test_i18ncmp expect stdout
'
+test_expect_success 'no advice given for explicit detached head state' '
+ # baseline
+ test_config advice.detachedHead true &&
+ git checkout child && git checkout HEAD^0 >expect.advice 2>&1 &&
+ test_config advice.detachedHead false &&
+ git checkout child && git checkout HEAD^0 >expect.no-advice 2>&1 &&
+ test_unconfig advice.detachedHead &&
+ # without configuration, the advice.* variables default to true
+ git checkout child && git checkout HEAD^0 >actual 2>&1 &&
+ test_cmp expect.advice actual &&
+
+ # with explicit --detach
+ # no configuration
+ test_unconfig advice.detachedHead &&
+ git checkout child && git checkout --detach HEAD^0 >actual 2>&1 &&
+ test_cmp expect.no-advice actual &&
+
+ # explicitly decline advice
+ test_config advice.detachedHead false &&
+ git checkout child && git checkout --detach HEAD^0 >actual 2>&1 &&
+ test_cmp expect.no-advice actual
+'
+
+# Detached HEAD tests for GIT_PRINT_SHA1_ELLIPSIS (new format)
+test_expect_success 'describe_detached_head prints no SHA-1 ellipsis when not asked to' "
+
+ # The first detach operation is more chatty than the following ones.
+ cat >1st_detach <<-'EOF' &&
+ Note: checking out 'HEAD^'.
+
+ You are in 'detached HEAD' state. You can look around, make experimental
+ changes and commit them, and you can discard any commits you make in this
+ state without impacting any branches by performing another checkout.
+
+ If you want to create a new branch to retain commits you create, you may
+ do so (now or later) by using -b with the checkout command again. Example:
+
+ git checkout -b <new-branch-name>
+
+ HEAD is now at 7c7cd714e262 three
+ EOF
+
+ # The remaining ones just show info about previous and current HEADs.
+ cat >2nd_detach <<-'EOF' &&
+ Previous HEAD position was 7c7cd714e262 three
+ HEAD is now at 139b20d8e6c5 two
+ EOF
+
+ cat >3rd_detach <<-'EOF' &&
+ Previous HEAD position was 139b20d8e6c5 two
+ HEAD is now at d79ce1670bdc one
+ EOF
+
+ reset &&
+ check_not_detached &&
+
+ # Various ways of *not* asking for ellipses
+
+ sane_unset GIT_PRINT_SHA1_ELLIPSIS &&
+ git -c 'core.abbrev=12' checkout HEAD^ >actual 2>&1 &&
+ check_detached &&
+ test_i18ncmp 1st_detach actual &&
+
+ GIT_PRINT_SHA1_ELLIPSIS="no" git -c 'core.abbrev=12' checkout HEAD^ >actual 2>&1 &&
+ check_detached &&
+ test_i18ncmp 2nd_detach actual &&
+
+ GIT_PRINT_SHA1_ELLIPSIS= git -c 'core.abbrev=12' checkout HEAD^ >actual 2>&1 &&
+ check_detached &&
+ test_i18ncmp 3rd_detach actual &&
+
+ sane_unset GIT_PRINT_SHA1_ELLIPSIS &&
+
+ # We only have four commits, but we can re-use them
+ reset &&
+ check_not_detached &&
+
+ # Make no mention of the env var at all
+ git -c 'core.abbrev=12' checkout HEAD^ >actual 2>&1 &&
+ check_detached &&
+ test_i18ncmp 1st_detach actual &&
+
+ GIT_PRINT_SHA1_ELLIPSIS='nope' &&
+ git -c 'core.abbrev=12' checkout HEAD^ >actual 2>&1 &&
+ check_detached &&
+ test_i18ncmp 2nd_detach actual &&
+
+ GIT_PRINT_SHA1_ELLIPSIS=nein &&
+ git -c 'core.abbrev=12' checkout HEAD^ >actual 2>&1 &&
+ check_detached &&
+ test_i18ncmp 3rd_detach actual &&
+
+ true
+"
+
+# Detached HEAD tests for GIT_PRINT_SHA1_ELLIPSIS (old format)
+test_expect_success 'describe_detached_head does print SHA-1 ellipsis when asked to' "
+
+ # The first detach operation is more chatty than the following ones.
+ cat >1st_detach <<-'EOF' &&
+ Note: checking out 'HEAD^'.
+
+ You are in 'detached HEAD' state. You can look around, make experimental
+ changes and commit them, and you can discard any commits you make in this
+ state without impacting any branches by performing another checkout.
+
+ If you want to create a new branch to retain commits you create, you may
+ do so (now or later) by using -b with the checkout command again. Example:
+
+ git checkout -b <new-branch-name>
+
+ HEAD is now at 7c7cd714e262... three
+ EOF
+
+ # The remaining ones just show info about previous and current HEADs.
+ cat >2nd_detach <<-'EOF' &&
+ Previous HEAD position was 7c7cd714e262... three
+ HEAD is now at 139b20d8e6c5... two
+ EOF
+
+ cat >3rd_detach <<-'EOF' &&
+ Previous HEAD position was 139b20d8e6c5... two
+ HEAD is now at d79ce1670bdc... one
+ EOF
+
+ reset &&
+ check_not_detached &&
+
+ # Various ways of asking for ellipses...
+ # The user can just use any kind of quoting (including none).
+
+ GIT_PRINT_SHA1_ELLIPSIS=yes git -c 'core.abbrev=12' checkout HEAD^ >actual 2>&1 &&
+ check_detached &&
+ test_i18ncmp 1st_detach actual &&
+
+ GIT_PRINT_SHA1_ELLIPSIS=Yes git -c 'core.abbrev=12' checkout HEAD^ >actual 2>&1 &&
+ check_detached &&
+ test_i18ncmp 2nd_detach actual &&
+
+ GIT_PRINT_SHA1_ELLIPSIS=YES git -c 'core.abbrev=12' checkout HEAD^ >actual 2>&1 &&
+ check_detached &&
+ test_i18ncmp 3rd_detach actual &&
+
+ true
+"
+
test_done