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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 "No problem" >>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 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 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 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 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 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 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 No normal >/dev/null
+
+'
+
+test_done