420 lines
11 KiB
Bash
420 lines
11 KiB
Bash
# !/usr/bin/env bash
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#
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# stub.sh 1.0.2 - stubbing helpers for simplifying bash script tests.
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# https://github.com/jimeh/stub.sh
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#
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# (The MIT License)
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#
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# Copyright (c) 2014 Jim Myhrberg.
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#
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# Permission is hereby granted, free of charge, to any person obtaining a copy
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# of this software and associated documentation files (the "Software"), to
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# deal in the Software without restriction, including without limitation the
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# rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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# sell copies of the Software, and to permit persons to whom the Software is
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# furnished to do so, subject to the following conditions:
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#
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# The above copyright notice and this permission notice shall be included in
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# all copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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# IN THE SOFTWARE.
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#
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# Public: Stub given command.
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#
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# Arguments:
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# - $1: Name of command to stub.
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# - $2: (optional) When set to "STDOUT", echo a default message to STDOUT.
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# When set to "STDERR", echo default message to STDERR.
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#
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# Echoes nothing.
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# Returns nothing.
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stub() {
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local redirect="null"
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if [ "$2" = "stdout" ] || [ "$2" = "STDOUT" ]; then redirect=""; fi
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if [ "$2" = "stderr" ] || [ "$2" = "STDERR" ]; then redirect="stderr"; fi
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stub_and_echo "$1" "$1 stub: \$@" "$redirect"
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}
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# Public: Stub given command, and echo given string.
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#
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# Arguments:
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# - $1: Name of command to stub.
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# - $2: String to echo when stub is called.
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# - $3: (optional) When set to "STDERR", echo to STDERR instead of STDOUT.
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# When set to "null", all output is redirected to /dev/null.
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#
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# Echoes nothing.
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# Returns nothing.
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stub_and_echo() {
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local redirect=""
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if [ "$3" = "stderr" ] || [ "$3" = "STDERR" ]; then redirect=" 1>&2"; fi
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if [ "$3" = "null" ]; then redirect=" &>/dev/null"; fi
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stub_and_eval "$1" "echo \"$2\"$redirect"
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}
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# Public: Stub given command, and execute given string with eval.
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#
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# Arguments:
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# - $1: Name of command to stub.
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# - $2: String to eval when stub is called.
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#
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# Echoes nothing.
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# Returns nothing.
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stub_and_eval() {
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local cmd="$1"
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# Setup empty list of active stubs.
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if [ -z "$STUB_ACTIVE_STUBS" ]; then STUB_ACTIVE_STUBS=(); fi
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# If stubbing a function, store non-stubbed copy of it required for restore.
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if [ -n "$(command -v "$cmd")" ]; then
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if [ -z "$(command -v "non_stubbed_${cmd}")" ]; then
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if [[ "$(type "$cmd" | head -1)" == *"is a function" ]]; then
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local source="$(type "$cmd" | tail -n +2)"
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source="${source/$cmd/non_stubbed_${cmd}}"
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eval "$source"
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fi
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fi
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fi
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# Prepare stub index and call list for this stub.
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__stub_register "$cmd"
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# Keep track of what is currently stubbed to ensure restore only acts on
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# actual stubs.
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if [[ " ${STUB_ACTIVE_STUBS[@]} " != *" $cmd "* ]]; then
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STUB_ACTIVE_STUBS+=("$cmd")
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fi
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# Create the stub.
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eval "$( printf "%s" "${cmd}() { __stub_call \"${cmd}\" \$@; $2;}")"
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}
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# Public: Find out if stub has been called. Returns 0 if yes, 1 if no.
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#
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# Arguments:
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# - $1: Name of stubbed command.
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#
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# Echoes nothing.
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# Returns 0 (success) is stub has been called, 1 (error) otherwise.
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stub_called() {
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if [ "$(stub_called_times "$1")" -lt 1 ]; then
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return 1
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fi
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}
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# Public: Find out if stub has been called with specific arguments.
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#
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# Arguments:
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# - $1: Name of stubbed command.
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# - $@: Any/all additional arguments are used to specify what stub was
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# called with.
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#
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# Examples:
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# stub uname
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# uname
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# uname -r -a
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# stub_called_with uname # Returns 0 (success).
