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#!/bin/sh
 
test_description='diff whitespace error detection'
 
. ./test-lib.sh
 
test_expect_success setup '
 
	git config diff.color.whitespace "blue reverse" &&
	>F &&
	git add F &&
	echo "         Eight SP indent" >>F &&
	echo " 	HT and SP indent" >>F &&
	echo "With trailing SP " >>F &&
	echo "Carriage ReturnQ" | tr Q "\015" >>F &&
	echo "No problem" >>F &&
	echo >>F
 
'
 
blue_grep='7;34m' ;# ESC [ 7 ; 3 4 m
 
test_expect_success default '
 
	git diff --color >output
	grep "$blue_grep" output >error
	grep -v "$blue_grep" output >normal
 
	grep Eight normal >/dev/null &&
	grep HT error >/dev/null &&
	grep With error >/dev/null &&
	grep Return error >/dev/null &&
	grep No normal >/dev/null
 
'
 
test_expect_success 'without -trail' '
 
	git config core.whitespace -trail
	git diff --color >output
	grep "$blue_grep" output >error
	grep -v "$blue_grep" output >normal
 
	grep Eight normal >/dev/null &&
	grep HT error >/dev/null &&
	grep With normal >/dev/null &&
	grep Return normal >/dev/null &&
	grep No normal >/dev/null
 
'
 
test_expect_success 'without -trail (attribute)' '
 
	git config --unset core.whitespace
	echo "F whitespace=-trail" >.gitattributes
	git diff --color >output
	grep "$blue_grep" output >error
	grep -v "$blue_grep" output >normal
 
	grep Eight normal >/dev/null &&
	grep HT error >/dev/null &&
	grep With normal >/dev/null &&
	grep Return normal >/dev/null &&
	grep No normal >/dev/null
 
'
 
test_expect_success 'without -space' '
 
	rm -f .gitattributes
	git config core.whitespace -space
	git diff --color >output
	grep "$blue_grep" output >error
	grep -v "$blue_grep" output >normal
 
	grep Eight normal >/dev/null &&
	grep HT normal >/dev/null &&
	grep With error >/dev/null &&
	grep Return error >/dev/null &&
	grep No normal >/dev/null
 
'
 
test_expect_success 'without -space (attribute)' '
 
	git config --unset core.whitespace
	echo "F whitespace=-space" >.gitattributes
	git diff --color >output
	grep "$blue_grep" output >error
	grep -v "$blue_grep" output >normal
 
	grep Eight normal >/dev/null &&
	grep HT normal >/dev/null &&
	grep With error >/dev/null &&
	grep Return error >/dev/null &&
	grep No normal >/dev/null
 
'
 
test_expect_success 'with indent-non-tab only' '
 
	rm -f .gitattributes
	git config core.whitespace indent,-trailing,-space
	git diff --color >output
	grep "$blue_grep" output >error
	grep -v "$blue_grep" output >normal
 
	grep Eight error >/dev/null &&
	grep HT normal >/dev/null &&
	grep With normal >/dev/null &&
	grep Return normal >/dev/null &&
	grep No normal >/dev/null
 
'
 
test_expect_success 'with indent-non-tab only (attribute)' '
 
	git config --unset core.whitespace
	echo "F whitespace=indent,-trailing,-space" >.gitattributes
	git diff --color >output
	grep "$blue_grep" output >error
	grep -v "$blue_grep" output >normal
 
	grep Eight error >/dev/null &&
	grep HT normal >/dev/null &&
	grep With normal >/dev/null &&
	grep Return normal >/dev/null &&
	grep No normal >/dev/null
 
'
 
test_expect_success 'with cr-at-eol' '
 
	rm -f .gitattributes
	git config core.whitespace cr-at-eol
	git diff --color >output
	grep "$blue_grep" output >error
	grep -v "$blue_grep" output >normal
 
	grep Eight normal >/dev/null &&
	grep HT error >/dev/null &&
	grep With error >/dev/null &&
	grep Return normal >/dev/null &&
	grep No normal >/dev/null
 
'
 
test_expect_success 'with cr-at-eol (attribute)' '
 
	git config --unset core.whitespace
	echo "F whitespace=trailing,cr-at-eol" >.gitattributes
	git diff --color >output
	grep "$blue_grep" output >error
	grep -v "$blue_grep" output >normal
 
	grep Eight normal >/dev/null &&
	grep HT error >/dev/null &&
	grep With error >/dev/null &&
	grep Return normal >/dev/null &&
	grep No normal >/dev/null
 
'
 
test_expect_success 'trailing empty lines (1)' '
 
	rm -f .gitattributes &&
	test_must_fail git diff --check >output &&
	grep "ends with blank lines." output &&
	grep "trailing whitespace" output
 
'
 
test_expect_success 'trailing empty lines (2)' '
 
	echo "F -whitespace" >.gitattributes &&
	git diff --check >output &&
	! test -s output
 
'
 
test_done