[GSoC][PATCH v4 4/5] t0000: use test_cmp instead of "test" builtin

[Jonathan Chang <ttjtftx@gmail.com>]

Signed-off-by: Jonathan Chang <ttjtftx@gmail.com>
---
 t/t0000-basic.sh | 14 ++++++++------
 1 file changed, 8 insertions(+), 6 deletions(-)

diff --git a/t/t0000-basic.sh b/t/t0000-basic.sh
index 3de13daabe..49923c5ff1 100755
--- a/t/t0000-basic.sh
+++ b/t/t0000-basic.sh
@@ -1118,16 +1118,18 @@ P=$(test_oid root)
 
 test_expect_success 'git commit-tree records the correct tree in a commit' '
 	commit0=$(echo NO | git commit-tree $P) &&
-	git show --pretty=raw $commit0 >actual &&
-	tree=$(sed -n -e "s/^tree //p" -e "/^author /q" actual) &&
-	test "z$tree" = "z$P"
+	git show --pretty=raw $commit0 >output &&
+	echo "$P" >expect &&
+	sed -n -e "s/^tree //p" -e "/^author /q" output >actual &&
+	test_cmp expect actual
 '
 
 test_expect_success 'git commit-tree records the correct parent in a commit' '
 	commit1=$(echo NO | git commit-tree $P -p $commit0) &&
-	git show --pretty=raw $commit1 >actual &&
-	parent=$(sed -n -e "s/^parent //p" -e "/^author /q" actual) &&
-	test "z$commit0" = "z$parent"
+	git show --pretty=raw $commit1 >output &&
+	echo "$commit0" >expect &&
+	sed -n -e "s/^parent //p" -e "/^author /q" output >actual &&
+	test_cmp expect actual
 '
 
 test_expect_success 'git commit-tree omits duplicated parent in a commit' '
-- 
2.21.0