t6302: simplify non-gpg cases

When commit 618310a taught t6302 to run without the GPG
prerequisite, it did so by conditionally creating the signed
tags only when gpg is available. As a result, further tests
need to take this into account, which they can do with the
test_prepare_expect helper. This is a minor hassle, though,
as the helper cannot easily cover all cases (it just matches
"signed" in the output, so all output must include the
actual refname).

Instead, let's take a different approach. We'll always
create the tags, and only conditionally sign them. This does
mean our tag-names are a minor lie, but it lets the tests
which do not care about signing easily behave the same in
all settings. We'll include a comment to document our lie
and avoid confusing further test-writers.

Signed-off-by: Jeff King <peff@peff.net>
Reviewed-by: Eric Sunshine <sunshine@sunshineco.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

t/t6302-for-each-ref-filter.sh

@@ -5,15 +5,6 @@ test_description='test for-each-refs usage of ref-filter APIs'
 . ./test-lib.sh
 . "$TEST_DIRECTORY"/lib-gpg.sh
 
-test_prepare_expect () {
-	if test_have_prereq GPG
-	then
-		cat
-	else
-		sed '/signed/d'
-	fi
-}
-
 test_expect_success 'setup some history and refs' '
 	test_commit one &&
 	test_commit two &&
@@ -22,11 +13,19 @@ test_expect_success 'setup some history and refs' '
 	test_commit four &&
 	git tag -m "An annotated tag" annotated-tag &&
 	git tag -m "Annonated doubly" doubly-annotated-tag annotated-tag &&
+
+	# Note that these "signed" tags might not actually be signed.
+	# Tests which care about the distinction should be marked
+	# with the GPG prereq.
 	if test_have_prereq GPG
 	then
-		git tag -s -m "A signed tag" signed-tag &&
+		sign=-s
-		git tag -s -m "Signed doubly" doubly-signed-tag signed-tag
+	else
+		sign=
 	fi &&
+	git tag $sign -m "A signed tag" signed-tag &&
+	git tag $sign -m "Signed doubly" doubly-signed-tag signed-tag &&
+
 	git checkout master &&
 	git update-ref refs/odd/spot master
 '
@@ -42,7 +41,7 @@ test_expect_success 'filtering with --points-at' '
 '
 
 test_expect_success 'check signed tags with --points-at' '
-	test_prepare_expect <<-\EOF | sed -e "s/Z$//" >expect &&
+	sed -e "s/Z$//" >expect <<-\EOF &&
 	refs/heads/side Z
 	refs/tags/annotated-tag four
 	refs/tags/four Z
@@ -65,7 +64,7 @@ test_expect_success 'filtering with --merged' '
 '
 
 test_expect_success 'filtering with --no-merged' '
-	test_prepare_expect >expect <<-\EOF &&
+	cat >expect <<-\EOF &&
 	refs/heads/side
 	refs/tags/annotated-tag
 	refs/tags/doubly-annotated-tag
@@ -78,7 +77,7 @@ test_expect_success 'filtering with --no-merged' '
 '
 
 test_expect_success 'filtering with --contains' '
-	test_prepare_expect >expect <<-\EOF &&
+	cat >expect <<-\EOF &&
 	refs/heads/master
 	refs/heads/side
 	refs/odd/spot
@@ -99,7 +98,7 @@ test_expect_success '%(color) must fail' '
 '
 
 test_expect_success 'left alignment is default' '
-	test_prepare_expect >expect <<-\EOF &&
+	cat >expect <<-\EOF &&
 	refname is refs/heads/master  |refs/heads/master
 	refname is refs/heads/side    |refs/heads/side
 	refname is refs/odd/spot      |refs/odd/spot
@@ -117,7 +116,7 @@ test_expect_success 'left alignment is default' '
 '
 
 test_expect_success 'middle alignment' '
-	test_prepare_expect >expect <<-\EOF &&
+	cat >expect <<-\EOF &&
 	| refname is refs/heads/master |refs/heads/master
 	|  refname is refs/heads/side  |refs/heads/side
 	|   refname is refs/odd/spot   |refs/odd/spot
@@ -135,7 +134,7 @@ test_expect_success 'middle alignment' '
 '
 
 test_expect_success 'right alignment' '
-	test_prepare_expect >expect <<-\EOF &&
+	cat >expect <<-\EOF &&
 	|  refname is refs/heads/master|refs/heads/master
 	|    refname is refs/heads/side|refs/heads/side
 	|      refname is refs/odd/spot|refs/odd/spot
@@ -152,7 +151,7 @@ test_expect_success 'right alignment' '
 	test_cmp expect actual
 '
 
-test_prepare_expect >expect <<-\EOF
+cat >expect <<-\EOF
 |       refname is refs/heads/master       |refs/heads/master
 |        refname is refs/heads/side        |refs/heads/side
 |         refname is refs/odd/spot         |refs/odd/spot
@@ -199,7 +198,7 @@ EOF
 # Individual atoms inside %(align:...) and %(end) must not be quoted.
 
 test_expect_success 'alignment with format quote' "
-	test_prepare_expect >expect <<-\EOF &&
+	cat >expect <<-\EOF &&
 	|'      '\''master| A U Thor'\''      '|
 	|'       '\''side| A U Thor'\''       '|
 	|'     '\''odd/spot| A U Thor'\''     '|
@@ -217,7 +216,7 @@ test_expect_success 'alignment with format quote' "
 "
 
 test_expect_success 'nested alignment with quote formatting' "
-	test_prepare_expect >expect <<-\EOF &&
+	cat >expect <<-\EOF &&
 	|'         master               '|
 	|'           side               '|
 	|'       odd/spot               '|
@@ -235,7 +234,7 @@ test_expect_success 'nested alignment with quote formatting' "
 "
 
 test_expect_success 'check `%(contents:lines=1)`' '
-	test_prepare_expect >expect <<-\EOF &&
+	cat >expect <<-\EOF &&
 	master |three
 	side |four
 	odd/spot |three
@@ -253,7 +252,7 @@ test_expect_success 'check `%(contents:lines=1)`' '
 '
 
 test_expect_success 'check `%(contents:lines=0)`' '
-	test_prepare_expect >expect <<-\EOF &&
+	cat >expect <<-\EOF &&
 	master |
 	side |
 	odd/spot |
@@ -271,7 +270,7 @@ test_expect_success 'check `%(contents:lines=0)`' '
 '
 
 test_expect_success 'check `%(contents:lines=99999)`' '
-	test_prepare_expect >expect <<-\EOF &&
+	cat >expect <<-\EOF &&
 	master |three
 	side |four
 	odd/spot |three