
+#
+# This function can be optionally overridden by the user in their test suite.
+#
+# If this function exists, it will be called when shunit2 is sourced. If it
+# does not exist, shunit2 will search the parent script for all functions
+# beginning with the word 'test', and they will be added dynamically to the
+# test suite.
+#
+# This function should be overridden by the user in their unit test suite.
+# Note: see _shunit_mktempFunc() for actual implementation
+#
+# Args:
+#   None
+#suite() { :; }  # DO NOT UNCOMMENT THIS FUNCTION
+
+# Adds a function name to the list of tests schedule for execution.
+#
+# This function should only be called from within the suite() function.
+#
+# Args:
+#   function: string: name of a function to add to current unit test suite
+suite_addTest()
+{
+  shunit_func_=${1:-}
+
+  __shunit_suite="${__shunit_suite:+${__shunit_suite} }${shunit_func_}"
+  __shunit_testsTotal=`expr ${__shunit_testsTotal} + 1`
+
+  unset shunit_func_
+}
+
+# Stub. This function will be called once before any tests are run.
+#
+# Common one-time environment preparation tasks shared by all tests can be
+# defined here.
+#
+# This function should be overridden by the user in their unit test suite.
+# Note: see _shunit_mktempFunc() for actual implementation
+#
+# Args:
+#   None
+#oneTimeSetUp() { :; }  # DO NOT UNCOMMENT THIS FUNCTION
+
+# Stub. This function will be called once after all tests are finished.
+#
+# Common one-time environment cleanup tasks shared by all tests can be defined
+# here.
+#
+# This function should be overridden by the user in their unit test suite.
+# Note: see _shunit_mktempFunc() for actual implementation
+#
+# Args:
+#   None
+#oneTimeTearDown() { :; }  # DO NOT UNCOMMENT THIS FUNCTION
+
+# Stub. This function will be called before each test is run.
+#
+# Common environment preparation tasks shared by all tests can be defined here.
+#
+# This function should be overridden by the user in their unit test suite.
+# Note: see _shunit_mktempFunc() for actual implementation
+#
+# Args:
+#   None
+#setUp() { :; }
+
+# Note: see _shunit_mktempFunc() for actual implementation
+# Stub. This function will be called after each test is run.
+#
+# Common environment cleanup tasks shared by all tests can be defined here.
+#
+# This function should be overridden by the user in their unit test suite.
+# Note: see _shunit_mktempFunc() for actual implementation
+#
+# Args:
+#   None
+#tearDown() { :; }  # DO NOT UNCOMMENT THIS FUNCTION
+
+#------------------------------------------------------------------------------
+# internal shUnit2 functions
+#
+
+# Create a temporary directory to store various run-time files in.
+#
+# This function is a cross-platform temporary directory creation tool. Not all
+# OSes have the mktemp function, so one is included here.
+#
+# Args:
+#   None
+# Outputs:
+#   string: the temporary directory that was created
+_shunit_mktempDir()
+{
+  # try the standard mktemp function
+  ( exec mktemp -dqt shunit.XXXXXX 2>/dev/null ) && return
+
+  # the standard mktemp didn't work.  doing our own.
+  if [ -r '/dev/urandom' -a -x '/usr/bin/od' ]; then
+    _shunit_random_=`/usr/bin/od -vAn -N4 -tx4 </dev/urandom \
+        |sed 's/^[^0-9a-f]*//'`
+  elif [ -n "${RANDOM:-}" ]; then
+    # $RANDOM works
+    _shunit_random_=${RANDOM}${RANDOM}${RANDOM}$$
+  else
+    # $RANDOM doesn't work
+    _shunit_date_=`date '+%Y%m%d%H%M%S'`
+    _shunit_random_=`expr ${_shunit_date_} / $$`
+  fi
+
+  _shunit_tmpDir_="${TMPDIR:-/tmp}/shunit.${_shunit_random_}"
+  ( umask 077 && mkdir "${_shunit_tmpDir_}" ) || \
+      _shunit_fatal 'could not create temporary directory! exiting'
+
+  echo ${_shunit_tmpDir_}
+  unset _shunit_date_ _shunit_random_ _shunit_tmpDir_
+}
+
+# This function is here to work around issues in Cygwin.
