test_expect_success 'another test, without options' 'test_cmp expect out'
cat << EOF > expect
-diff --git a/x b/x
-index d99af23..8b32fb5 100644
EOF
git diff -w > out
test_expect_success 'another test, with -w' 'test_cmp expect out'
'
-test_expect_success 'checkdiff detects trailing blank lines' '
+test_expect_success 'checkdiff detects new trailing blank lines (1)' '
echo "foo();" >x &&
echo "" >>x &&
- git diff --check | grep "ends with blank"
+ git diff --check | grep "new blank line"
+'
+
+test_expect_success 'checkdiff detects new trailing blank lines (2)' '
+ { echo a; echo b; echo; echo; } >x &&
+ git add x &&
+ { echo a; echo; echo; echo; echo; } >x &&
+ git diff --check | grep "new blank line"
'
test_expect_success 'checkdiff allows new blank lines' '
git diff --check
'
+cat <<EOF >expect
+EOF
+test_expect_success 'whitespace-only changes not reported' '
+ git reset --hard &&
+ echo >x "hello world" &&
+ git add x &&
+ git commit -m "hello 1" &&
+ echo >x "hello world" &&
+ git diff -b >actual &&
+ test_cmp expect actual
+'
+
+cat <<EOF >expect
+diff --git a/x b/z
+similarity index NUM%
+rename from x
+rename to z
+index 380c32a..a97b785 100644
+EOF
+test_expect_success 'whitespace-only changes reported across renames' '
+ git reset --hard &&
+ for i in 1 2 3 4 5 6 7 8 9; do echo "$i$i$i$i$i$i"; done >x &&
+ git add x &&
+ git commit -m "base" &&
+ sed -e "5s/^/ /" x >z &&
+ git rm x &&
+ git add z &&
+ git diff -w -M --cached |
+ sed -e "/^similarity index /s/[0-9][0-9]*/NUM/" >actual &&
+ test_cmp expect actual
+'
+
+cat >expected <<\EOF
+diff --git a/empty b/void
+similarity index 100%
+rename from empty
+rename to void
+EOF
+
+test_expect_success 'rename empty' '
+ git reset --hard &&
+ >empty &&
+ git add empty &&
+ git commit -m empty &&
+ git mv empty void &&
+ git diff -w --cached -M >current &&
+ test_cmp expected current
+'
+
test_expect_success 'combined diff with autocrlf conversion' '
git reset --hard &&