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# stub_called_with uname -r # Returns 1 (error).
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# stub_called_with uname -r -a # Returns 0 (success).
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#
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# Echoes nothing.
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# Returns 0 (success) if specified stub has been called with given arguments,
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# otherwise returns 1 (error).
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stub_called_with() {
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local cmd="$1"
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shift 1
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if [ "$(stub_called_with_times "$cmd" $@)" -lt 1 ]; then
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return 1
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fi
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}
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# Public: Find out how many times a stub has been called.
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#
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# Arguments:
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# - $1: Name of stubbed command.
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#
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# Echoes number of times stub has been called if $2 is not given, otherwise
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# echoes nothing.
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# Returns 0 (success) if $2 is not given, or if it is given and it matches the
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# number of times the stub has been called. Otherwise 1 (error) is returned if
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# it doesn't match..
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stub_called_times() {
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local cmd="$1"
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local index="$(__stub_index "$1")"
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local count=0
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if [ -n "$index" ]; then
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eval "count=\"\${#STUB_${index}_CALLS[@]}\""
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fi
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echo $count
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}
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# Public: Find out if stub has been called exactly the given number of times
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# with specified arguments.
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#
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# Arguments:
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# - $1: Name of stubbed command.
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# - $2: Exact number of times stub has been called.
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#
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# Echoes nothing.
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# Returns 0 (success) if stub has been called at least the given number of
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# times with specified arguments, otherwise 1 (error) is returned.
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stub_called_exactly_times() {
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if [ "$(stub_called_times "$1")" != "$2" ]; then
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return 1
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fi
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}
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# Public: Find out if stub has been called at least the given number of times.
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#
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# Arguments:
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# - $1: Name of stubbed command.
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# - $2: Minimum required number of times stub has been called.
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#
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# Echoes nothing.
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# Returns 0 (success) if stub has been called at least the given number of
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# times, otherwise 1 (error) is returned.
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stub_called_at_least_times() {
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if [ "$(stub_called_times "$1")" -lt "$2" ]; then
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return 1
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fi
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}
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# Public: Find out if stub has been called no more than the given number of
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# times.
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#
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# Arguments:
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# - $1: Name of stubbed command.
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# - $2: Maximum allowed number of times stub has been called.
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#
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# Echoes nothing.
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# Returns 0 (success) if stub has been called no more than the given number of
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# times, otherwise 1 (error) is returned.
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stub_called_at_most_times() {
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if [ "$(stub_called_times "$1")" -gt "$2" ]; then
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return 1
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fi
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}
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# Public: Find out how many times a stub has been called with specific
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# arguments.
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#
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# Arguments:
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# - $1: Name of stubbed command.
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# - $@: Any/all additional arguments are used to specify what stub was
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# called with.
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#
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# Echoes number of times stub has been called with given arguments.
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# Return 0 (success).
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stub_called_with_times() {
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local cmd="$1"
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shift 1
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local args="$@"
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if [ "$args" = "" ]; then args="<none>"; fi
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local count=0
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local index="$(__stub_index "$cmd")"
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if [ -n "$index" ]; then
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eval "local calls=(\"\${STUB_${index}_CALLS[@]}\")"
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for call in "${calls[@]}"; do
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if [ "$call" = "$args" ]; then ((count++)); fi
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done
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fi
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echo $count
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}
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# Public: Find out if stub has been called exactly the given number of times
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# with specified arguments.
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#
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# Arguments:
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# - $1: Name of stubbed command.
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# - $2: Exact number of times stub has been called.
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# - $@: Any/all additional arguments are used to specify what stub was
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# called with.
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#
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# Echoes nothing.
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# Returns 0 (success) if stub has been called at least the given number of
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# times with specified arguments, otherwise 1 (error) is returned.
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stub_called_with_exactly_times() {
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local cmd="$1"
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local count="$2"
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shift 2
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if [ "$(stub_called_with_times "$cmd" $@)" != "$count" ]; then
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return 1
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fi
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}
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# Public: Find out if stub has been called at least the given number of times
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# with specified arguments.
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#
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# Arguments:
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# - $1: Name of stubbed command.
