t/t3701-add-interactive.sh: change from skip_all=* to prereq skip

Change this test to skip test with test prerequisites, and to do setup
work in tests. This improves the skipped statistics on platforms where
the test isn't run.

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

t/t3701-add-interactive.sh

@@ -4,21 +4,18 @@ test_description='add -i basic tests'
 . ./test-lib.sh
 . "$TEST_DIRECTORY"/lib-prereq-FILEMODE.sh
 
-if ! test_have_prereq PERL; then
-	skip_all='skipping git add -i tests, perl not available'
-	test_done
-fi
-
-test_expect_success 'setup (initial)' '
+test_expect_success PERL 'setup (initial)' '
 	echo content >file &&
 	git add file &&
 	echo more >>file &&
 	echo lines >>file
 '
-test_expect_success 'status works (initial)' '
+test_expect_success PERL 'status works (initial)' '
 	git add -i </dev/null >output &&
 	grep "+1/-0 *+2/-0 file" output
 '
+
+test_expect_success PERL 'setup expected' '
 cat >expected <<EOF
 new file mode 100644
 index 0000000..d95f3ad
@@ -27,19 +24,21 @@ index 0000000..d95f3ad
 @@ -0,0 +1 @@
 +content
 EOF
-test_expect_success 'diff works (initial)' '
+'
+
+test_expect_success PERL 'diff works (initial)' '
 	(echo d; echo 1) | git add -i >output &&
 	sed -ne "/new file/,/content/p" <output >diff &&
 	test_cmp expected diff
 '
-test_expect_success 'revert works (initial)' '
+test_expect_success PERL 'revert works (initial)' '
 	git add file &&
 	(echo r; echo 1) | git add -i &&
 	git ls-files >output &&
 	! grep . output
 '
 
-test_expect_success 'setup (commit)' '
+test_expect_success PERL 'setup (commit)' '
 	echo baseline >file &&
 	git add file &&
 	git commit -m commit &&
@@ -48,10 +47,12 @@ test_expect_success 'setup (commit)' '
 	echo more >>file &&
 	echo lines >>file
 '
-test_expect_success 'status works (commit)' '
+test_expect_success PERL 'status works (commit)' '
 	git add -i </dev/null >output &&
 	grep "+1/-0 *+2/-0 file" output
 '
+
+test_expect_success PERL 'setup expected' '
 cat >expected <<EOF
 index 180b47c..b6f2c08 100644
 --- a/file
@@ -60,60 +61,79 @@ index 180b47c..b6f2c08 100644
  baseline
 +content
 EOF
-test_expect_success 'diff works (commit)' '
+'
+
+test_expect_success PERL 'diff works (commit)' '
 	(echo d; echo 1) | git add -i >output &&
 	sed -ne "/^index/,/content/p" <output >diff &&
 	test_cmp expected diff
 '
-test_expect_success 'revert works (commit)' '
+test_expect_success PERL 'revert works (commit)' '
 	git add file &&
 	(echo r; echo 1) | git add -i &&
 	git add -i </dev/null >output &&
 	grep "unchanged *+3/-0 file" output
 '
 
+
+test_expect_success PERL 'setup expected' '
 cat >expected <<EOF
 EOF
-cat >fake_editor.sh <<EOF
-EOF
-chmod a+x fake_editor.sh
-test_set_editor "$(pwd)/fake_editor.sh"
-test_expect_success 'dummy edit works' '
+'
+
+test_expect_success PERL 'setup fake editor' '
+	cat >fake_editor.sh <<EOF
+	EOF
+	chmod a+x fake_editor.sh &&
+	test_set_editor "$(pwd)/fake_editor.sh" &&
+'
+
+test_expect_success PERL 'dummy edit works' '
 	(echo e; echo a) | git add -p &&
 	git diff > diff &&
 	test_cmp expected diff
 '
 
+test_expect_success PERL 'setup patch' '
 cat >patch <<EOF
 @@ -1,1 +1,4 @@
  this
 +patch
--doesn't
+-does not
  apply
 EOF
-echo "#!$SHELL_PATH" >fake_editor.sh
-cat >>fake_editor.sh <<\EOF
+'
+
+test_expect_success PERL 'setup fake editor' '
+	echo "#!$SHELL_PATH" >fake_editor.sh &&
+	cat >>fake_editor.sh <<\EOF &&
 mv -f "$1" oldpatch &&
 mv -f patch "$1"
 EOF
-chmod a+x fake_editor.sh
-test_set_editor "$(pwd)/fake_editor.sh"
-test_expect_success 'bad edit rejected' '
+	chmod a+x fake_editor.sh &&
+	test_set_editor "$(pwd)/fake_editor.sh"
+'
+
+test_expect_success PERL 'bad edit rejected' '
 	git reset &&
 	(echo e; echo n; echo d) | git add -p >output &&
 	grep "hunk does not apply" output
 '
 
