[PATCH v3 16/28] t4008: abstract away SHA-1-specific constants

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Adjust the test so that it computes variables for blobs instead of using
hard-coded hashes.

Signed-off-by: brian m. carlson <sandals@xxxxxxxxxxxxxxxxxxxx>
---
 t/t4008-diff-break-rewrite.sh | 59 +++++++++++++++++++----------------
 1 file changed, 32 insertions(+), 27 deletions(-)

diff --git a/t/t4008-diff-break-rewrite.sh b/t/t4008-diff-break-rewrite.sh
index 9dd1bc5e16..b1ccd4102e 100755
--- a/t/t4008-diff-break-rewrite.sh
+++ b/t/t4008-diff-break-rewrite.sh
@@ -27,29 +27,32 @@ Further, with -B and -M together, these should turn into two renames.
 test_expect_success setup '
 	cat "$TEST_DIRECTORY"/diff-lib/README >file0 &&
 	cat "$TEST_DIRECTORY"/diff-lib/COPYING >file1 &&
+	blob0_id=$(git hash-object file0) &&
+	blob1_id=$(git hash-object file1) &&
 	git update-index --add file0 file1 &&
 	git tag reference $(git write-tree)
 '
 
 test_expect_success 'change file1 with copy-edit of file0 and remove file0' '
 	sed -e "s/git/GIT/" file0 >file1 &&
+	blob2_id=$(git hash-object file1) &&
 	rm -f file0 &&
 	git update-index --remove file0 file1
 '
 
 test_expect_success 'run diff with -B (#1)' '
 	git diff-index -B --cached reference >current &&
-	cat >expect <<-\EOF &&
-	:100644 000000 548142c327a6790ff8821d67c2ee1eff7a656b52 0000000000000000000000000000000000000000 D	file0
-	:100644 100644 6ff87c4664981e4397625791c8ea3bbb5f2279a3 2fbedd0b5d4b8126e4750c3bee305e8ff79f80ec M100	file1
+	cat >expect <<-EOF &&
+	:100644 000000 $blob0_id $ZERO_OID D	file0
+	:100644 100644 $blob1_id $blob2_id M100	file1
 	EOF
 	compare_diff_raw expect current
 '
 
 test_expect_success 'run diff with -B and -M (#2)' '
 	git diff-index -B -M reference >current &&
-	cat >expect <<-\EOF &&
-	:100644 100644 548142c327a6790ff8821d67c2ee1eff7a656b52 2fbedd0b5d4b8126e4750c3bee305e8ff79f80ec R100	file0	file1
+	cat >expect <<-EOF &&
+	:100644 100644 $blob0_id $blob2_id R100	file0	file1
 	EOF
 	compare_diff_raw expect current
 '
@@ -66,18 +69,18 @@ test_expect_success 'swap file0 and file1' '
 
 test_expect_success 'run diff with -B (#3)' '
 	git diff-index -B reference >current &&
-	cat >expect <<-\EOF &&
-	:100644 100644 548142c327a6790ff8821d67c2ee1eff7a656b52 6ff87c4664981e4397625791c8ea3bbb5f2279a3 M100	file0
-	:100644 100644 6ff87c4664981e4397625791c8ea3bbb5f2279a3 548142c327a6790ff8821d67c2ee1eff7a656b52 M100	file1
+	cat >expect <<-EOF &&
+	:100644 100644 $blob0_id $blob1_id M100	file0
+	:100644 100644 $blob1_id $blob0_id M100	file1
 	EOF
 	compare_diff_raw expect current
 '
 
 test_expect_success 'run diff with -B and -M (#4)' '
 	git diff-index -B -M reference >current &&
-	cat >expect <<-\EOF &&
-	:100644 100644 6ff87c4664981e4397625791c8ea3bbb5f2279a3 6ff87c4664981e4397625791c8ea3bbb5f2279a3 R100	file1	file0
-	:100644 100644 548142c327a6790ff8821d67c2ee1eff7a656b52 548142c327a6790ff8821d67c2ee1eff7a656b52 R100	file0	file1
+	cat >expect <<-EOF &&
+	:100644 100644 $blob1_id $blob1_id R100	file1	file0
+	:100644 100644 $blob0_id $blob0_id R100	file0	file1
 	EOF
 	compare_diff_raw expect current
 '
@@ -85,14 +88,15 @@ test_expect_success 'run diff with -B and -M (#4)' '
 test_expect_success 'make file0 into something completely different' '
 	rm -f file0 &&
 	test_ln_s_add frotz file0 &&
+	slink_id=$(printf frotz | git hash-object --stdin) &&
 	git update-index file1
 '
 
