t4207: modernize test

Before adding new tests to t4207-log-decoration-colors.sh, update the
existing test to use modern test conventions. This includes:

1. Use lowercase in test names.

2. Keep all test setup inside the test_expect_success blocks. We need
   to be careful about left whitespace in the broken lines of the input
   file.

3. Do not use 'git' commands on the left side of a pipe.

4. Create a cmp_filtered_decorations helper to perform the 'log', 'sed',
   and test_decode_color manipulations. Move the '--all' option to be an
   argument so we can change that value in future tests.

5. Modify the 'sed' command to use a simpler form that is more
   portable.

The next change will introduce new tests usinge these new conventions.

Signed-off-by: Derrick Stolee <[email protected]>
Signed-off-by: Junio C Hamano <[email protected]>

Author: derrickstolee

t/t4207-log-decoration-colors.sh

@@ -3,7 +3,7 @@
 # Copyright (c) 2010 Nazri Ramliy
 #
 
-test_description='Test for "git log --decorate" colors'
+test_description='test "git log --decorate" colors'
 
 GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=main
 export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
@@ -42,25 +42,28 @@ test_expect_success setup '
 	git stash save Changes to A.t
 '
 
-cat >expected <<EOF
-${c_commit}COMMIT_ID${c_reset}${c_commit} (${c_reset}${c_HEAD}HEAD ->\
- ${c_reset}${c_branch}main${c_reset}${c_commit},\
- ${c_reset}${c_tag}tag: v1.0${c_reset}${c_commit},\
- ${c_reset}${c_tag}tag: B${c_reset}${c_commit})${c_reset} B
-${c_commit}COMMIT_ID${c_reset}${c_commit} (${c_reset}${c_tag}tag: A1${c_reset}${c_commit},\
- ${c_reset}${c_remoteBranch}other/main${c_reset}${c_commit})${c_reset} A1
-${c_commit}COMMIT_ID${c_reset}${c_commit} (${c_reset}${c_stash}refs/stash${c_reset}${c_commit})${c_reset}\
- On main: Changes to A.t
-${c_commit}COMMIT_ID${c_reset}${c_commit} (${c_reset}${c_tag}tag: A${c_reset}${c_commit})${c_reset} A
-EOF
+cmp_filtered_decorations () {
+	sed "s/$OID_REGEX/COMMIT_ID/" actual | test_decode_color >filtered &&
+	test_cmp expect filtered
+}
 
 # We want log to show all, but the second parent to refs/stash is irrelevant
 # to this test since it does not contain any decoration, hence --first-parent
-test_expect_success 'Commit Decorations Colored Correctly' '
-	git log --first-parent --abbrev=10 --all --decorate --oneline --color=always |
-	sed "s/[0-9a-f]\{10,10\}/COMMIT_ID/" |
-	test_decode_color >out &&
-	test_cmp expected out
+test_expect_success 'commit decorations colored correctly' '
+	cat >expect <<-EOF &&
+	${c_commit}COMMIT_ID${c_reset}${c_commit} (${c_reset}${c_HEAD}HEAD -> \
+${c_reset}${c_branch}main${c_reset}${c_commit}, \
+${c_reset}${c_tag}tag: v1.0${c_reset}${c_commit}, \
+${c_reset}${c_tag}tag: B${c_reset}${c_commit})${c_reset} B
+${c_commit}COMMIT_ID${c_reset}${c_commit} (${c_reset}${c_tag}tag: A1${c_reset}${c_commit}, \
+${c_reset}${c_remoteBranch}other/main${c_reset}${c_commit})${c_reset} A1
+	${c_commit}COMMIT_ID${c_reset}${c_commit} (${c_reset}${c_stash}refs/stash${c_reset}${c_commit})${c_reset} \
+On main: Changes to A.t
+	${c_commit}COMMIT_ID${c_reset}${c_commit} (${c_reset}${c_tag}tag: A${c_reset}${c_commit})${c_reset} A
+	EOF
+
+	git log --first-parent --no-abbrev --decorate --oneline --color=always --all >actual &&
+	cmp_filtered_decorations
 '
 
 test_done