#!/bin/sh

setvar test_description = ''log/show --expand-tabs''

source ./test-lib.sh

setvar HT = ""	""
setvar title = ''tab indent at the beginning of the title line''
setvar body = ''tab indent on a line in the body''

# usage: count_expand $indent $numSP $numHT @format_args
proc count_expand {
	setvar expect = ''
	setvar count = $(( $1 + $2 )) ;# expected spaces
	while test $count -gt 0
	{
		setvar expect = ""$expect ""
		setvar count = $(( $count - 1 ))
	}
	shift 2
	setvar count = "$1" ;# expected tabs
	while test $count -gt 0
	{
		setvar expect = ""$expect$HT""
		setvar count = $(( $count - 1 ))
	}
	shift

	# The remainder of the command line is "git show -s" options
	case{
	*' --pretty=short '* {
		setvar line = "$title" }
	* {
		setvar line = "$body" }
	}

	# Prefix the output with the command line arguments, and
	# replace SP with a dot both in the expecte and actual output
	# so that test_cmp would show the differene together with the
	# breakage in a way easier to consume by the debugging user.
	do {
		echo "git show -s $[join(ARGV)]"
		echo "$expect$line"
	} | sed -e 's/ /./g' >expect

	do {
		echo "git show -s $[join(ARGV)]"
		git show -s @ARGV |
		sed -n -e "/$line\$/p"
	} | sed -e 's/ /./g' >actual

	test_cmp expect actual
}

proc test_expand {
	setvar fmt = "$1"
	case (fmt) {
	*=raw | *=short | *=email {
		setvar default = ""0 1"" }
	* {
		setvar default = ""8 0"" }
	}
	case (fmt) {
	*=email {
		setvar in = '0' }
	* {
		setvar in = '4' }
	}
	test_expect_success "expand/no-expand${fmt:+ for $fmt}" '
		count_expand $in $default $fmt &&
		count_expand $in 8 0 $fmt --expand-tabs &&
		count_expand $in 8 0 --expand-tabs $fmt &&
		count_expand $in 8 0 $fmt --expand-tabs=8 &&
		count_expand $in 8 0 --expand-tabs=8 $fmt &&
		count_expand $in 0 1 $fmt --no-expand-tabs &&
		count_expand $in 0 1 --no-expand-tabs $fmt &&
		count_expand $in 0 1 $fmt --expand-tabs=0 &&
		count_expand $in 0 1 --expand-tabs=0 $fmt &&
		count_expand $in 4 0 $fmt --expand-tabs=4 &&
		count_expand $in 4 0 --expand-tabs=4 $fmt
	'
}

test_expect_success 'setup' '
	test_tick &&
	sed -e "s/Q/$HT/g" <<-EOF >msg &&
	Q$title

	Q$body
	EOF
	git commit --allow-empty -F msg
'

test_expand ""
test_expand --pretty
test_expand --pretty=short
test_expand --pretty=medium
test_expand --pretty=full
test_expand --pretty=fuller
test_expand --pretty=raw
test_expand --pretty=email

test_done