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# - $2: Minimum required number of times stub has been called.
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# - $@: Any/all additional arguments are used to specify what stub was
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# called with.
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#
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# Echoes nothing.
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# Returns 0 (success) if stub has been called at least the given number of
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# times with specified arguments, otherwise 1 (error) is returned.
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stub_called_with_at_least_times() {
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local cmd="$1"
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local count="$2"
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shift 2
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if [ "$(stub_called_with_times "$cmd" $@)" -lt "$count" ]; then
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return 1
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fi
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}
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# Public: Find out if stub has been called no more than the given number of
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# times.
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#
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# Arguments:
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# - $1: Name of stubbed command.
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# - $2: Maximum allowed number of times stub has been called.
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# - $@: Any/all additional arguments are used to specify what stub was
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# called with.
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#
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# Echoes nothing.
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# Returns 0 (success) if stub has been called no more than the given number of
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# times with specified arguments, otherwise 1 (error) is returned.
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stub_called_with_at_most_times() {
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local cmd="$1"
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local count="$2"
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shift 2
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if [ "$(stub_called_with_times "$cmd" $@)" -gt "$count" ]; then
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return 1
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fi
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}
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# Public: Restore the original command/function that was stubbed.
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#
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# Arguments:
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# - $1: Name of command to restore.
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#
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# Echoes nothing.
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# Returns nothing.
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restore() {
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local cmd="$1"
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# Don't do anything if the command isn't currently stubbed.
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if [[ " ${STUB_ACTIVE_STUBS[@]} " != *" $1 "* ]]; then
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return 0
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fi
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# Remove stub functions.
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unset -f "$cmd"
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# Remove stub from list of active stubs.
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STUB_ACTIVE_STUBS=(${STUB_ACTIVE_STUBS[@]/$cmd/})
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# If stub was for a function, restore the original function.
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if type "non_stubbed_${cmd}" &>/dev/null; then
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local original_type="$(type "non_stubbed_${cmd}" | head -1)"
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if [[ "$original_type" == *"is a function" ]]; then
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local source="$(type "non_stubbed_$cmd" | tail -n +2)"
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source="${source/non_stubbed_${cmd}/$cmd}"
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eval "$source"
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unset -f "non_stubbed_${cmd}"
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fi
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fi
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}
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#
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# Internal functions
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#
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# Private: Used to keep track of which stubs have been called and how many
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# times.
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__stub_call() {
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local cmd="$1"
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shift 1
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local args="$@"
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if [ "$args" = "" ]; then args="<none>"; fi
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local index="$(__stub_index "$cmd")"
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if [ -n "$index" ]; then
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eval "STUB_${index}_CALLS+=(\"\$args\")"
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fi
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}
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# Private: Get index value of stub. Required to access list of stub calls.
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__stub_index() {
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local cmd="$1"
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for item in ${STUB_INDEX[@]}; do
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if [[ "$item" = "${cmd}="* ]]; then
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local index="$item"
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index="${index/${cmd}=/}"
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echo "$index"
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fi
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done
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}
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# Private: Prepare for the creation of a new stub. Adds stub to index and
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# sets up an empty call list.
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__stub_register() {
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local cmd="$1"
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if [ -z "$STUB_NEXT_INDEX" ]; then STUB_NEXT_INDEX=0; fi
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if [ -z "$STUB_INDEX" ]; then STUB_INDEX=(); fi
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# Clean up after any previous stub for the same command.
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__stub_clean "$cmd"
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# Add stub to index.
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STUB_INDEX+=("${cmd}=${STUB_NEXT_INDEX}")
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eval "STUB_${STUB_NEXT_INDEX}_CALLS=()"
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# Increment stub count.
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((STUB_NEXT_INDEX++))
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}
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# Private: Cleans out and removes a stub's call list, and removes stub from
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# index.
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__stub_clean() {
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local cmd="$1"
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local index="$(__stub_index "$cmd")"
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# Remove all relevant details from any previously existing stub for the same
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# command.
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if [ -n "$index" ]; then
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eval "unset STUB_${index}_CALLS"
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STUB_INDEX=(${STUB_INDEX[@]/${cmd}=*/})
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fi
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}
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