docs/diff-options: clarify scope of diff-filter types

diff --git a/t/t1300-repo-config.sh b/t/t1300-repo-config.sh
index 923bfc5a2606588f30bebbcfd4c34788976c354c..ea371020fa6670cd275da67ea06ed6ca09f869e9 100755 (executable)
--- a/t/t1300-repo-config.sh
+++ b/t/t1300-repo-config.sh
@@ -1097,6 +1097,68 @@ test_expect_success 'multiple git -c appends config' '
        test_cmp expect actual
 '
 
+test_expect_success 'last one wins: two level vars' '
+
+       # sec.var and sec.VAR are the same variable, as the first
+       # and the last level of a configuration variable name is
+       # case insensitive.
+
+       echo VAL >expect &&
+
+       git -c sec.var=val -c sec.VAR=VAL config --get sec.var >actual &&
+       test_cmp expect actual &&
+       git -c SEC.var=val -c sec.var=VAL config --get sec.var >actual &&
+       test_cmp expect actual &&
+
+       git -c sec.var=val -c sec.VAR=VAL config --get SEC.var >actual &&
+       test_cmp expect actual &&
+       git -c SEC.var=val -c sec.var=VAL config --get sec.VAR >actual &&
+       test_cmp expect actual
+'
+
+test_expect_success 'last one wins: three level vars' '
+
+       # v.a.r and v.A.r are not the same variable, as the middle
+       # level of a three-level configuration variable name is
+       # case sensitive.
+
+       echo val >expect &&
+       git -c v.a.r=val -c v.A.r=VAL config --get v.a.r >actual &&
+       test_cmp expect actual &&
+       git -c v.a.r=val -c v.A.r=VAL config --get V.a.R >actual &&
+       test_cmp expect actual &&
+
+       # v.a.r and V.a.R are the same variable, as the first
+       # and the last level of a configuration variable name is
+       # case insensitive.
+
+       echo VAL >expect &&
+       git -c v.a.r=val -c v.a.R=VAL config --get v.a.r >actual &&
+       test_cmp expect actual &&
+       git -c v.a.r=val -c V.a.r=VAL config --get v.a.r >actual &&
+       test_cmp expect actual &&
+       git -c v.a.r=val -c v.a.R=VAL config --get V.a.R >actual &&
+       test_cmp expect actual &&
+       git -c v.a.r=val -c V.a.r=VAL config --get V.a.R >actual &&
+       test_cmp expect actual
+'
+
+for VAR in a .a a. a.0b a."b c". a."b c".0d
+do
+       test_expect_success "git -c $VAR=VAL rejects invalid '$VAR'" '
+               test_must_fail git -c "$VAR=VAL" config -l
+       '
+done
+
+for VAR in a.b a."b c".d
+do
+       test_expect_success "git -c $VAR=VAL works with valid '$VAR'" '
+               echo VAL >expect &&
+               git -c "$VAR=VAL" config --get "$VAR" >actual &&
+               test_cmp expect actual
+       '
+done
+
 test_expect_success 'git -c is not confused by empty environment' '
        GIT_CONFIG_PARAMETERS="" git -c x.one=1 config --list
 '