+test_expect_success PERL 'setup patch' '
 cat >patch <<EOF
 this patch
 is garbage
 EOF
-test_expect_success 'garbage edit rejected' '
+'
+
+test_expect_success PERL 'garbage edit rejected' '
 	git reset &&
 	(echo e; echo n; echo d) | git add -p >output &&
 	grep "hunk does not apply" output
 '
 
+test_expect_success PERL 'setup patch' '
 cat >patch <<EOF
 @@ -1,0 +1,0 @@
  baseline
@@ -121,6 +141,9 @@ cat >patch <<EOF
 +newcontent
 +lines
 EOF
+'
+
+test_expect_success PERL 'setup expected' '
 cat >expected <<EOF
 diff --git a/file b/file
 index b5dd6c9..f910ae9 100644
@@ -133,13 +156,15 @@ index b5dd6c9..f910ae9 100644
 +more
  lines
 EOF
-test_expect_success 'real edit works' '
+'
+
+test_expect_success PERL 'real edit works' '
 	(echo e; echo n; echo d) | git add -p &&
 	git diff >output &&
 	test_cmp expected output
 '
 
-test_expect_success 'skip files similarly as commit -a' '
+test_expect_success PERL 'skip files similarly as commit -a' '
 	git reset &&
 	echo file >.gitignore &&
 	echo changed >file &&
@@ -153,7 +178,7 @@ test_expect_success 'skip files similarly as commit -a' '
 '
 rm -f .gitignore
 
-test_expect_success FILEMODE 'patch does not affect mode' '
+test_expect_success PERL,FILEMODE 'patch does not affect mode' '
 	git reset --hard &&
 	echo content >>file &&
 	chmod +x file &&
@@ -162,7 +187,7 @@ test_expect_success FILEMODE 'patch does not affect mode' '
 	git diff file | grep "new mode"
 '
 
-test_expect_success FILEMODE 'stage mode but not hunk' '
+test_expect_success PERL,FILEMODE 'stage mode but not hunk' '
 	git reset --hard &&
 	echo content >>file &&
 	chmod +x file &&
@@ -172,7 +197,7 @@ test_expect_success FILEMODE 'stage mode but not hunk' '
 '
 
 
-test_expect_success FILEMODE 'stage mode and hunk' '
+test_expect_success PERL,FILEMODE 'stage mode and hunk' '
 	git reset --hard &&
 	echo content >>file &&
 	chmod +x file &&
@@ -184,13 +209,14 @@ test_expect_success FILEMODE 'stage mode and hunk' '
 
 # end of tests disabled when filemode is not usable
 
-test_expect_success 'setup again' '
+test_expect_success PERL 'setup again' '
 	git reset --hard &&
 	test_chmod +x file &&
 	echo content >>file
 '
 
 # Write the patch file with a new line at the top and bottom
+test_expect_success PERL 'setup patch' '
 cat >patch <<EOF
 index 180b47c..b6f2c08 100644
 --- a/file
@@ -201,7 +227,10 @@ index 180b47c..b6f2c08 100644
  content
 +lastline
 EOF
+'
+
 # Expected output, similar to the patch but w/ diff at the top
+test_expect_success PERL 'setup expected' '
 cat >expected <<EOF
 diff --git a/file b/file
 index b6f2c08..61b9053 100755
@@ -213,8 +242,10 @@ index b6f2c08..61b9053 100755
  content
 +lastline
 EOF
+'
+
 # Test splitting the first patch, then adding both
-test_expect_success 'add first line works' '
+test_expect_success PERL 'add first line works' '
 	git commit -am "clear local changes" &&
 	git apply patch &&
 	(echo s; echo y; echo y) | git add -p file &&
@@ -222,6 +253,7 @@ test_expect_success 'add first line works' '
 	test_cmp expected diff
 '
 
+test_expect_success PERL 'setup expected' '
 cat >expected <<EOF
 diff --git a/non-empty b/non-empty
 deleted file mode 100644
@@ -231,7 +263,9 @@ index d95f3ad..0000000
 @@ -1 +0,0 @@
 -content
 EOF
-test_expect_success 'deleting a non-empty file' '
+'
+
+test_expect_success PERL 'deleting a non-empty file' '
 	git reset --hard &&
 	echo content >non-empty &&
 	git add non-empty &&
@@ -242,13 +276,15 @@ test_expect_success 'deleting a non-empty file' '
 	test_cmp expected diff
 '
 
+test_expect_success PERL 'setup expected' '
 cat >expected <<EOF
 diff --git a/empty b/empty
 deleted file mode 100644
 index e69de29..0000000
 EOF
+'
 
-test_expect_success 'deleting an empty file' '
+test_expect_success PERL 'deleting an empty file' '
 	git reset --hard &&
 	> empty &&
 	git add empty &&