+#
+# Args:
+#   None
+_shunit_mktempFunc()
+{
+  for _shunit_func_ in oneTimeSetUp oneTimeTearDown setUp tearDown suite noexec
+  do
+    _shunit_file_="${__shunit_tmpDir}/${_shunit_func_}"
+    cat <<EOF >"${_shunit_file_}"
+#! /bin/sh
+exit ${SHUNIT_TRUE}
+EOF
+    chmod +x "${_shunit_file_}"
+  done
+
+  unset _shunit_file_
+}
+
+# Final cleanup function to leave things as we found them.
+#
+# Besides removing the temporary directory, this function is in charge of the
+# final exit code of the unit test. The exit code is based on how the script
+# was ended (e.g. normal exit, or via Ctrl-C).
+#
+# Args:
+#   name: string: name of the trap called (specified when trap defined)
+_shunit_cleanup()
+{
+  _shunit_name_=$1
+
+  case ${_shunit_name_} in
+    EXIT) _shunit_signal_=0 ;;
+    INT) _shunit_signal_=2 ;;
+    TERM) _shunit_signal_=15 ;;
+    *)
+      _shunit_warn "unrecognized trap value (${_shunit_name_})"
+      _shunit_signal_=0
+      ;;
+  esac
+
+  # do our work
+  rm -fr "${__shunit_tmpDir}"
+
+  # exit for all non-EXIT signals
+  if [ ${_shunit_name_} != 'EXIT' ]; then
+    _shunit_warn "trapped and now handling the (${_shunit_name_}) signal"
+    # disable EXIT trap
+    trap 0
+    # add 128 to signal and exit
+    exit `expr ${_shunit_signal_} + 128`
+  elif [ ${__shunit_reportGenerated} -eq ${SHUNIT_FALSE} ] ; then
+    _shunit_assertFail 'Unknown failure encountered running a test'
+    _shunit_generateReport
+    exit ${SHUNIT_ERROR}
+  fi
+
+  unset _shunit_name_ _shunit_signal_
+}
+
+# The actual running of the tests happens here.
+#
+# Args:
+#   None
+_shunit_execSuite()
+{
+  for _shunit_test_ in ${__shunit_suite}; do
+    __shunit_testSuccess=${SHUNIT_TRUE}
+
+    # disable skipping
+    endSkipping
+
+    # execute the per-test setup function
+    setUp
+
+    # execute the test
+    echo "${_shunit_test_}"
+    eval ${_shunit_test_}
+
+    # execute the per-test tear-down function
+    tearDown
+
+    # update stats
+    if [ ${__shunit_testSuccess} -eq ${SHUNIT_TRUE} ]; then
+      __shunit_testsPassed=`expr ${__shunit_testsPassed} + 1`
+    else
+      __shunit_testsFailed=`expr ${__shunit_testsFailed} + 1`
+    fi
+  done
+
+  unset _shunit_test_
+}
+
+# Generates the user friendly report with appropriate OK/FAILED message.
+#
+# Args:
+#   None
+# Output:
+#   string: the report of successful and failed tests, as well as totals.
+_shunit_generateReport()
+{
+  _shunit_ok_=${SHUNIT_TRUE}
+
+  # if no exit code was provided one, determine an appropriate one
+  [ ${__shunit_testsFailed} -gt 0 \
+      -o ${__shunit_testSuccess} -eq ${SHUNIT_FALSE} ] \
+          && _shunit_ok_=${SHUNIT_FALSE}
+
+  echo
+  if [ ${__shunit_testsTotal} -eq 1 ]; then
+    echo "Ran ${__shunit_testsTotal} test."
+  else
+    echo "Ran ${__shunit_testsTotal} tests."
