tests: make use of the test_must_be_empty function

diff --git a/t/t4015-diff-whitespace.sh b/t/t4015-diff-whitespace.sh
index 17df491a3abe84fca63bb899d1162832d13e1847..5659c2612da5a63ba48e6651ef25e8c549f2c954 100755 (executable)
--- a/t/t4015-diff-whitespace.sh
+++ b/t/t4015-diff-whitespace.sh
@@ -93,21 +93,20 @@ test_expect_success 'another test, without options' '
        git diff >out &&
        test_cmp expect out &&
 
-       >expect &&
        git diff -w >out &&
-       test_cmp expect out &&
+       test_must_be_empty out &&
 
        git diff -w -b >out &&
-       test_cmp expect out &&
+       test_must_be_empty out &&
 
        git diff -w --ignore-space-at-eol >out &&
-       test_cmp expect out &&
+       test_must_be_empty out &&
 
        git diff -w -b --ignore-space-at-eol >out &&
-       test_cmp expect out &&
+       test_must_be_empty out &&
 
        git diff -w --ignore-cr-at-eol >out &&
-       test_cmp expect out &&
+       test_must_be_empty out &&
 
        tr "Q_" "\015 " <<-\EOF >expect &&
        diff --git a/x b/x
@@ -182,8 +181,7 @@ test_expect_success 'ignore-blank-lines: only new lines' '
        test_seq 5 | sed "/3/i\\
 " >x &&
        git diff --ignore-blank-lines >out &&
-       >expect &&
-       test_cmp expect out
+       test_must_be_empty out
 '
 
 test_expect_success 'ignore-blank-lines: only new lines with space' '
@@ -192,8 +190,7 @@ test_expect_success 'ignore-blank-lines: only new lines with space' '
        test_seq 5 | sed "/3/i\\
  " >x &&
        git diff -w --ignore-blank-lines >out &&
-       >expect &&
-       test_cmp expect out
+       test_must_be_empty out
 '
 
 test_expect_success 'ignore-blank-lines: after change' '