tests: document cherry-pick behavior in face of conflicts

diff --git a/t/t4015-diff-whitespace.sh b/t/t4015-diff-whitespace.sh
index 6d13da30dad5a78fb17a01e86ef33072ea9e6250..90f33423731a84310caf92780482a44f8d2f32d8 100755 (executable)
--- a/t/t4015-diff-whitespace.sh
+++ b/t/t4015-diff-whitespace.sh
@@ -93,8 +93,6 @@ git diff > out
 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'
@@ -362,10 +360,17 @@ test_expect_success 'line numbers in --check output are correct' '
 
 '
 
-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' '
@@ -379,6 +384,18 @@ 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
+'
+
 test_expect_success 'combined diff with autocrlf conversion' '
 
        git reset --hard &&