untracked-cache: be defensive about missing NULs in index

diff --git a/t/t4027-diff-submodule.sh b/t/t4027-diff-submodule.sh
index 6304130ad4737bfac1e2cf06fd8c600bb7b42f76..9aa8e2b39b45a6c2b5ec48a9d98b94831edb2caa 100755 (executable)
--- a/t/t4027-diff-submodule.sh
+++ b/t/t4027-diff-submodule.sh
@@ -104,19 +104,19 @@ test_expect_success 'git diff HEAD with dirty submodule (work tree, refs match)'
        expect_from_to >expect.body $subprev $subprev-dirty &&
        test_cmp expect.body actual.body &&
        git diff --ignore-submodules HEAD >actual2 &&
-       ! test -s actual2 &&
+       test_must_be_empty actual2 &&
        git diff --ignore-submodules=untracked HEAD >actual3 &&
        sed -e "1,/^@@/d" actual3 >actual3.body &&
        expect_from_to >expect.body $subprev $subprev-dirty &&
        test_cmp expect.body actual3.body &&
        git diff --ignore-submodules=dirty HEAD >actual4 &&
-       ! test -s actual4
+       test_must_be_empty actual4
 '
 
 test_expect_success 'git diff HEAD with dirty submodule (work tree, refs match) [.gitmodules]' '
        git config diff.ignoreSubmodules dirty &&
        git diff HEAD >actual &&
-       ! test -s actual &&
+       test_must_be_empty actual &&
        git config --add -f .gitmodules submodule.subname.ignore none &&
        git config --add -f .gitmodules submodule.subname.path sub &&
        git diff HEAD >actual &&
@@ -126,7 +126,7 @@ test_expect_success 'git diff HEAD with dirty submodule (work tree, refs match)
        git config -f .gitmodules submodule.subname.ignore all &&
        git config -f .gitmodules submodule.subname.path sub &&
        git diff HEAD >actual2 &&
-       ! test -s actual2 &&
+       test_must_be_empty actual2 &&
        git config -f .gitmodules submodule.subname.ignore untracked &&
        git diff HEAD >actual3 &&
        sed -e "1,/^@@/d" actual3 >actual3.body &&
@@ -134,7 +134,7 @@ test_expect_success 'git diff HEAD with dirty submodule (work tree, refs match)
        test_cmp expect.body actual3.body &&
        git config -f .gitmodules submodule.subname.ignore dirty &&
        git diff HEAD >actual4 &&
-       ! test -s actual4 &&
+       test_must_be_empty actual4 &&
        git config submodule.subname.ignore none &&
        git config submodule.subname.path sub &&
        git diff HEAD >actual &&
@@ -172,24 +172,24 @@ test_expect_success 'git diff HEAD with dirty submodule (untracked, refs match)'
        expect_from_to >expect.body $subprev $subprev-dirty &&
        test_cmp expect.body actual.body &&
        git diff --ignore-submodules=all HEAD >actual2 &&
-       ! test -s actual2 &&
+       test_must_be_empty actual2 &&
        git diff --ignore-submodules=untracked HEAD >actual3 &&
-       ! test -s actual3 &&
+       test_must_be_empty actual3 &&
        git diff --ignore-submodules=dirty HEAD >actual4 &&
-       ! test -s actual4
+       test_must_be_empty actual4
 '
 
 test_expect_success 'git diff HEAD with dirty submodule (untracked, refs match) [.gitmodules]' '
        git config --add -f .gitmodules submodule.subname.ignore all &&
        git config --add -f .gitmodules submodule.subname.path sub &&
        git diff HEAD >actual2 &&
-       ! test -s actual2 &&
+       test_must_be_empty actual2 &&
        git config -f .gitmodules submodule.subname.ignore untracked &&
        git diff HEAD >actual3 &&
-       ! test -s actual3 &&
+       test_must_be_empty actual3 &&
        git config -f .gitmodules submodule.subname.ignore dirty &&
        git diff HEAD >actual4 &&
-       ! test -s actual4 &&
+       test_must_be_empty actual4 &&
        git config submodule.subname.ignore none &&
        git config submodule.subname.path sub &&
        git diff HEAD >actual &&
@@ -211,7 +211,7 @@ test_expect_success 'git diff between submodule commits' '
        expect_from_to >expect.body $subtip $subprev &&
        test_cmp expect.body actual.body &&
        git diff --ignore-submodules HEAD^..HEAD >actual &&
-       ! test -s actual
+       test_must_be_empty actual
 '
 
 test_expect_success 'git diff between submodule commits [.gitmodules]' '
@@ -227,7 +227,7 @@ test_expect_success 'git diff between submodule commits [.gitmodules]' '
        test_cmp expect.body actual.body &&
        git config -f .gitmodules submodule.subname.ignore all &&
        git diff HEAD^..HEAD >actual &&
-       ! test -s actual &&
+       test_must_be_empty actual &&
        git config submodule.subname.ignore dirty &&
        git config submodule.subname.path sub &&
        git diff  HEAD^..HEAD >actual &&
@@ -239,10 +239,9 @@ test_expect_success 'git diff between submodule commits [.gitmodules]' '
 '
 
 test_expect_success 'git diff (empty submodule dir)' '
-       : >empty &&
        rm -rf sub/* sub/.git &&
        git diff > actual.empty &&
-       test_cmp empty actual.empty
+       test_must_be_empty actual.empty
 '
 
 test_expect_success 'conflicted submodule setup' '