[PATCH 2/9] t7601: add tests of interactions with multiple merge heads and config

["Elijah Newren via GitGitGadget" <gitgitgadget@gmail.com>]

From: Elijah Newren <newren@gmail.com>

There were already code checking that --rebase was incompatible with
a merge of multiple heads.  However, we were sometimes throwing warnings
about lack of specification of rebase vs. merge when given multiple
heads.  Since rebasing is disallowed with multiple merge heads, that
seems like a poor warning to print; we should instead just assume
merging is wanted.

Add a few tests checking multiple merge head behavior.

Signed-off-by: Elijah Newren <newren@gmail.com>
---
 t/t7601-merge-pull-config.sh | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/t/t7601-merge-pull-config.sh b/t/t7601-merge-pull-config.sh
index b24c98cc1b6..40d8fb95113 100755
--- a/t/t7601-merge-pull-config.sh
+++ b/t/t7601-merge-pull-config.sh
@@ -297,6 +297,26 @@ test_expect_success 'pull.rebase=true takes precedence over --ff' '
 
 # End of precedence rules
 
+test_expect_failure 'Multiple heads does not warn about fast forwarding' '
+	git reset --hard c1 &&
+	git pull . c2 c3 2>err &&
+	test_i18ngrep ! "Pulling without specifying how to reconcile" err
+'
+
+test_expect_success 'Cannot fast-forward with multiple heads' '
+	git reset --hard c0 &&
+	test_must_fail git -c pull.ff=only pull . c1 c2 c3 2>err &&
+	test_i18ngrep ! "Pulling without specifying how to reconcile" err &&
+	test_i18ngrep "Not possible to fast-forward, aborting" err
+'
+
+test_expect_success 'Cannot rebase with multiple heads' '
+	git reset --hard c0 &&
+	test_must_fail git -c pull.rebase=true pull . c1 c2 c3 2>err &&
+	test_i18ngrep ! "Pulling without specifying how to reconcile" err &&
+	test_i18ngrep "Cannot rebase onto multiple branches." err
+'
+
 test_expect_success 'merge c1 with c2' '
 	git reset --hard c1 &&
 	test -f c0.c &&
-- 
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