 test_expect_success 'run diff with -B (#5)' '
 	git diff-index -B reference >current &&
-	cat >expect <<-\EOF &&
-	:100644 120000 548142c327a6790ff8821d67c2ee1eff7a656b52 67be421f88824578857624f7b3dc75e99a8a1481 T	file0
-	:100644 100644 6ff87c4664981e4397625791c8ea3bbb5f2279a3 548142c327a6790ff8821d67c2ee1eff7a656b52 M100	file1
+	cat >expect <<-EOF &&
+	:100644 120000 $blob0_id $slink_id T	file0
+	:100644 100644 $blob1_id $blob0_id M100	file1
 	EOF
 	compare_diff_raw expect current
 '
@@ -103,9 +107,9 @@ test_expect_success 'run diff with -B -M (#6)' '
 	# file0 changed from regular to symlink.  file1 is the same as the preimage
 	# of file0.  Because the change does not make file0 disappear, file1 is
 	# denoted as a copy of file0
-	cat >expect <<-\EOF &&
-	:100644 120000 548142c327a6790ff8821d67c2ee1eff7a656b52 67be421f88824578857624f7b3dc75e99a8a1481 T	file0
-	:100644 100644 548142c327a6790ff8821d67c2ee1eff7a656b52 548142c327a6790ff8821d67c2ee1eff7a656b52 C	file0	file1
+	cat >expect <<-EOF &&
+	:100644 120000 $blob0_id $slink_id T	file0
+	:100644 100644 $blob0_id $blob0_id C	file0	file1
 	EOF
 	compare_diff_raw expect current
 '
@@ -115,9 +119,9 @@ test_expect_success 'run diff with -M (#7)' '
 
 	# This should not mistake file0 as the copy source of new file1
 	# due to type differences.
-	cat >expect <<-\EOF &&
-	:100644 120000 548142c327a6790ff8821d67c2ee1eff7a656b52 67be421f88824578857624f7b3dc75e99a8a1481 T	file0
-	:100644 100644 6ff87c4664981e4397625791c8ea3bbb5f2279a3 548142c327a6790ff8821d67c2ee1eff7a656b52 M	file1
+	cat >expect <<-EOF &&
+	:100644 120000 $blob0_id $slink_id T	file0
+	:100644 100644 $blob1_id $blob0_id M	file1
 	EOF
 	compare_diff_raw expect current
 '
@@ -128,25 +132,26 @@ test_expect_success 'file1 edited to look like file0 and file0 rename-edited to
 	git checkout-index -f -u -a &&
 	sed -e "s/git/GIT/" file0 >file1 &&
 	sed -e "s/git/GET/" file0 >file2 &&
+	blob3_id=$(git hash-object file2) &&
 	rm -f file0 &&
 	git update-index --add --remove file0 file1 file2
 '
 
 test_expect_success 'run diff with -B (#8)' '
 	git diff-index -B reference >current &&
-	cat >expect <<-\EOF &&
-	:100644 000000 548142c327a6790ff8821d67c2ee1eff7a656b52 0000000000000000000000000000000000000000 D	file0
-	:100644 100644 6ff87c4664981e4397625791c8ea3bbb5f2279a3 2fbedd0b5d4b8126e4750c3bee305e8ff79f80ec M100	file1
-	:000000 100644 0000000000000000000000000000000000000000 69a939f651686f56322566e2fd76715947a24162 A	file2
+	cat >expect <<-EOF &&
+	:100644 000000 $blob0_id $ZERO_OID D	file0
+	:100644 100644 $blob1_id $blob2_id M100	file1
+	:000000 100644 $ZERO_OID $blob3_id A	file2
 	EOF
 	compare_diff_raw expect current
 '
 
 test_expect_success 'run diff with -B -C (#9)' '
 	git diff-index -B -C reference >current &&
-	cat >expect <<-\EOF &&
-	:100644 100644 548142c327a6790ff8821d67c2ee1eff7a656b52 2fbedd0b5d4b8126e4750c3bee305e8ff79f80ec C095	file0	file1
-	:100644 100644 548142c327a6790ff8821d67c2ee1eff7a656b52 69a939f651686f56322566e2fd76715947a24162 R095	file0	file2
+	cat >expect <<-EOF &&
+	:100644 100644 $blob0_id $blob2_id C095	file0	file1
+	:100644 100644 $blob0_id $blob3_id R095	file0	file2
 	EOF
 	compare_diff_raw expect current
 '



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