+  fi
+
+  _shunit_failures_=''
+  _shunit_skipped_=''
+  [ ${__shunit_assertsFailed} -gt 0 ] \
+      && _shunit_failures_="failures=${__shunit_assertsFailed}"
+  [ ${__shunit_assertsSkipped} -gt 0 ] \
+      && _shunit_skipped_="skipped=${__shunit_assertsSkipped}"
+
+  if [ ${_shunit_ok_} -eq ${SHUNIT_TRUE} ]; then
+    _shunit_msg_='OK'
+    [ -n "${_shunit_skipped_}" ] \
+        && _shunit_msg_="${_shunit_msg_} (${_shunit_skipped_})"
+  else
+    _shunit_msg_="FAILED (${_shunit_failures_}"
+    [ -n "${_shunit_skipped_}" ] \
+        && _shunit_msg_="${_shunit_msg_},${_shunit_skipped_}"
+    _shunit_msg_="${_shunit_msg_})"
+  fi
+
+  echo
+  echo ${_shunit_msg_}
+  __shunit_reportGenerated=${SHUNIT_TRUE}
+
+  unset _shunit_failures_ _shunit_msg_ _shunit_ok_ _shunit_skipped_
+}
+
+# Test for whether a function should be skipped.
+#
+# Args:
+#   None
+# Returns:
+#   boolean: whether the test should be skipped (TRUE/FALSE constant)
+_shunit_shouldSkip()
+{
+  [ ${__shunit_skip} -eq ${SHUNIT_FALSE} ] && return ${SHUNIT_FALSE}
+  _shunit_assertSkip
+}
+
+# Records a successful test.
+#
+# Args:
+#   None
+_shunit_assertPass()
+{
+  __shunit_assertsPassed=`expr ${__shunit_assertsPassed} + 1`
+  __shunit_assertsTotal=`expr ${__shunit_assertsTotal} + 1`
+}
+
+# Records a test failure.
+#
+# Args:
+#   message: string: failure message to provide user
+_shunit_assertFail()
+{
+  _shunit_msg_=$1
+
+  __shunit_testSuccess=${SHUNIT_FALSE}
+  __shunit_assertsFailed=`expr ${__shunit_assertsFailed} + 1`
+  __shunit_assertsTotal=`expr ${__shunit_assertsTotal} + 1`
+  echo "${__SHUNIT_ASSERT_MSG_PREFIX}${_shunit_msg_}"
+
+  unset _shunit_msg_
+}
+
+# Records a skipped test.
+#
+# Args:
+#   None
+_shunit_assertSkip()
+{
+  __shunit_assertsSkipped=`expr ${__shunit_assertsSkipped} + 1`
+  __shunit_assertsTotal=`expr ${__shunit_assertsTotal} + 1`
+}
+
+# Prepare a script filename for sourcing.
+#
+# Args:
+#   script: string: path to a script to source
+# Returns:
+#   string: filename prefixed with ./ (if necessary)
+_shunit_prepForSourcing()
+{
+  _shunit_script_=$1
+  case "${_shunit_script_}" in
+    /*|./*) echo "${_shunit_script_}" ;;
+    *) echo "./${_shunit_script_}" ;;
+  esac
+  unset _shunit_script_
+}
+
+# Escape a character in a string.
+#
+# Args:
+#   c: string: unescaped character
+#   s: string: to escape character in
+# Returns:
+#   string: with escaped character(s)
+_shunit_escapeCharInStr()
+{
+  [ -n "$2" ] || return  # no point in doing work on an empty string
+
+  # Note: using shorter variable names to prevent conflicts with
+  # _shunit_escapeCharactersInString().
+  _shunit_c_=$1
+  _shunit_s_=$2
+
+
+  # escape the character
+  echo ''${_shunit_s_}'' |sed 's/\'${_shunit_c_}'/\\\'${_shunit_c_}'/g'
+
+  unset _shunit_c_ _shunit_s_
+}
+
+# Escape a character in a string.
