[PATCH 05/20] abbrev tests: test "git-blame" behavior

[Ævar Arnfjörð Bjarmason]

Add tests showing how "git-blame" behaves. As noted in an earlier
change there's a behavior difference between core.abbrev=40 and
--abbrev=40.

Let's also assert that neither way of changing the abbreviation length
modifies the porcelain output.

Signed-off-by: Ævar Arnfjörð Bjarmason <ava...@gmail.com>
---
 t/t0014-abbrev.sh | 48 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 48 insertions(+)

diff --git a/t/t0014-abbrev.sh b/t/t0014-abbrev.sh
index 1c60f5ff93..77f15d5b0b 100755
--- a/t/t0014-abbrev.sh
+++ b/t/t0014-abbrev.sh
@@ -12,6 +12,10 @@ cut_tr_d_n_field_n() {
        cut -d " " -f $1 | tr_d_n
 }
 
+nocaret() {
+       sed 's/\^//'
+}
+
 test_expect_success 'setup' '
        test_commit A &&
        git tag -a -mannotated A.annotated &&
@@ -115,4 +119,48 @@ do
        "
 done
 
+for i in $(test_seq 4 40)
+do
+       for opt in --porcelain --line-porcelain
+       do
+               test_expect_success "blame $opt ignores core.abbrev=$i and 
--abbrev=$i" "
+                       git -c core.abbrev=$i blame $opt A.t | head -n 1 | 
cut_tr_d_n_field_n 1 >blame &&
+                       test_byte_count = 40 blame &&
+                       git blame $opt --abbrev=$i A.t | head -n 1 | 
cut_tr_d_n_field_n 1 >blame &&
+                       test_byte_count = 40 blame
+               "
+       done
+
+
+       test_expect_success "blame core.abbrev=$i and --abbrev=$i with 
boundary" "
+               # See the blame documentation for why this is off-by-one
+               git -c core.abbrev=$i blame A.t | cut_tr_d_n_field_n 1 | 
nocaret >blame &&
+               test_byte_count = $i blame &&
+               git blame --abbrev=$i A.t | cut_tr_d_n_field_n 1 | nocaret 
>blame &&
+               if test $i -eq 40
+               then
+                       test_byte_count = 39 blame
+               else
+                       test_byte_count = $i blame
+               fi
+       "
+
+       test_expect_success "blame core.abbrev=$i and --abbrev=$i without 
boundary" "
+               git -c core.abbrev=$i blame B.t | cut_tr_d_n_field_n 1 | 
nocaret >blame &&
+               if test $i -eq 40
+               then
+                       test_byte_count = $i blame
+               else
+                       test_byte_count = \$(($i + 1)) blame
+               fi &&
+               git blame --abbrev=$i B.t | cut_tr_d_n_field_n 1 | nocaret 
>blame &&
+               if test $i -eq 40
+               then
+                       test_byte_count = $i blame
+               else
+                       test_byte_count = \$(($i + 1)) blame
+               fi
+       "
+done
+
 test_done
-- 
2.17.0.290.gded63e768a