+#
+# Args:
+#   str: string: to escape characters in
+# Returns:
+#   string: with escaped character(s)
+_shunit_escapeCharactersInString()
+{
+  [ -n "$1" ] || return  # no point in doing work on an empty string
+
+  _shunit_str_=$1
+
+  # Note: using longer variable names to prevent conflicts with
+  # _shunit_escapeCharInStr().
+  for _shunit_char_ in '"' '$' "'" '`'; do
+    _shunit_str_=`_shunit_escapeCharInStr "${_shunit_char_}" "${_shunit_str_}"`
+  done
+
+  echo "${_shunit_str_}"
+  unset _shunit_char_ _shunit_str_
+}
+
+# Extract list of functions to run tests against.
+#
+# Args:
+#   script: string: name of script to extract functions from
+# Returns:
+#   string: of function names
+_shunit_extractTestFunctions()
+{
+  _shunit_script_=$1
+
+  # extract the lines with test function names, strip of anything besides the
+  # function name, and output everything on a single line.
+  _shunit_regex_='^[ 	]*(function )*test[A-Za-z0-9_]* *\(\)'
+  egrep "${_shunit_regex_}" "${_shunit_script_}" \
+  |sed 's/^[^A-Za-z0-9_]*//;s/^function //;s/\([A-Za-z0-9_]*\).*/\1/g' \
+  |xargs
+
+  unset _shunit_regex_ _shunit_script_
+}
+
+#------------------------------------------------------------------------------
+# main
+#
+
+# determine the operating mode
+if [ $# -eq 0 ]; then
+  __shunit_script=${__SHUNIT_PARENT}
+  __shunit_mode=${__SHUNIT_MODE_SOURCED}
+else
+  __shunit_script=$1
+  [ -r "${__shunit_script}" ] || \
+      _shunit_fatal "unable to read from ${__shunit_script}"
+  __shunit_mode=${__SHUNIT_MODE_STANDALONE}
+fi
+
+# create a temporary storage location
+__shunit_tmpDir=`_shunit_mktempDir`
+
+# provide a public temporary directory for unit test scripts
+# TODO(kward): document this
+SHUNIT_TMPDIR="${__shunit_tmpDir}/tmp"
+mkdir "${SHUNIT_TMPDIR}"
+
+# setup traps to clean up after ourselves
+trap '_shunit_cleanup EXIT' 0
+trap '_shunit_cleanup INT' 2
+trap '_shunit_cleanup TERM' 15
+
+# create phantom functions to work around issues with Cygwin
+_shunit_mktempFunc
+PATH="${__shunit_tmpDir}:${PATH}"
+
+# make sure phantom functions are executable. this will bite if /tmp (or the
+# current $TMPDIR) points to a path on a partition that was mounted with the
+# 'noexec' option. the noexec command was created with _shunit_mktempFunc().
+noexec 2>/dev/null || _shunit_fatal \
+    'please declare TMPDIR with path on partition with exec permission'
+
+# we must manually source the tests in standalone mode
+if [ "${__shunit_mode}" = "${__SHUNIT_MODE_STANDALONE}" ]; then
+  . "`_shunit_prepForSourcing \"${__shunit_script}\"`"
+fi
+
+# execute the oneTimeSetUp function (if it exists)
+oneTimeSetUp
+
+# execute the suite function defined in the parent test script
+# deprecated as of 2.1.0
+suite
+
+# if no suite function was defined, dynamically build a list of functions
+if [ -z "${__shunit_suite}" ]; then
+  shunit_funcs_=`_shunit_extractTestFunctions "${__shunit_script}"`
+  for shunit_func_ in ${shunit_funcs_}; do
+    suite_addTest ${shunit_func_}
+  done
+fi
+unset shunit_func_ shunit_funcs_
+
+# execute the tests
+_shunit_execSuite
+
+# execute the oneTimeTearDown function (if it exists)
+oneTimeTearDown
+
+# generate the report
+_shunit_generateReport
+
+# that's it folks
+[ ${__shunit_testsFailed} -eq 0 ]
+exit $?
